This page has only limited features, please log in for full access.
It is of great significance to improve the tribological performances of self-lubricating system to reduce the exfoliation of abrasive particles. In this work, tribological performances of Si3N4–PTFE–EP self-lubricating composites with surface-modified micro/nano-Si3N4 (20 nm, 100 nm, 500 nm, 1–3 μm, and 10 μm) prepared by high-pressure (3 GPa) compression molding are investigated systematically. The results show that although the surface modification of nano-Si3N4 can improve tribological performances of Si3N4–PTFE–EP composite, Si3N4 particle size is the more critical factor. When Si3N4 particle size is 10 μm, the tribological performances of 70M–Si3N4–30PTFE–EP, 50M–Si3N4–50PTFE–EP, and 30M–Si3N4–70PTFE–EP composites are optimal.
Dapeng Gu; Shouyao Liu; Gaifen Lu; Shuaibing Wang; Zibo Wang; Xiaofan Chen; Suwen Chen; Bingchao Yang; Deng Pan. Tribological performances of micro/nano-Si3N4–PTFE–EP composites prepared by high-pressure compression molding. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 2021, 235, 991 -1003.
AMA StyleDapeng Gu, Shouyao Liu, Gaifen Lu, Shuaibing Wang, Zibo Wang, Xiaofan Chen, Suwen Chen, Bingchao Yang, Deng Pan. Tribological performances of micro/nano-Si3N4–PTFE–EP composites prepared by high-pressure compression molding. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications. 2021; 235 (5):991-1003.
Chicago/Turabian StyleDapeng Gu; Shouyao Liu; Gaifen Lu; Shuaibing Wang; Zibo Wang; Xiaofan Chen; Suwen Chen; Bingchao Yang; Deng Pan. 2021. "Tribological performances of micro/nano-Si3N4–PTFE–EP composites prepared by high-pressure compression molding." Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 235, no. 5: 991-1003.
Two-dimensional (2D) layered bismuth (Bi) with a thickness-dependent direct bandgap (0–0.55 eV) has attracted ever-increasing research interest in electronics, energy storage and conversion devices.
Bingchao Yang; Xiangjun Li; Yong Cheng; Shuai Duan; Bo Zhao; Wencai Yi; Chao Wang; Hairui Sun; Zhixiu Wang; Dapeng Gu; Suwen Chen; Xiaobing Liu. Liquid phase exfoliation of bismuth nanosheets for flexible all-solid-state supercapacitors with high energy density. Journal of Materials Chemistry C 2020, 1 .
AMA StyleBingchao Yang, Xiangjun Li, Yong Cheng, Shuai Duan, Bo Zhao, Wencai Yi, Chao Wang, Hairui Sun, Zhixiu Wang, Dapeng Gu, Suwen Chen, Xiaobing Liu. Liquid phase exfoliation of bismuth nanosheets for flexible all-solid-state supercapacitors with high energy density. Journal of Materials Chemistry C. 2020; ():1.
Chicago/Turabian StyleBingchao Yang; Xiangjun Li; Yong Cheng; Shuai Duan; Bo Zhao; Wencai Yi; Chao Wang; Hairui Sun; Zhixiu Wang; Dapeng Gu; Suwen Chen; Xiaobing Liu. 2020. "Liquid phase exfoliation of bismuth nanosheets for flexible all-solid-state supercapacitors with high energy density." Journal of Materials Chemistry C , no. : 1.
The tribological performances of ceramic-polymer composites prepared by high pressure (3GPa) compression molding of Silicon nitride (Si3N4) and Polytetrafluoroethylene (PTFE) with epoxy resin (EP) binder were investigated under the dry friction conditions. Fourier Transform Infrared (FTIR) Spectroscopy, Field Emission Scanning Electron Microscopy (FE-SEM) and Energy Dispersive Spectroscopy (EDS) were utilized to characterize Si3N4-PTFE-EP composites. The Vickers hardness and Shore hardness were tested respectively and the thermal stability was evaluated by Thermogravimetric Analysis (TGA). The results indicate that the lowest wear rate reaches 10−7 mm3(Nm)−1 and the lowest friction coefficient is about 0.06. With the increase of the PTFE mass fraction, the main wear form gradually changes from abrasive wear to adhesive wear, but fatigue wear always exists.
