HU Bin1,2*, PENG Liming1, DING Wenjiang1
(1. National Engineering and Research Center of Light Alloy Forming, Shanghai JiaoTong University, Shanghai 200240, China 2. State Key Laboratory of Metal Matrix Composites, Shanghai JiaoTong University, Shanghai 200240, China)
Abstract: Magnesium matrix composites reinforced by short fibers were prepared by the squeeze-casting infiltration process, and the effect of fiber distribution on the wear properties were discussed. The fibers in magnesium matrix composites were two-dimensional (2-D) distributed after infiltration process, and the composites in different direction exhibited different tribological property. Composite in parallel direction has a deeper worn track than that in perpendicular direction, but the volumetric wear loss of the counter-part (steel ball) by the composite in parallel direction is lower than that of perpendicular direction. The controlling wear mechanism of the composite in perpendicular direction includes: fracture of fibers and abrasive wear of matrix. The pull out and abrasive wear of matrix are the wear mechanism for the composite in parallel direction.
Key words: magnesium matrix composites; fiber orientation; tribological
E-mail: binhu@sjtu.edu.cn
Tribology, Vol. 30, Issue 6, 2010, 537~542
