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采用放电等离子烧结技术制备了Ti3Si C2-Ag复合材料,研究了其在室温下与Si3N4、Al2O3、Si C等摩擦配副对摩时的摩擦磨损性能,并与纯Ti3Si C2材料在相同摩擦配副条件下的摩擦磨损性能进行了对比。运用扫描电子显微镜、X射线光电子能谱仪等对磨损表面的形貌组织和元素价态等进行了表征分析,并探讨了摩擦磨损机理。结果表明:摩擦配副材料的不同对Ti3Si C2-Ag复合材料的摩擦磨损行为有显著影响,Ti3Si C2-Ag复合材料与Si C和Si3N4对摩时,磨损率均较低,尽管存在晶粒拔出等机械磨损,但Ti O2和Si Ox等摩擦氧化膜的形成有效地抑制了晶粒拔出并起到了减摩作用;Ti3Si C2-Ag复合材料与Al2O3对摩时磨损率则较高,以脆性断裂、晶粒拔出为主的机械磨损是该摩擦副的主要磨损机制。Ti3Si C2材料与Si3N4和Al2O3对摩时,包含脆性断裂、晶粒拔出、脱落以及磨粒磨损在内的机械磨损是其主要的磨损机制;Ti3Si C2材料与Si C对摩时,磨损表面的塑性变形和氧化膜起到了抑制晶粒拔出的作用,使得Ti3Si C2的磨损率相对较低。
The friction and wear properties of Ti3Si C2-Ag composites prepared by spark plasma sintering were studied. The tribological properties of Ti3Si C2-Ag composites were studied at room temperature when they were rubbed with Si3N4, Al2O3, SiC and the like. Under the conditions of friction and wear performance were compared. The morphology, microstructure and atomic valence of the worn surface were characterized by scanning electron microscopy and X-ray photoelectron spectroscopy. The friction and wear mechanism were also discussed. The results show that the tribological properties of Ti3Si C2-Ag composites are significantly affected by the different tribological materials. The wear rates of Ti3Si C2-Ag composites with Si C and Si3N4 are low, However, the formation of frictional oxide films such as Ti O2 and Si Ox effectively inhibited the grain pull-out and played a role of anti-friction. The wear rate of Ti3Si C2-Ag composites with Al2O3 was higher Mechanical wear mainly caused by brittle fracture and grain pullout is the main wear mechanism of the friction pair. Ti3Si C2 material with Si3N4 and Al2O3 on the friction, including brittle fracture, grain pull-out, wear and tear, including the mechanical wear and tear are the main wear mechanism; Ti3Si C2 material and Si C friction, wear the surface Plastic deformation and oxide film play a role in inhibiting the pull-out of the grain, making the wear rate of Ti3Si C2 relatively low.