The research on simultaneous synthesis of molybdenum carbides and of titanium carbides by sol–gel method was conducted. (NH₄)₆Mo₇O₂₄·4H₂O and Ti[O(CH₂)₂CH₃]₄ were applied as precursors. The gaseous products were determined using mass spectrometry method. The phase composition of samples was identified by XRD method, and their morphology was examined by SEM method. After the hydrolysis of Ti[O(CH₂)₂CH₃]₄ nanometric TiO₂ was received. Before the synthesis (NH₄)₆Mo₇O₂₄·4H₂O decomposed into MoO₃ (t ≤ 673 K). At the temperature of 689–943 K MoO₃ was reduced into MoO₂ (or also into Mo). The synthesis of Mo₂C proceeded at the temperature of 973–1,189 K. In this temperature range also reduction of TiO₂ into Ti_xO_y took place. The synthesis of titanium carbides proceeded at the temperature t ≥ 1,285 K.

The machinability of hard-to-cut CoCr alloys manufactured by Selective Laser Melting (SLM) technology is not yet sufficiently studied. Therefore, this work focuses on evaluation of surface texture formation during face turning of CoCr alloy. As part of the research, two specimen types were subject to comparison: made with the application of conventional casting and manufactured by additive manufacturing—SLM. A number of analytical and experimental methods were employed to describe the specimen composition and morphology, as: X-Ray Diffraction Analysis (XRD), optical metallurgical microscopy, confocal optical microscopy, and Vickers hardness HV0.1 measurements. In the next stage, the measurements of surface topographies formed during turning in a range of variable cutting speeds and feeds were carried out. Ultimately the multi-factor MANOVA (Multivariate Analysis of Variance) illustrating the influence of manufacturing technology, cutting speed, and feed ratio on selected surface parameters of samples was made. It has been demonstrated that during face turning with feeds up to 0.15 mm/rev, the similar values of surface roughness height and material ratio curve parameters were reached for both tested CoCr alloys. However, in a range of higher feed values, the surface quality of CoCr samples fabricated by SLM was lower than that reached for CoCr after casting process.

Nanometric carbides of transition metals and silicon are obtained by using precursors. Control of the course of these processes require data concerning transformations of single precursor, transformations of precursor in the presence of reducing agent and synthesis of the carbide. In this work, the way of investigating such processes is described on the example of thermal decomposition of (NH₄)₆Mo₇O₂₄·4H₂O (precursor) in argon. The measurements were carried out by TG–DSC method. The solid products were identified by XRD method, and the gaseous products were determined by mass spectrometry method. There was demonstrated that the investigated process proceeded in five stages. Kinetic models (forms of f(α) and g(α) function) most consistent with experimental data and coefficients of Arrhenius equation A and E were determined for the stages. The Kissinger method and the Coats–Redfern equation were applied. In case of the Coats–Redfern equation, the calculations were performed by analogue method. In this way good consistency between the calculated and determined conversion degrees α(T) at practically constant values of A and E were obtained for distinguished stages and different sample heating rates.

The results of investigation on influence of the milling process on mixed powders of nanocrystalline TiC and TiB₂, obtained in non-hydrolytical sol–gel synthesis, and 316L stainless steel are presented. The powders have been used as substrates to prepare nanocomposite materials by Selective Laser Sintering/Melting process. In present work thermal analysis results along with the composition and structure of nanocrystalline powders have been presented. During investigation the following analytical techniques have been applied: XRD, TEM, TG-DSC-MS and SEM.