Influence of nano-Al2O3-reinforced oxide-dispersion-strengthened Cu on the mechanical and tribological properties of Cu-based composites
来源期刊：International Journal of Minerals Metallurgy and Materials2016年第12期
论文作者：Xiang Zhao Lei-chen Guo Long Zhang Ting-ting Jia Cun-guang Chen Jun-jie Hao Hui-ping Shao Zhi-meng Guo Ji Luo Jun-bin Sun
文章页码：1444 - 1451
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.
Xiang Zhao1,2，Lei-chen Guo3，Long Zhang1，Ting-ting Jia1，Cun-guang Chen1，Jun-jie Hao1，Hui-ping Shao1，Zhi-meng Guo1，Ji Luo1，Jun-bin Sun4
1. Institute for Advanced Materials and Technology, University of Science and Technology Beijing2. Beijing BeiMoGaoKe Friction Material Co.,Ltd.3. School of Engineering Technology, Purdue University4. Health Policy and Research Department, Weill Cornell Medical College
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.
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