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Tribological Properties of sic/cu composite at High Temperature

Journal of Wuhan University of Technology(Materials Science) 2009年第6期24卷 888-891页

作者：范冰冰张锐 Zhengzhou Institute of Aeronautical Industry Management School of Materials Science & Engineering Zhengzhou University

sic/cu composites were prepared by hot pressing. The high temperature tribological properties of the composites were investigated. XRD, SEM techniques were carried out to characterize the samples. It is found that the friction coefficient of sic/cu composites increases with the increasing sic content. The sic reinforcement particles are worn down other than removed by pulling out during the wear test. Oxidation of cu debris leads to the smooth contacting surface. Ring crack is formed under the cyclic wear test. The crack propagates through the damaged matrix and along the brittle interface between sic particles and cu matrix.

关键词： sic/cu composite tribological properties high temperature wear ring crack

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Fabrication and Mechanical Properties of sic/cu composites with Zn Addition by Hot Pressing Sintering

Fabrication and Mechanical Properties of SiC/Cu Composites w...

引用

中国材料大会2012

作者： Huang Liu Guoqiang Luo Pingan Chen Qiang Shen Lianmeng Zhang State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Key Laboratory of Advanced Technology for Specially Functional Materials Ministry of Education Wuhan University of Technology

ISBN: (纸本)9783037856079;3037856076

sic/cu composites exhibit low density, low coefficient of thermal expansion and excellent mechanical properties. In this study, Zn of 2 wt. % was added as the sintering activator, and the high volume faction （60%） sic/cu composites was fabricated by hot pressing sintering technology. The phase composition and morphology of as-prepare samples were characterized by X-ray diffraction （XRD） system and scanning electron microscopy （SEM） equipped with an energy-dispersive spectroscopy （EDS） system. The as-prepared sic/cu composites were dense and uniform as well as void free. The results show that sic/cu composites can reach excellent mechanical properties of sic/cu composites. With the increase of sintering temperature, Vickers hardness and the bending strength of the samples increased obviously and the as-prepared sic/cu composites achieved a maximum Vickers hardness and bending strength respectively of 195MPa and 140MPa.

关键词： sic/cu composite Hot pressing sintering Mechanical properties Interface.

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