Dapeng Gu; Shouyao Liu; Suwen Chen; Kefeng Song; Bingchao Yang; Deng Pan. Tribological Performance of Si3N4-PTFE Composites Prepared by High-Pressure Compression Molding. Tribology Transactions 2020, 63, 756 -769.
AMA StyleDapeng Gu, Shouyao Liu, Suwen Chen, Kefeng Song, Bingchao Yang, Deng Pan. Tribological Performance of Si3N4-PTFE Composites Prepared by High-Pressure Compression Molding. Tribology Transactions. 2020; 63 (4):756-769.
Chicago/Turabian StyleDapeng Gu; Shouyao Liu; Suwen Chen; Kefeng Song; Bingchao Yang; Deng Pan. 2020. "Tribological Performance of Si3N4-PTFE Composites Prepared by High-Pressure Compression Molding." Tribology Transactions 63, no. 4: 756-769.
A novel method combined with fabric embossing (embossing with fabric template) and thermal annealing is proposed to prepare multistage textured superhydrophobic polytetrafluoroethylene (PTFE) surface. Multistage (four-stage) textures of microscale Y-grooves (≈175 µm), F-grooves (≈10 µm), warts (≈3 µm), and nanoscale dendrites (≈380 nm) were obtained. The multistage textures endowed the PTFE surface with better superhydrophobicity, comparing with the two-stage textures with Y-grooves and F-grooves or the two-stage textures with warts and dendrites. Optimum superhydrophobicity is obtained at thermal annealing temperatures 345 °C and 360 °C.
Dapeng Gu; Kefeng Song; Suwen Chen; Shouyao Liu; Bingchao Yang; Xiaoying Ma; Zibo Wang; Shuaibing Wang. Multistage textured superhydrophobic polytetrafluoroethylene surface prepared by fabric embossing and thermal annealing. Materials Letters 2020, 268, 127556 .
AMA StyleDapeng Gu, Kefeng Song, Suwen Chen, Shouyao Liu, Bingchao Yang, Xiaoying Ma, Zibo Wang, Shuaibing Wang. Multistage textured superhydrophobic polytetrafluoroethylene surface prepared by fabric embossing and thermal annealing. Materials Letters. 2020; 268 ():127556.
Chicago/Turabian StyleDapeng Gu; Kefeng Song; Suwen Chen; Shouyao Liu; Bingchao Yang; Xiaoying Ma; Zibo Wang; Shuaibing Wang. 2020. "Multistage textured superhydrophobic polytetrafluoroethylene surface prepared by fabric embossing and thermal annealing." Materials Letters 268, no. : 127556.
Wear resistance of PMMA/PTFE composite improved by heat treatment (pressures temperatures, times).
Dapeng Gu; Longxiao Zhang; Suwen Chen; Kefeng Song; Deng Pan; Bingchao Yang; Shouyao Liu. Heat treatment to improve the wear resistance of PTFE/PMMA composites. RSC Advances 2019, 9, 22289 -22294.
AMA StyleDapeng Gu, Longxiao Zhang, Suwen Chen, Kefeng Song, Deng Pan, Bingchao Yang, Shouyao Liu. Heat treatment to improve the wear resistance of PTFE/PMMA composites. RSC Advances. 2019; 9 (39):22289-22294.
Chicago/Turabian StyleDapeng Gu; Longxiao Zhang; Suwen Chen; Kefeng Song; Deng Pan; Bingchao Yang; Shouyao Liu. 2019. "Heat treatment to improve the wear resistance of PTFE/PMMA composites." RSC Advances 9, no. 39: 22289-22294.
An analytical model for large-cylinder asymmetrical rolling is proposed based on an improved slab method, which can predict the rolling force more quickly. In this method, uneven normal and shear stresses acting on the vertical side are supposed. In the solution, the upper and lower contact lengths are different, and the roll gap is divided into four slabs. Moreover, the effects of the rolling parameters such as roll speed ratio, roll radius, exit thickness, and radius of cylinder on the rolling force and cross-shear zone ratio are investigated. The cross-shear zone ratio, which means the shear effect, is a key parameter in reducing rolling force and microstructure refinement. This method is conducted with the experimental and finite element verification, and good agreement has been found. It should be noted that the calculation result can be obtained rapidly and easily by this proposed model. Therefore, the present model is suitable for online application.
