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There is a great demand for joining carbon, as well as titanium, with other elements, which ensures high resistance against chemical and corrosive environment attacks, as well as, importantly, better adherence of the carbon and titanium to coated substrates
Rodica Vladoiu. Special Issue: Carbon–Refractory Metal Nanostructures: Synthesis, Characterization and Applications. Materials 2021, 14, 831 .
AMA StyleRodica Vladoiu. Special Issue: Carbon–Refractory Metal Nanostructures: Synthesis, Characterization and Applications. Materials. 2021; 14 (4):831.
Chicago/Turabian StyleRodica Vladoiu. 2021. "Special Issue: Carbon–Refractory Metal Nanostructures: Synthesis, Characterization and Applications." Materials 14, no. 4: 831.
The current work aimed to characterize the morphology, chemical, and mechanical properties of Pt and PtTi thin films deposited via thermionic vacuum arc (TVA) method on glass and silicon substrates. The deposited thin films were characterized by means of a scanning electron microscope technique (SEM). The quantitative elemental microanalysis was done using energy-dispersive X-ray spectroscopy (EDS). The tribological properties were studied by a ball-on-disc tribometer, and the mechanical properties were measured using nanoindentation tests. The roughness, as well as the micro and nanoscale features, were characterized using atomic force microscopy (AFM) and transmission electron microscopy (TEM). The wettability of the deposited Pt and PtTi thin films was investigated by the surface free energy evaluation (SFE) method. The purpose of our study was to prove the potential applications of Pt-based thin films in fields, such as nanoelectronics, fuel cells, medicine, and materials science.
Sebastian Cozma; Rodica Vlǎdoiu; Aurelia Mandes; Virginia Dinca; Gabriel Prodan; Vilma Buršíková. Characterization of Platinum-Based Thin Films Deposited by Thermionic Vacuum Arc (TVA) Method. Materials 2020, 13, 1796 .
AMA StyleSebastian Cozma, Rodica Vlǎdoiu, Aurelia Mandes, Virginia Dinca, Gabriel Prodan, Vilma Buršíková. Characterization of Platinum-Based Thin Films Deposited by Thermionic Vacuum Arc (TVA) Method. Materials. 2020; 13 (7):1796.
Chicago/Turabian StyleSebastian Cozma; Rodica Vlǎdoiu; Aurelia Mandes; Virginia Dinca; Gabriel Prodan; Vilma Buršíková. 2020. "Characterization of Platinum-Based Thin Films Deposited by Thermionic Vacuum Arc (TVA) Method." Materials 13, no. 7: 1796.
This review summarizes the more-than-25-years of development of the so-called thermionic vacuum arc (TVA). TVA is an anodic arc discharge in vapors of the material to be deposited; the energy for its melting is delivered by means of a focused electron beam. The resulting material ions fall at the substrate where they form a well-adhesive layer; the ion energy is controllable. The deposited layers are, as a rule, free from droplets typical for cathodic arc deposition systems and the thermal stress of the substrates being coated is low. TVA is especially suitable for processing refractory metals, e.g., carbon or tungsten, however, in the course of time, various useful applications of this system originated. They include layers for fusion application, hard coatings, low-friction coatings, biomedical-applicable films, materials for optoelectronics, and for solid-state batteries. Apart from the diagnostic of the film properties, also the diagnostic of the TVA discharge itself as well as of the by TVA generated plasma was performed. The research and application of the TVA proceeds in broad international collaboration. At present, the TVA technology has found its firm place among the different procedures for thin film deposition.
Rodica Vladoiu; Milan Tichý; Aurelia Mandes; Virginia Dinca; Pavel Kudrna. Thermionic Vacuum Arc—A Versatile Technology for Thin Film Deposition and Its Applications. Coatings 2020, 10, 211 .
AMA StyleRodica Vladoiu, Milan Tichý, Aurelia Mandes, Virginia Dinca, Pavel Kudrna. Thermionic Vacuum Arc—A Versatile Technology for Thin Film Deposition and Its Applications. Coatings. 2020; 10 (3):211.
Chicago/Turabian StyleRodica Vladoiu; Milan Tichý; Aurelia Mandes; Virginia Dinca; Pavel Kudrna. 2020. "Thermionic Vacuum Arc—A Versatile Technology for Thin Film Deposition and Its Applications." Coatings 10, no. 3: 211.
