Influence of nano-Al2O3-reinforced oxide-dispersion-strengthened Cu on the mechanical and tribological properties of Cu-based composites

被引:11
作者
Zhao, Xiang [1 ,2 ]
Guo, Lei-chen [3 ]
Zhang, Long [1 ]
Jia, Ting-ting [1 ]
Chen, Cun-guang [1 ]
Hao, Jun-jie [1 ]
Shao, Hui-ping [1 ]
Guo, Zhi-meng [1 ]
Luo, Ji [1 ]
Sun, Jun-bin [4 ]
机构
[1] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Beijing 100083, Peoples R China
[2] Beijing BeiMoGaoKe Frict Mat Co Ltd, Beijing 102206, Peoples R China
[3] Purdue Univ, Sch Engn Technol, W Lafayette, IN 47907 USA
[4] Weill Cornell Med Coll, Hlth Policy & Res Dept, New York, NY 10031 USA
基金
国家高技术研究发展计划(863计划);
关键词
metal matrix composites; oxide dispersion strengthening; copper; nanoparticles; microstructure; mechanical properties; tribological properties; BRAKE PAD; TRIBO-PERFORMANCE; LINING MATERIALS; WEAR BEHAVIOR; FRICTION; FE;
D O I
10.1007/s12613-016-1368-z
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The mechanical and tribological properties of Cu-based powder metallurgy (P/M) friction composites containing 10wt%-50wt% oxide-dispersion-strengthened (ODS) Cu reinforced with nano-Al2O3 were investigated. Additionally, the friction and wear behaviors as well as the wear mechanism of the Cu-based composites were characterized by scanning electron microscopy (SEM) in conjunction with energy-dispersive X-ray spectroscopy (EDS) elemental mapping. The results indicated that the Cu-based friction composite containing 30wt% ODS Cu exhibited the highest hardness and shear strength. The average and instantaneous friction coefficient curves of this sample, when operated in a high-speed train at a speed of 300 km/h, were similar to those of a commercial disc brake pad produced by Knorr-Bremse AG (Germany). Additionally, the lowest linear wear loss of the obtained samples was (0.008 +/- 0.001) mm per time per face, which is much lower than that of the Knorr-Bremse pad ((0.01 +/- 0.001) mm). The excellent performance of the developed pad is a consequence of the formation of a dense oxide composite layer and its close combination with the pad body.
引用
收藏
页码:1444 / 1451
页数:8
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