Suwen Chen; Jie Li; Xingxing Yuan; Dapeng Gu; Hongmin Liu. A fast calculation method of large-cylinder asymmetrical rolling force considering shear effect. Advances in Mechanical Engineering 2019, 11, 1 .
AMA StyleSuwen Chen, Jie Li, Xingxing Yuan, Dapeng Gu, Hongmin Liu. A fast calculation method of large-cylinder asymmetrical rolling force considering shear effect. Advances in Mechanical Engineering. 2019; 11 (1):1.
Chicago/Turabian StyleSuwen Chen; Jie Li; Xingxing Yuan; Dapeng Gu; Hongmin Liu. 2019. "A fast calculation method of large-cylinder asymmetrical rolling force considering shear effect." Advances in Mechanical Engineering 11, no. 1: 1.
The filling combination of polytetrafluoroethylene (PTFE)/Cu/Al2O3 filled poly(methyl methacrylate) (PMMA) based composites aiming at low friction and wear is optimized based on L9(34) by Taguchi method. The worn morphologies of PMMA based composites are analyzed by scanning electron microscopy (SEM). The PTFE transfer film and the wear debris on the steel ball surface are analyzed by SEM and X‐ray spectroscopy. It is observed that the friction and wear of PMMA can be obviously decreased by filling with PTFE, Cu, and Al2O3. PTFE has the most significant but Cu has the negligibly smallest contribution on both the friction coefficient and the wear rate. The lower friction coefficient (<0.2) appears by the combination of the mass ratio of PTFE larger than about 4.5% and the mass ratio of Al2O3 lower than ∼7.5%. The lower wear rate (<5 × 10−5 mm3/Nm) appears by the combination of the mass ratio of PTFE larger than about 5% and the mass ratio of Al2O3 lower than ∼8%, but it does not include that PTFE is greater than about 8.5% and Al2O3 is less than about 1.5%. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46705.
Dapeng Gu; Longxiao Zhang; Suwen Chen; Kefeng Song; Shouyao Liu. Optimization of PTFE/Cu/Al2 O3 filled PMMA based composites on tribological properties using Taguchi design method. Journal of Applied Polymer Science 2018, 135, 1 .
AMA StyleDapeng Gu, Longxiao Zhang, Suwen Chen, Kefeng Song, Shouyao Liu. Optimization of PTFE/Cu/Al2 O3 filled PMMA based composites on tribological properties using Taguchi design method. Journal of Applied Polymer Science. 2018; 135 (45):1.
Chicago/Turabian StyleDapeng Gu; Longxiao Zhang; Suwen Chen; Kefeng Song; Shouyao Liu. 2018. "Optimization of PTFE/Cu/Al2 O3 filled PMMA based composites on tribological properties using Taguchi design method." Journal of Applied Polymer Science 135, no. 45: 1.
Polytetrafluoroethylene/Poly(methyl methacrylate) (PTFE/PMMA) composite was prepared by mixing PTFE into PMMA matrix which synthesized by the PMMA powder mixture and methyl methacrylate (MMA) liquid mixture. The effects of the filling mass ratio of PTFE and powder/liquid (P/L) ratio on the friction and wear properties of PTFE/PMMA composites against bearing steel were studied by a ball-on-disk tribometer. Fourier transform infrared (FTIR), field emission scanning electron microscopy (FESEM), and energy dispersive X-ray spectroscopy (EDS) were used to characterize the synthesis of PTFE/PMMA composite. The shore hardness and glass transition temperature (Tg) were obtained respectively by shore hardness tester and differential scanning calorimetry (DSC). The results show that the friction coefficient and wear rate of PMMA based composite, comparing with the unfilled PMMA, can be significantly reduced by filling with PTFE. With the increasing of PTFE filling mass ratio, the wear rate of PTFE/PMMA composite increases. The friction coefficient and wear rate of the unfilled PMMA and PTFE/PMMA composite generally decrease with the P/L ratio increasing. The main wear mechanism of the unfilled PMMA is adhesive wear. While the main wear mechanisms of PTFE/PMMA composites are fatigue wear and abrasive wear.
Dapeng Gu; Longxiao Zhang; Suwen Chen; Kefeng Song; Shouyao Liu. Significant Reduction of the Friction and Wear of PMMA Based Composite by Filling with PTFE. Polymers 2018, 10, 966 .