Titanium-based composites—titanium and silver (TiAg) and titanium and carbon (TiC)—were synthesized by the Thermionic Vacuum Arc (TVA) method on substrates especially for gear wheels and camshaft coating as mechanical components of irrigation pumps. The films were characterized by surface morphology, microstructure, and roughness through X-ray Diffraction (XRD), Atomic Force Microscopy (AFM), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), and Small-Angle Neutron Scattering (SANS). The silver (Ag) films crystallized into a cubic system with lattice a = 4.0833 Å at room temperature, indexed as cubic Ag group Fm3m. The crystallites were oriented in the [111] direction, and mean grain size was 111 = 265 Å. The TiC structure revealed a predominant cubic TiC phase, with a = 0.4098 as a lattice parameter determined by Cohen’s method. Average roughness (Ra) was 8 nm for the as-grown 170 nm thick TiAg film, and 1.8 nm for the as-grown 120 nm thick TiC film. Characteristic SANS contribution was detected from the TiAg layer deposited on a substrate of high-quality stainless steel with 0.45% carbon (OLC45) in the range of 0.015 Å−1 ≤ Q ≤ 0.4 Å−1, revealing the presence of sharp surfaces and an averaged triaxial ellipsoidal core-shell object.
Rodica Vladoiu; Aurelia Mandes; Virginia Dinca; Maria Balasoiu; Dmytro Soloviov; Vitalii Turchenko. Synthesis and Characterization of Complex Nanostructured Thin Films Based on Titanium for Industrial Applications. Materials 2020, 13, 399 .
AMA StyleRodica Vladoiu, Aurelia Mandes, Virginia Dinca, Maria Balasoiu, Dmytro Soloviov, Vitalii Turchenko. Synthesis and Characterization of Complex Nanostructured Thin Films Based on Titanium for Industrial Applications. Materials. 2020; 13 (2):399.
Chicago/Turabian StyleRodica Vladoiu; Aurelia Mandes; Virginia Dinca; Maria Balasoiu; Dmytro Soloviov; Vitalii Turchenko. 2020. "Synthesis and Characterization of Complex Nanostructured Thin Films Based on Titanium for Industrial Applications." Materials 13, no. 2: 399.
To synthesize Carbon-Titanium (C-Ti) multilayer thin films deposited on silicon substrates was used Thermionic Vacuum Arc (TVA) method. The coated layers consisted of a base layer of about 100 nm of Carbon deposited at low evaporation rates. Subsequently, seven Carbon and Titanium layers were deposited alternatively on top of Carbon base layer, each of them has a final thickness up to 40 nm. In this study we obtained different batches of samples by variation of the substrate temperature between 0°C and 300°C, and the ion acceleration voltage applying a negative substrate bias voltage between 0V and -700V. To characterize the microstructure properties of as prepared C-Ti multilayer structures were used Electron Microscopy techniques (TEM, SEM, STEM) and Raman Spectroscopy. Results of tribological measurements are associated with the occurrence of atomic diffusion processes at Ti/C interface. To characterize the electrical conductive properties, the electrical resistance versus temperature have been measured.
Victor Ciupină; Cristian P. Lungu; Eugeniu Vasile; Gabriel C. Prodan; Corneliu Porosnicu; Rodica Vladoiu; Aurelia Mandes; Virginia Dinca; Virginia Nicolescu; Madalina Prodan; Radu Manu. Carbon-titanium multilayer films: Synthesis and characterization. AIP Conference Proceedings 2018, 2042, 020034 .
AMA StyleVictor Ciupină, Cristian P. Lungu, Eugeniu Vasile, Gabriel C. Prodan, Corneliu Porosnicu, Rodica Vladoiu, Aurelia Mandes, Virginia Dinca, Virginia Nicolescu, Madalina Prodan, Radu Manu. Carbon-titanium multilayer films: Synthesis and characterization. AIP Conference Proceedings. 2018; 2042 (1):020034.
Chicago/Turabian StyleVictor Ciupină; Cristian P. Lungu; Eugeniu Vasile; Gabriel C. Prodan; Corneliu Porosnicu; Rodica Vladoiu; Aurelia Mandes; Virginia Dinca; Virginia Nicolescu; Madalina Prodan; Radu Manu. 2018. "Carbon-titanium multilayer films: Synthesis and characterization." AIP Conference Proceedings 2042, no. 1: 020034.
