Abstract (Ti-8Si)-xCu (x=0, 5, 10 and 20%) alloy were prepared by powder metallurgy method using Ti, Si and Cu powder as raw materials. The effects of Cu content on the hardness and friction and wear properties at room temperature of Ti-8Si alloy were studied through hardness testing, room temperature dry sliding friction test and observation and analysis of the friction surface morphology and element composition. The results show that, adding Cu powder can improve the hardness of Ti-8Si alloy. The hardness of (Ti-8Si)-5Cu alloy is the highest, HV reaches 1 434.4, which is 40.4% higher than that of Ti-8Si alloy (1 021.5). The surface hardness of (Ti-8Si)-10Cu is almost equal to that of (Ti-8Si)-20Cu alloy, and HV is 1 180.9 and 1 171.9 respectively. The friction coefficient of the alloy increases from 0.36 to 0.6 by adding Cu. However, adding the appropriate amount of Cu can obviously improve the wear resistance of the alloy, and the volume wear volume (0.014 3 mm3) of 95 (Ti-8Si)-5Cu alloy is about half of the Ti-8Si alloy (0.026 2 mm3). The wear volume of (Ti-8Si)-10Cu alloy is reduced by 13.7% than Ti-8Si alloy. The wear volume of the (Ti-8Si)-20Cu alloy increases sharply to 2.5 times that of the Ti-8Si alloy. The wear forms of 95 (Ti-8Si)-5Cu alloy are mainly abrasive wear and adhesive wear, accompanied by slight oxidation wear. The other 3 alloys are mainly fatigue wear and oxidation wear, with a certain degree of abrasive wear and adhesive wear.
ZHAO Qian,XU Xiaojing,RU Jinming, et al. Effects of Cu content on friction and wear behavior of (Ti-8Si)-xCu alloy[J]. Materials Science and Engineering of Powder Metallurgy, 2018, 23(2): 222-228.
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2018, Vol. 23 