AMA StyleDapeng Gu, Longxiao Zhang, Suwen Chen, Kefeng Song, Shouyao Liu. Significant Reduction of the Friction and Wear of PMMA Based Composite by Filling with PTFE. Polymers. 2018; 10 (9):966.
Chicago/Turabian StyleDapeng Gu; Longxiao Zhang; Suwen Chen; Kefeng Song; Shouyao Liu. 2018. "Significant Reduction of the Friction and Wear of PMMA Based Composite by Filling with PTFE." Polymers 10, no. 9: 966.
Orientations and weaves played an important role in the friction reduction and antiwear properties of PTFE/Kevlar fabric composite.
Dapeng Gu; Longxiao Zhang; Suwen Chen; Kefeng Song; Shouyao Liu. Reciprocating sliding wear of hybrid PTFE/Kevlar fabric composites along different orientations. RSC Advances 2018, 8, 20877 -20883.
AMA StyleDapeng Gu, Longxiao Zhang, Suwen Chen, Kefeng Song, Shouyao Liu. Reciprocating sliding wear of hybrid PTFE/Kevlar fabric composites along different orientations. RSC Advances. 2018; 8 (37):20877-20883.
Chicago/Turabian StyleDapeng Gu; Longxiao Zhang; Suwen Chen; Kefeng Song; Shouyao Liu. 2018. "Reciprocating sliding wear of hybrid PTFE/Kevlar fabric composites along different orientations." RSC Advances 8, no. 37: 20877-20883.
Polytetrafluoroethylene (PTFE)/Kevlar fabric or fabric composites with excellent tribological properties have been considered as important materials used in bearings and bushing, for years. The components’ (PTFE, Kevlar, and the gap between PTFE and Kevlar) distribution of the PTFE/Kevlar fabric is uneven due to the textile structure controlling the wear process and behavior. The components’ area ratio on the worn surface varying with the wear depth was analyzed not only by the wear experiment, but also by the theoretical calculations with our previous wear geometry model. The wear process and behavior of the PTFE/Kevlar twill fabric were investigated under dry sliding conditions against AISI 1045 steel by using a ring-on-plate tribometer. The morphologies of the worn surface were observed by the confocal laser scanning microscopy (CLSM). The wear process of the PTFE/Kevlar twill fabric was divided into five layers according to the distribution characteristics of Kevlar. It showed that the friction coefficients and wear rates changed with the wear depth, the order of the antiwear performance of the previous three layers was Layer III>Layer II>Layer I due to the area ratio variation of PTFE and Kevlar with the wear depth.
Dapeng Gu; BingLi Fan; Fei Li; Yulin Yang; Suwen Chen. Wear Process Analysis of the Polytetrafluoroethylene/Kevlar Twill Fabric Based on the Components’ Distribution Characteristics. Autex Research Journal 2017, 17, 295 -302.
AMA StyleDapeng Gu, BingLi Fan, Fei Li, Yulin Yang, Suwen Chen. Wear Process Analysis of the Polytetrafluoroethylene/Kevlar Twill Fabric Based on the Components’ Distribution Characteristics. Autex Research Journal. 2017; 17 (4):295-302.
Chicago/Turabian StyleDapeng Gu; BingLi Fan; Fei Li; Yulin Yang; Suwen Chen. 2017. "Wear Process Analysis of the Polytetrafluoroethylene/Kevlar Twill Fabric Based on the Components’ Distribution Characteristics." Autex Research Journal 17, no. 4: 295-302.
Xiaobao Ma; Hongmin Liu; Jianliang Sun; Zhizhong Zhang; Suwen Chen. Impact of main drive system of 5 m wide and heavy plate mill on screw-down load deviation. Engineering Failure Analysis 2017, 79, 913 -927.
AMA StyleXiaobao Ma, Hongmin Liu, Jianliang Sun, Zhizhong Zhang, Suwen Chen. Impact of main drive system of 5 m wide and heavy plate mill on screw-down load deviation. Engineering Failure Analysis. 2017; 79 ():913-927.
Chicago/Turabian StyleXiaobao Ma; Hongmin Liu; Jianliang Sun; Zhizhong Zhang; Suwen Chen. 2017. "Impact of main drive system of 5 m wide and heavy plate mill on screw-down load deviation." Engineering Failure Analysis 79, no. : 913-927.
