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王振国,毕衍泽,李岩,蔡海娇.SiC和Al2O3颗粒对Ti-25Nb-3Mo-3Zr-2Sn合金微磨损行为的影响[J].稀有金属材料与工程(英文),2019,48(5):1421~1428.[Wang Zhenguo,Bi Yanze,Li Yan and Cai haijiao.Effects of SiC and Al2O3 particles on micro-abrasion behavior of Ti-25Nb-3Mo-3Zr-2Sn alloy[J].Rare Metal Materials and Engineering,2019,48(5):1421~1428.]
Effects of SiC and Al2O3 particles on micro-abrasion behavior of Ti-25Nb-3Mo-3Zr-2Sn alloy
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Received:December 18, 2017  Revised:January 08, 2018
Key words: micro-abrasion  abrasive particles  biomaterial  Ti-25Nb-3Mo-3Zr-2Sn  synergistic effect
Foundation item:中国博士后科学基金(2016M591040);国家自然科学基金-青年项目(51401027)
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Wang Zhenguo,Bi Yanze,Li Yan and Cai haijiao  
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      The effects of SiC and Al2O3 abrasive particles on micro-abrasion behavior of a biomaterial Ti-25Nb-3Mo-3Zr-2Sn alloy in Hank’s solution was investigated. The effects of particle size and type were considered. The specific wear rate, friction coefficient, wear mechanism and the synergistic effect between the micro-abrasion and corrosion were studied. The results showed that the specific wear rates increased with an increase in the particle size. Due to the hardness and machinability of SiC particle is higher, the material loss caused by the SiC particle is greater than the Al2O3 particle under the same size. The average friction coefficients obtained in Hank’s solution are larger than those in distilled water for the SiC particle; however, the Al2O3 particle is just the opposite. For the same particle size, the average friction coefficients acquired by the Al2O3 particle is larger than the SiC particle. Due to the corrosivity of Hank’s solution, the stability of the friction coefficient in Hank’s solution is poor compared to that of distilled water. With a decrease of the particle size, the wear mechanism changed from a three-body rolling abrasion to a mixed mode and finally to a two-body grooving abrasion. The mechanistic map of the AC-PA against the PA illustrated that the contribution of corrosion to the total material loss cannot be ignored, and the main regime is abrasion-corrosion.