中国铸造2009，Vol.6Issue(1)：1-8,8.
Friction and wear properties of casting in-situ silicon particle reinforced ZA27 composites
Friction and wear properties of casting in-situ silicon particle reinforced ZA27 composites
摘要
Abstract
The effects of silicon particle content and testing temperature on friction and wear properties of casting in-situ silicon particle reinforced ZA27 composites were investigated. The wear mechanisms were mainly discussed by observations of both worn surfaces and their side views. The results indicated that the variations of wear resistance with increasing of silicon particle content, at all of the testing temperatures applied, showed a similar tendency with a manner of non-monotonous change. It was surpdsed that the wear resistance decreased with the increase of silicon particle content from 2 vol.% to 5 vol.%, while it increased when the content was less than 2 vol.% or more than 5 vol.%. Similarly, the friction coefficient also did not change monotonously. The dominative wear mechanism changed from a relatively severe regime of plastic deformation accompanied by adhesion wear to a mild regime of smear, then to a very severe regime of severe plastic deformation induced wear, and finally again to a relatively mild regime of smear accompanied by abrasive wear as the silicon content increased. The wear resistance always decreased with elevating testing temperature, but the decrease ranges were different for the composites with different silicon contents. The friction coefficients changed irregularly for the different composites with the increase of testing temperature. Correspondingly, the wear mechanism alternated from a mild regime of smear accompanied by abrasive wear to a severe regime of plastic deformation accompanied by adhesion wear.关键词
in-situ composite/ silicon particle/ friction and wear/ wear mechanism/ hardnessKey words
in-situ composite/ silicon particle/ friction and wear/ wear mechanism/ hardness分类
矿业与冶金引用本文复制引用
Chen Tijun,Yuan Chengren,Fu Mingfeng,Ma Ying,Li Yuandong,Hao Yuan..Friction and wear properties of casting in-situ silicon particle reinforced ZA27 composites[J].中国铸造,2009,6(1):1-8,8.基金项目
This work was supported by the Doctor Foundation of Lanzhou University of Technology （）