Carbon-Titan (C-Ti) multilayer films were deposited on silicon substrates by means of Thermionic Vacuum Arc (TVA) method. The final thickness of the multilayer structures was up to 400nm. The coated layers consisted of a base layer of about 100nm of Carbon deposited at low evaporation rates in order to ensure its stability on the substrate. Subsequently, seven Carbon and Titanium layers were deposited alternatively on top of Carbon base layer, each of them has a final thickness up to 40nm. For this study we obtained different batches of samples by variation of the substrate temperature between 0°C and 400°C, and the ion acceleration voltage applying a negative substrate bias voltage up to -700V . A low deposition rate 0.14nm/s for C and 0.18nm/s for Ti respectively was used in order to obtain the precise thickness. The characterization of microstructure properties of as prepared C-Ti multilayer structures were done using Electron Microscopy techniques (TEM, SEM, STEM), and Raman Spectroscopy. TEM and STEM studies were performed on Philips Tecnai F30G2 at 300kV setup. Identification of the structure of the material was based on the data obtained from diffraction pattern with a Philips CM120ST using CRISP2 application, with crystalline material module (ELD). The morphology and thickness of the samples were also determined by SEM techniques with Quanta FEG450 setup. The thickness thus measured are between 155.4nm and 393.9nm. Raman spectra were measured at room temperature on a Jobin Yvon T6400 spectrometer using 514.5nm line of an Ar+ laser as the excitation source. The measurements reveal the content of diamond-like sp3 and graphite-like sp2; the ratio sp3/sp2 increases when the bias voltage increases. For tribological characteristics determination, systematic measurements were performed using a ball-on-disk tribometer made by CSM Switzerland with normal force of 0.5, 1, 2, 3N respectively. The coefficient of friction depends on the substrate temperature and on the bias voltage. To characterize the electrical conductive properties, the electrical surface resistance versus temperature have been measured using drop voltage between two ohmic contacts on the sample and drop voltage on a standard resistance in a constant current regime. Owing to metallic layer of titanium in multilayer films, mechanical and electrical properties can be improved.
Victor Ciupina; Rodica Vladoiu; Cristian P. Lungu; Corneliu Porosnicu; Madalina Prodan; Aurelia Mandes; Virginia Dinca; Eugeniu Vasile; Ovidiu Cupsa; Virginia Nicolescu; Gabriel C. Prodan. Nanostructured carbon-titanium multilayer films obtained by thermionic vacuum arc method. Nanostructured Thin Films XI 2018, 10731, 1073107 .
AMA StyleVictor Ciupina, Rodica Vladoiu, Cristian P. Lungu, Corneliu Porosnicu, Madalina Prodan, Aurelia Mandes, Virginia Dinca, Eugeniu Vasile, Ovidiu Cupsa, Virginia Nicolescu, Gabriel C. Prodan. Nanostructured carbon-titanium multilayer films obtained by thermionic vacuum arc method. Nanostructured Thin Films XI. 2018; 10731 ():1073107.
Chicago/Turabian StyleVictor Ciupina; Rodica Vladoiu; Cristian P. Lungu; Corneliu Porosnicu; Madalina Prodan; Aurelia Mandes; Virginia Dinca; Eugeniu Vasile; Ovidiu Cupsa; Virginia Nicolescu; Gabriel C. Prodan. 2018. "Nanostructured carbon-titanium multilayer films obtained by thermionic vacuum arc method." Nanostructured Thin Films XI 10731, no. : 1073107.
A series of the multicomponent thin films (binary: Ti-C; Ti-Ag and ternary: Ti-C-Ag; Ti-C-Al) were fabricated by Thermionic Vacuum Arc (TVA) technology in order to study the wear resistance and the anticorrosion properties. The effects of Ti amount on the microstructure, tribological and morphological properties were subsequently investigated. TVA is an original deposition method using a combination of anodic arc and electron gun systems for the growth of films. The samples were characterized using scanning electron microscope (SEM) and a transmission electron microscope (TEM) accompanied by selected area electron diffraction (SAED). Tribological properties were studied by a ball-on-disc tribometer in the dry regime and the wettability was assessed by measuring the contact angle with the See System apparatus. Wear Rate results indicate an improved sliding wear behavior for Ti-C-Ag: 1.31 × 10−7 mm3/N m (F = 2 N) compared to Ti-C-Al coating wear rate: 4.24 × 10−7 mm3/N m. On the other hand, by increasing the normal load to 3 N an increase to the wear rate was observed for Ti-C-Ag: 2.58 × 10−5 mm3 compared to 2.33 × 10−6 mm3 for Ti-C-Al coating.
Aurelia Mandes; Rodica Vladoiu; Gabriel Prodan; Virginia Dinca; Corneliu Porosnicu; Paul Dinca. The Properties of Binary and Ternary Ti Based Coatings Produced by Thermionic Vacuum Arc (TVA) Technology. Coatings 2018, 8, 114 .
AMA StyleAurelia Mandes, Rodica Vladoiu, Gabriel Prodan, Virginia Dinca, Corneliu Porosnicu, Paul Dinca. The Properties of Binary and Ternary Ti Based Coatings Produced by Thermionic Vacuum Arc (TVA) Technology. Coatings. 2018; 8 (3):114.
Chicago/Turabian StyleAurelia Mandes; Rodica Vladoiu; Gabriel Prodan; Virginia Dinca; Corneliu Porosnicu; Paul Dinca. 2018. "The Properties of Binary and Ternary Ti Based Coatings Produced by Thermionic Vacuum Arc (TVA) Technology." Coatings 8, no. 3: 114.
