摘要
本文使用线性摩擦试验机研究Ti_(3)(Al_(1.2-x)Sn_(x))C_(2)(x=0,0.1,0.3,0.5)固溶体在宽温域下的摩擦磨损行为。结果表明:在RT~1000℃的宽温域范围内,Ti_(3)(Al_(1.2-x)Sn_(x))C_(2)(x=0.1,0.3,0.5)的摩擦系数和磨损率小于Ti_(3)(Al_(1.2-x)Sn_(x))C_(2),这表明Sn的固溶强化作用显著改善了材料的摩擦性能。在室温下,Ti_(3)(Al_(1.2-x)Sn_(x))C_(2)的磨损机制为磨粒磨损、粘着磨损和疲劳磨损;随着温度升高至400~600℃,材料的磨损机制转变为以粘着磨损和疲劳磨损为主导;最终在800~1000℃下,磨损机制转变为粘着磨损和氧化磨损。在高温摩擦过程中,材料表面的SnO_(2)、SiO_(2)、TiO_(2)及Al_(2)O_(3)氧化膜不仅能抵御外界的腐/侵蚀以及因摩擦导致的进一步磨损,还能提升材料的耐磨性和自润滑性能。
In this paper,a linear friction testing machine was employed to investigate the friction and wear behaviors of Ti_(3)(Al_(1.2-x)Sn_(x))C_(2)(x=0,0.1,0.3,0.5)solid solutions within a wide temperature range.The results demonstrated that within the wide temperature range from room temperature of 800 to 1000℃,the friction coefficients and wear rates of Ti_(3)(Al_(1.2-x)Sn_(x))C_(2)(x=0.1,0.3,0.5)were lower than those of Ti_(3)(Al_(1.2-x)Sn_(x))C_(2),indicating that the solid solution strengthening effect of Sn significantly improved the friction performance of the materials.At room temperature,the wear mechanism of Ti_(3)(Al_(1.2-x)Sn_(x))C_(2)was a combination of abrasive wear,adhesive wear,and fatigue wear.As the temperature increased to the range of 400~600℃,the wear mechanism of the materials transformed into being dominated by adhesive wear and fatigue wear.Eventually,within the temperature range of 800~1000℃,the wear mechanism changed to adhesive wear and oxidative wear.During the high-temperature friction process,the SnO_(2),SiO_(2),TiO_(2)and Al_(2)O_(3)oxide films on the surface of the materials could not only resist external corrosion/erosion and further wear caused by friction but also enhance the wear resistance and self-lubricating properties of the materials.
作者
吴沛宸
刘颖
WU Peichen;LIU Ying(College of Materials Science and Engineering,Sichuan University,Chengdu 610065,Sichuan,China)
出处
《四川冶金》
2025年第3期43-48,共6页
Sichuan Metallurgy