Hongmin Liu; Suwen Chen; Yan Peng; Jianliang Sun. Strip layer method for analysis of the three-dimensional stresses and spread of large cylindrical shell rolling. Chinese Journal of Mechanical Engineering 2015, 28, 556 -564.
AMA StyleHongmin Liu, Suwen Chen, Yan Peng, Jianliang Sun. Strip layer method for analysis of the three-dimensional stresses and spread of large cylindrical shell rolling. Chinese Journal of Mechanical Engineering. 2015; 28 (3):556-564.
Chicago/Turabian StyleHongmin Liu; Suwen Chen; Yan Peng; Jianliang Sun. 2015. "Strip layer method for analysis of the three-dimensional stresses and spread of large cylindrical shell rolling." Chinese Journal of Mechanical Engineering 28, no. 3: 556-564.
Large cylindrical shell rolling is an advanced plastic-forming technique that has unequal speed and radius of both its upper and lower rolls. A theoretical model for a large cylindrical shell rolling that is based on the slab method is proposed, in which the non-uniform normal and shear stresses that act on the vertical sides are considered. A mixed friction model of combined Coulomb and sticking friction is used to present interface friction, to improve the accuracy of the proposed model. The rolling pressure, rolling force, and torque as well as friction stress can be rapidly and easily calculated through the proposed model at different rolling conditions. The predicted rolling force is consistent with the experimental result. The research results provide valuable guidelines for both the design and optimization of rolling product, process, and equipment.
Suwen Chen; Hongmin Liu; Yan Peng; Jianliang Sun. Slab analysis of large cylindrical shell rolling considering mixed friction. Journal of Mechanical Science and Technology 2014, 28, 4753 -4760.
AMA StyleSuwen Chen, Hongmin Liu, Yan Peng, Jianliang Sun. Slab analysis of large cylindrical shell rolling considering mixed friction. Journal of Mechanical Science and Technology. 2014; 28 (11):4753-4760.
Chicago/Turabian StyleSuwen Chen; Hongmin Liu; Yan Peng; Jianliang Sun. 2014. "Slab analysis of large cylindrical shell rolling considering mixed friction." Journal of Mechanical Science and Technology 28, no. 11: 4753-4760.
The paper g describes a model meant for analysis of the wear geometry of plain woven fabric composites. The referred model consists of a mathematical description of plain woven fabric based on Peirce’s model coupled with a stratified method for the solution of the wear geometry. The evolutions of the wear area ratio of weft yarn, warp yarn and matrix resin on the worn surface are simulated by MatLab software in combination of warp and weft yarn diameters, warp and weft yarn-to-yarn distances, fabric structure phases (SPs). By comparing theoretical and experimental results from the PTFE/Kevlar fabric wear experiment, it can be concluded that the model can present a trend of the component area ratio variations along with the thickness of fabric, but has a inherently large error in quantitative analysis as an idealized model.
Dapeng Gu; Yulin Yang; Suwen Chen; Wenwen Su. A Wear Geometry Model of Plain Woven Fabric Composites. Autex Research Journal 2014, 14, 168 -173.
AMA StyleDapeng Gu, Yulin Yang, Suwen Chen, Wenwen Su. A Wear Geometry Model of Plain Woven Fabric Composites. Autex Research Journal. 2014; 14 (3):168-173.
Chicago/Turabian StyleDapeng Gu; Yulin Yang; Suwen Chen; Wenwen Su. 2014. "A Wear Geometry Model of Plain Woven Fabric Composites." Autex Research Journal 14, no. 3: 168-173.
Su-Wen Chen; Hong-Min Liu; Yan Peng; Jian-Liang Sun. Strip layer method for simulation of the three-dimensional deformations of large cylindrical shell rolling. International Journal of Mechanical Sciences 2013, 77, 113 -120.
AMA StyleSu-Wen Chen, Hong-Min Liu, Yan Peng, Jian-Liang Sun. Strip layer method for simulation of the three-dimensional deformations of large cylindrical shell rolling. International Journal of Mechanical Sciences. 2013; 77 ():113-120.
Chicago/Turabian StyleSu-Wen Chen; Hong-Min Liu; Yan Peng; Jian-Liang Sun. 2013. "Strip layer method for simulation of the three-dimensional deformations of large cylindrical shell rolling." International Journal of Mechanical Sciences 77, no. : 113-120.