Nanostructured C-Ag thin films of 200 nm thickness were successfully synthesized by the Thermionic Vacuum Arc (TVA) method. The influence of different substrates (glass, silicon wafers, and stainless steel) on the microstructure, morphology, and mechanical properties of nanostructured C-Ag thin films was characterized by High-Resolution Transmission Electron Microscopy (HRTEM), Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), and TI 950 (Hysitron) nanoindenter equipped with Berkovich indenter, respectively. The film’s hardness deposited on glass (HC-Ag/Gl = 1.8 GPa) was slightly lower than in the case of the C-Ag film deposited on a silicon substrate (HC-Ag/Si = 2.2 GPa). Also the apparent elastic modulus Eeff was lower for C-Ag/Gl sample (Eeff = 100 GPa) than for C-Ag/Si (Eeff = 170 GPa), while the values for average roughness are Ra=2.9 nm (C-Ag/Si) and Ra=10.6 (C-Ag/Gl). Using the modulus mapping mode, spontaneous and indentation-induced aggregation of the silver nanoparticles was observed for both C-Ag/Gl and C-Ag/Si samples. The nanocomposite C-Ag film exhibited not only higher hardness and effective elastic modulus, but also a higher fracture resistance toughness to the silicon substrate compared to the glass substrate.
Rodica Vladoiu; Aurelia Mandes; Virginia Dinca-Balan; Vilma Buršíková. Structural and Mechanical Properties of Nanostructured C-Ag Thin Films Synthesized by Thermionic Vacuum Arc Method. Journal of Nanomaterials 2018, 2018, 1 -10.
AMA StyleRodica Vladoiu, Aurelia Mandes, Virginia Dinca-Balan, Vilma Buršíková. Structural and Mechanical Properties of Nanostructured C-Ag Thin Films Synthesized by Thermionic Vacuum Arc Method. Journal of Nanomaterials. 2018; 2018 ():1-10.
Chicago/Turabian StyleRodica Vladoiu; Aurelia Mandes; Virginia Dinca-Balan; Vilma Buršíková. 2018. "Structural and Mechanical Properties of Nanostructured C-Ag Thin Films Synthesized by Thermionic Vacuum Arc Method." Journal of Nanomaterials 2018, no. : 1-10.
To obtain protective nitrogen doped Si-C multilayer coatings on carbon, used to improve the oxidation resistance of carbon, was used TVA method. The initial carbon layer has been deposed on a silicon substrate in the absence of nitrogen, and then a 3nm Si thin film to cover carbon layer was deposed. Further, seven Si and C layers were alternatively deposed in the presence of nitrogen ions. In order to form silicon carbide at the interface between silicon and carbon layers, all carbon, silicon and nitrogen ions energy has increased up to 150eV. The characterization of microstructure and electrical properties of as-prepared N-Si-C multilayer structures were done using Transmission Electron Microscopy (TEM, STEM) techniques, Thermal Desorption Spectroscopy (TDS) and electrical measurements. The retention of oxygen in the protective layer of N-Si-C is due to the following phenomena: (a) The reaction between oxygen and silicon carbide resulting in silicon oxide and carbon dioxide; (b) The reaction involving oxygen, nitrogen and silicon resulting silicon oxinitride with a variable composition; (c) Nitrogen acts as a trapping barrier for oxygen. To perform electrical measurements, ohmic contacts were attached on the N-Si-C samples. Electrical conductivity was measured in constant current mode. To explain the temperature behavior of electrical conductivity we assumed a thermally activated electric transport mechanism.
Victor Ciupina; Eugeniu Vasile; Corneliu Porosnicu; Rodica Vladoiu; Aurelia Mandes; Virginia Dinca; Virginia Nicolescu; Radu Manu; Paul Dinca; Agripina Zaharia. Nitrogen doped silicon-carbon multilayer protective coatings on carbon obtained by thermionic vacuum arc (TVA) method. TURKISH PHYSICAL SOCIETY 33RD INTERNATIONAL PHYSICS CONGRESS (TPS33) 2018, 1935, 050001 .
AMA StyleVictor Ciupina, Eugeniu Vasile, Corneliu Porosnicu, Rodica Vladoiu, Aurelia Mandes, Virginia Dinca, Virginia Nicolescu, Radu Manu, Paul Dinca, Agripina Zaharia. Nitrogen doped silicon-carbon multilayer protective coatings on carbon obtained by thermionic vacuum arc (TVA) method. TURKISH PHYSICAL SOCIETY 33RD INTERNATIONAL PHYSICS CONGRESS (TPS33). 2018; 1935 (1):050001.
Chicago/Turabian StyleVictor Ciupina; Eugeniu Vasile; Corneliu Porosnicu; Rodica Vladoiu; Aurelia Mandes; Virginia Dinca; Virginia Nicolescu; Radu Manu; Paul Dinca; Agripina Zaharia. 2018. "Nitrogen doped silicon-carbon multilayer protective coatings on carbon obtained by thermionic vacuum arc (TVA) method." TURKISH PHYSICAL SOCIETY 33RD INTERNATIONAL PHYSICS CONGRESS (TPS33) 1935, no. 1: 050001.
