Abstract: SiC / Ta coating was prepared on the surface of electromechanical transmission shaft by double glow plasma technology. The effect of reaction gas tetramethylsilane on the microstructure and wear resistance of the coating was studied. The results show that the cross-section of the composite coating with different H2 / TMS flow rates is the double-layer structure of the surface SiC layer and the TA transition layer. The thickness of the cross-section of the coating is between 4.8 and 6 μ M. when the TMS flow rate reaches 1.5 SCCM, the SiC coating and the TA transition layer are relatively dense and well bonded. The 4Cr13 matrix phase is mainly Fe Cr, while the Fe Cr diffraction peak of the composite coating with different H2 / TMS flow rates is outside, There are also diffraction peaks of TAC / SiC, ta2c and ta2c / SiC. The wear mark width, depth and specific wear rate of the matrix are 860 μ m, 15.91 μ m and 102 × 10-5mm3 / N · m, respectively. The wear mark width, depth and specific wear rate of the composite coating with different H2 / TMS flow rate ratio are lower than that of the matrix. When TMS flow rate is 1.5 SCCM, the wear mark width, depth and specific wear rate of the composite coating are the smallest. The SiC composite coating prepared by double glow plasma technology on the surface of the mechanical and electrical transmission shaft is helpful to improve the wear resistance of the matrix. When the TMS flow rate is 1.5 SCCM, the structure of the composite coating is denser, the friction coefficient is lower, and the wear resistance is relatively better. Keywords: double glow plasma; SiC composite coating; morphology; wear resistance;
Article source: China ceramics, issue 7, 2019
Author: Xie Yanyan, Wang Rong, Hu Yanhua
Setting: Inner Mongolia Institute of mechanical and electrical technology; Inner Mongolia University of Technology
Fund Project: Inner Mongolia natural fund (2017ms0805); national natural fund project (50761006);