The synthesis of Ag, Mg and Si nanocrystalline, embedded in a hydrogen-free amorphous carbon (a-C) matrix, deposited by a high vacuum and free buffer gas technique, were investigated. The films with compact structures and extremely smooth surfaces were prepared using the thermionic vacuum arc method in one electron gun configuration, on glass and silicon substrates. The surface morphology and wettability of the obtained multifunctional thin films were investigated using transmission electron microscopy (TEM), scanning electron microscopy (SEM) and free surface energy (FSE) by See System. The results from the TEM measurements show how the Ag, Mg and Si interacted with carbon and the influence these materials have on the thin film structure formation and the grain size distribution. SEM correlated with EDX results reveal a very precise comparative study, regarding the quantity of the elements that morphed into carbides nanostructures. Also, the FSE results prove how different materials in combination with carbon can make changes to the surface properties.
Virginia Dinca-Balan; Rodica Vladoiu; Aurelia Mandes; Gabriel Prodan. Correlation study of nanocrystalline carbon doped thin films prepared by a thermionic vacuum arc deposition technique. Journal of Physics D: Applied Physics 2017, 50, 435305 .
AMA StyleVirginia Dinca-Balan, Rodica Vladoiu, Aurelia Mandes, Gabriel Prodan. Correlation study of nanocrystalline carbon doped thin films prepared by a thermionic vacuum arc deposition technique. Journal of Physics D: Applied Physics. 2017; 50 (43):435305.
Chicago/Turabian StyleVirginia Dinca-Balan; Rodica Vladoiu; Aurelia Mandes; Gabriel Prodan. 2017. "Correlation study of nanocrystalline carbon doped thin films prepared by a thermionic vacuum arc deposition technique." Journal of Physics D: Applied Physics 50, no. 43: 435305.
Protective nitrogen doped Si-C multilayer coatings on carbon, used to improve the oxidation resistance of carbon, were obtained by Thermionic Vacuum Arc (TVA) method. The initial carbon layer having a thickness of 100nm has been deposed on a silicon substrate in the absence of nitrogen, and then a 3nm Si thin film to cover carbon layer was deposed. Further, seven Si and C layers were alternatively deposed in the presence of nitrogen ions, each having a thickness of 40nm. In order to form silicon carbide at the interface between silicon and carbon layers, all carbon, silicon and nitrogen ions energy has increased up to 150eV . The characterization of microstructure and electrical properties of as-prepared N-Si-C multilayer structures were done using Transmission Electron Microscopy (TEM, STEM) techniques, Thermal Desorption Spectroscopy (TDS) and electrical measurements. Oxidation protection of carbon is based on the reaction between oxygen and silicon carbide, resulting in SiO2, SiO and CO2, and also by reaction involving N, O and Si, resulting in silicon oxynitride (SiNxOy) with a continuously variable composition, and on the other hand, since nitrogen acts as a trapping barrier for oxygen. To perform electrical measurements, 80% silver filled two-component epoxy-based glue ohmic contacts were attached on the N-Si-C samples. Electrical conductivity was measured in constant current mode. The experimental data show the increase of conductivity with the increase of the nitrogen content. To explain the temperature behavior of electrical conductivity we assumed a thermally activated electric transport mechanism.
Victor Ciupina; Corneliu Porosnicu; Eugeniu Vasile; Cristian P. Lungu; Rodica Vladoiu; Ionut Jepu; Aurelia Mandes; Virginia Dinca; Aureliana Caraiane; Virginia Nicolescu; Ovidiu Cupsa; Paul Dinca; Agripina Zaharia. Nitrogen doped silicon-carbon multilayer protective coatings on carbon obtained by TVA method. Nanostructured Thin Films X 2017, 10356, 103560O .
AMA StyleVictor Ciupina, Corneliu Porosnicu, Eugeniu Vasile, Cristian P. Lungu, Rodica Vladoiu, Ionut Jepu, Aurelia Mandes, Virginia Dinca, Aureliana Caraiane, Virginia Nicolescu, Ovidiu Cupsa, Paul Dinca, Agripina Zaharia. Nitrogen doped silicon-carbon multilayer protective coatings on carbon obtained by TVA method. Nanostructured Thin Films X. 2017; 10356 ():103560O.
Chicago/Turabian StyleVictor Ciupina; Corneliu Porosnicu; Eugeniu Vasile; Cristian P. Lungu; Rodica Vladoiu; Ionut Jepu; Aurelia Mandes; Virginia Dinca; Aureliana Caraiane; Virginia Nicolescu; Ovidiu Cupsa; Paul Dinca; Agripina Zaharia. 2017. "Nitrogen doped silicon-carbon multilayer protective coatings on carbon obtained by TVA method." Nanostructured Thin Films X 10356, no. : 103560O.
Victor Ciupină; Iulian Prioteasa; Daniela Ilie; Radu Manu; Lucian Petrăşescu; Ştefan Gabriel Tutun; Paul Dincă; Ion Mustaţă; Cristian Petrică Lungu; Ionuţ Jepu; Eugeniu Vasile; Virginia Nicolescu; Rodica Vladoiu. Synthesis and characterization of Copper/Cobalt/Copper/Iron nanostructurated films with magnetoresistive properties. TURKISH PHYSICAL SOCIETY 32ND INTERNATIONAL PHYSICS CONGRESS (TPS32) 2017, 1815, 40001 .
AMA StyleVictor Ciupină, Iulian Prioteasa, Daniela Ilie, Radu Manu, Lucian Petrăşescu, Ştefan Gabriel Tutun, Paul Dincă, Ion Mustaţă, Cristian Petrică Lungu, Ionuţ Jepu, Eugeniu Vasile, Virginia Nicolescu, Rodica Vladoiu. Synthesis and characterization of Copper/Cobalt/Copper/Iron nanostructurated films with magnetoresistive properties. TURKISH PHYSICAL SOCIETY 32ND INTERNATIONAL PHYSICS CONGRESS (TPS32). 2017; 1815 ():40001.
Chicago/Turabian StyleVictor Ciupină; Iulian Prioteasa; Daniela Ilie; Radu Manu; Lucian Petrăşescu; Ştefan Gabriel Tutun; Paul Dincă; Ion Mustaţă; Cristian Petrică Lungu; Ionuţ Jepu; Eugeniu Vasile; Virginia Nicolescu; Rodica Vladoiu. 2017. "Synthesis and characterization of Copper/Cobalt/Copper/Iron nanostructurated films with magnetoresistive properties." TURKISH PHYSICAL SOCIETY 32ND INTERNATIONAL PHYSICS CONGRESS (TPS32) 1815, no. : 40001.
Victor Ciupina; Eugeniu Vasile; Corneliu Porosnicu; Gabriel C. Prodan; Cristian P. Lungu; Rodica Vladoiu; Ionut Jepu; Aurelia Mandes; Virginia Dinca; Aureliana Caraiane; Virginia Nicolescu; Paul Dinca; Agripina Zaharia. Characterization of nitrogen doped silicon-carbon multi-layer nanostructures obtained by TVA method. Nanostructured Thin Films IX 2016, 992910 -992910-10.
AMA StyleVictor Ciupina, Eugeniu Vasile, Corneliu Porosnicu, Gabriel C. Prodan, Cristian P. Lungu, Rodica Vladoiu, Ionut Jepu, Aurelia Mandes, Virginia Dinca, Aureliana Caraiane, Virginia Nicolescu, Paul Dinca, Agripina Zaharia. Characterization of nitrogen doped silicon-carbon multi-layer nanostructures obtained by TVA method. Nanostructured Thin Films IX. 2016; ():992910-992910-10.
Chicago/Turabian StyleVictor Ciupina; Eugeniu Vasile; Corneliu Porosnicu; Gabriel C. Prodan; Cristian P. Lungu; Rodica Vladoiu; Ionut Jepu; Aurelia Mandes; Virginia Dinca; Aureliana Caraiane; Virginia Nicolescu; Paul Dinca; Agripina Zaharia. 2016. "Characterization of nitrogen doped silicon-carbon multi-layer nanostructures obtained by TVA method." Nanostructured Thin Films IX , no. : 992910-992910-10.
Corneliu Porosnicu Rodica Vladoiu. DLC Thin Films and Carbon Nanocomposite Growth by Thermionic Vacuum Arc (TVA) Technology. Diamond and Carbon Composites and Nanocomposites 2016, 1 .
AMA StyleCorneliu Porosnicu Rodica Vladoiu. DLC Thin Films and Carbon Nanocomposite Growth by Thermionic Vacuum Arc (TVA) Technology. Diamond and Carbon Composites and Nanocomposites. 2016; ():1.
Chicago/Turabian StyleCorneliu Porosnicu Rodica Vladoiu. 2016. "DLC Thin Films and Carbon Nanocomposite Growth by Thermionic Vacuum Arc (TVA) Technology." Diamond and Carbon Composites and Nanocomposites , no. : 1.
Ionized nitrogen doped Si-C thin films at 200°C substrate temperature were obtained by Thermionic Vacuum Arc (TVA) method. To increase the energy of N, C and Si ions, -400V, -600V and -1000V negative bias voltages was applied on the substrate. The 400nm, 600nm and 1000nm N-SiC coatings on glass was deposed. To characterize the structure of as-prepared N-SiC coatings, Transmission Electron Microscopy (TEM), High Resolution Transmission Electron Microscopy (HRTEM), X-Ray and Photoelectron Spectroscopy (XPS) techniques was performed. Electrical conductivity was measured comparing the potential drop on the structure with the potential drop on a series standard resistance in a constant current mode. To justify the dependence of measured electrical conductivity by the temperature, we assume a thermally activated electrical transport mechanism.
Victor Ciupina; Cristian P. Lungu; Rodica Vladoiu; Gabriel C. Prodan; Stefan Antohe; Corneliu Porosnicu; Iuliana Stanescu; Ionut Jepu; Sorina Iftimie; Marius Belc; Aurelia Mandes; Virginia Dinca; Eugeniu Vasile; Valeriu Zarovski; Virginia Nicolescu; Aureliana Caraiane. Structural and electrical properties of N doped SiC nanostructures obtained by TVA method. Nanostructured Thin Films VIII 2015, 9558, 955808 .
AMA StyleVictor Ciupina, Cristian P. Lungu, Rodica Vladoiu, Gabriel C. Prodan, Stefan Antohe, Corneliu Porosnicu, Iuliana Stanescu, Ionut Jepu, Sorina Iftimie, Marius Belc, Aurelia Mandes, Virginia Dinca, Eugeniu Vasile, Valeriu Zarovski, Virginia Nicolescu, Aureliana Caraiane. Structural and electrical properties of N doped SiC nanostructures obtained by TVA method. Nanostructured Thin Films VIII. 2015; 9558 ():955808.
Chicago/Turabian StyleVictor Ciupina; Cristian P. Lungu; Rodica Vladoiu; Gabriel C. Prodan; Stefan Antohe; Corneliu Porosnicu; Iuliana Stanescu; Ionut Jepu; Sorina Iftimie; Marius Belc; Aurelia Mandes; Virginia Dinca; Eugeniu Vasile; Valeriu Zarovski; Virginia Nicolescu; Aureliana Caraiane. 2015. "Structural and electrical properties of N doped SiC nanostructures obtained by TVA method." Nanostructured Thin Films VIII 9558, no. : 955808.
Rodica Vladoiu; Aurelia Mandes; Virginia Dinca Balan; Gabriel Prodan; Pavel Kudrna; Milan Tichy. Magnesium plasma diagnostics by heated probe and characterization of the Mg thin films deposited by thermionic vacuum arc technology. Plasma Sources Science and Technology 2015, 24, 1 .
AMA StyleRodica Vladoiu, Aurelia Mandes, Virginia Dinca Balan, Gabriel Prodan, Pavel Kudrna, Milan Tichy. Magnesium plasma diagnostics by heated probe and characterization of the Mg thin films deposited by thermionic vacuum arc technology. Plasma Sources Science and Technology. 2015; 24 (3):1.
Chicago/Turabian StyleRodica Vladoiu; Aurelia Mandes; Virginia Dinca Balan; Gabriel Prodan; Pavel Kudrna; Milan Tichy. 2015. "Magnesium plasma diagnostics by heated probe and characterization of the Mg thin films deposited by thermionic vacuum arc technology." Plasma Sources Science and Technology 24, no. 3: 1.
Crystalline Si-C thin films were prepared at substrate temperature between 200°C and 1000°C using Thermionic Vacuum Arc (TVA) method. To increase the acceleration potential drop a negative bias voltage up to -1000V was applied on the substrate. The 200nm thickness carbon thin films was deposed on glass and Si substrate and then 200-500 nm thickness Si-C layer on carbon thin films was deposed. Transmission Electron Microscopy (TEM), High Resolution Transmission Electron Microscopy (HRTEM), X-Ray Photoelectron Spectroscopy (XPS), and electrical conductivity measurement technique characterized the structure and physical characteristics of as-prepared SiC coating. At a constant acceleration potential drop, the electrical conductivity of the Si-C films deposed on C, increase with increasing of substrate temperature. On the other part, significant increases in the acceleration potential drop at constant substrate temperature lead to a variation of the crystallinity and electrical conductivity of the SiC coatings XPS analysis was performed using a Quantera SXM equipment, with monochromatic AlKα radiation at 1486.6eV. Electrical conductivity of the Si-C coating on carbon at different temperatures was measured comparing the potential drop on the sample with the potential drop on a series standard resistance in constant mode.
Victor Ciupina; Cristian P. Lungu; Rodica Vladoiu; Gabriel C. Prodan; Stefan Antohe; Corneliu Porosnicu; Iuliana Stanescu; Ionut Jepu; Sorina Iftimie; Madalina Prodan; Aurelia Mandes; Virginia Dinca; Eugeniu Vasile; Valeriu Zarovski; Virginia Nicolescu. The effect of the substrate temperature and the acceleration potential drop on the structural and physical properties of SiC thin films deposed by TVA method. Nanostructured Thin Films VII 2014, 9172, 91720Y .
AMA StyleVictor Ciupina, Cristian P. Lungu, Rodica Vladoiu, Gabriel C. Prodan, Stefan Antohe, Corneliu Porosnicu, Iuliana Stanescu, Ionut Jepu, Sorina Iftimie, Madalina Prodan, Aurelia Mandes, Virginia Dinca, Eugeniu Vasile, Valeriu Zarovski, Virginia Nicolescu. The effect of the substrate temperature and the acceleration potential drop on the structural and physical properties of SiC thin films deposed by TVA method. Nanostructured Thin Films VII. 2014; 9172 ():91720Y.
Chicago/Turabian StyleVictor Ciupina; Cristian P. Lungu; Rodica Vladoiu; Gabriel C. Prodan; Stefan Antohe; Corneliu Porosnicu; Iuliana Stanescu; Ionut Jepu; Sorina Iftimie; Madalina Prodan; Aurelia Mandes; Virginia Dinca; Eugeniu Vasile; Valeriu Zarovski; Virginia Nicolescu. 2014. "The effect of the substrate temperature and the acceleration potential drop on the structural and physical properties of SiC thin films deposed by TVA method." Nanostructured Thin Films VII 9172, no. : 91720Y.
Binary elemental plasma of carbon and silver was synthesized using the thermionic vacuum arc technology for the first time in this configuration. The structural investigations of the deposited silver/amorphous carbon (Ag/a-C) nanocomposites thin film on different materials, such as Si, glass, and stainless steel OLC 45 substrates performed by high-resolution transmission electron microscopy were reported, as well as the modification of the properties at the nanometer level.
Aurelia Mandes; Rodica Vladoiu; Virginia Dinca; Gabriel Prodan. Binary C-Ag Plasma Breakdown and Structural Characterization of the Deposited Thin Films by Thermionic Vacuum Arc Method. IEEE Transactions on Plasma Science 2014, 42, 2806 -2807.
AMA StyleAurelia Mandes, Rodica Vladoiu, Virginia Dinca, Gabriel Prodan. Binary C-Ag Plasma Breakdown and Structural Characterization of the Deposited Thin Films by Thermionic Vacuum Arc Method. IEEE Transactions on Plasma Science. 2014; 42 (10):2806-2807.
Chicago/Turabian StyleAurelia Mandes; Rodica Vladoiu; Virginia Dinca; Gabriel Prodan. 2014. "Binary C-Ag Plasma Breakdown and Structural Characterization of the Deposited Thin Films by Thermionic Vacuum Arc Method." IEEE Transactions on Plasma Science 42, no. 10: 2806-2807.
Victor Ciupina; Cristian Petrica Lungu; Rodica Vladoiu; Gabriel Prodan; Corneliu Porosnicu; Marius Belc; Iuliana M. Stanescu; Eugeniu Vasile; Razvan Rughiniş. Silicon carbide multilayer protective coating on carbon obtained by thermionic vacuum arc method. Journal of Nanophotonics 2014, 8, 83996 .
AMA StyleVictor Ciupina, Cristian Petrica Lungu, Rodica Vladoiu, Gabriel Prodan, Corneliu Porosnicu, Marius Belc, Iuliana M. Stanescu, Eugeniu Vasile, Razvan Rughiniş. Silicon carbide multilayer protective coating on carbon obtained by thermionic vacuum arc method. Journal of Nanophotonics. 2014; 8 (1):83996.
Chicago/Turabian StyleVictor Ciupina; Cristian Petrica Lungu; Rodica Vladoiu; Gabriel Prodan; Corneliu Porosnicu; Marius Belc; Iuliana M. Stanescu; Eugeniu Vasile; Razvan Rughiniş. 2014. "Silicon carbide multilayer protective coating on carbon obtained by thermionic vacuum arc method." Journal of Nanophotonics 8, no. 1: 83996.
The aim of this contribution is to present the properties of the hydrogenated DLC (a-C:H) films and to study their growth carried out in a special deposition technique based on Gaseous Thermionic Vacuum Arc (G-TVA) method. The mechanical properties were investigated on cross-sectional samples using the Fischerscope HM 2000 depth sensing indentation (DSI) tester.
Mirela Contulov; Rodica Vladoiu; Aurelia Mandes; Victor Ciupina; Vilma Buršíková. Surface Engineering of the Hydrogenated DLC (a-C:H) Coatings with Optimized Mechanical Performance. Advanced Materials Research 2013, 816-817, 33 -37.
AMA StyleMirela Contulov, Rodica Vladoiu, Aurelia Mandes, Victor Ciupina, Vilma Buršíková. Surface Engineering of the Hydrogenated DLC (a-C:H) Coatings with Optimized Mechanical Performance. Advanced Materials Research. 2013; 816-817 ():33-37.
Chicago/Turabian StyleMirela Contulov; Rodica Vladoiu; Aurelia Mandes; Victor Ciupina; Vilma Buršíková. 2013. "Surface Engineering of the Hydrogenated DLC (a-C:H) Coatings with Optimized Mechanical Performance." Advanced Materials Research 816-817, no. : 33-37.