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采用挤压浸渍预制件工艺制备了氧化铝短纤维增强镁基复合材料,并探讨了纤维取向对润滑条件下复合材料摩擦磨损行为的影响.结果表明:挤压浸渍工艺制备的镁基复合材料具有纤维二维择向分布,不同纤维分布对复合材料在润滑条件下的耐磨性能和磨损机制有较大影响.滑动方向垂直于纤维排列方向时,复合材料的磨痕深度小于平行方向,但相对应的钢球的磨损量则高于平行方向.滑动方向垂直于纤维排列方向时复合材料的磨损机制主要包括纤维破碎和基体的磨粒磨损;滑动方向平行于纤维排列方向时复合材料的磨损机制主要表现为纤维剥落和磨粒磨损.
The effect of fiber orientation on friction and wear behavior of composite under lubrication condition was investigated by extrusion-impregnated preform technology. The results show that the magnesium matrix composite prepared by extrusion impregnation has Fiber two-dimensional orientation distribution, different fiber distribution on the wear resistance and wear mechanism of the composite under lubrication conditions have a greater impact.When the sliding direction perpendicular to the fiber arrangement direction, the wear scar depth of the composite material is less than the parallel direction, but the phase The wear volume of the corresponding steel ball is higher than that of the parallel direction.The wear mechanism of the composite material when the sliding direction is perpendicular to the fiber arrangement direction mainly includes the fiber breakage and abrasive wear of the substrate; the wear mechanism of the composite material when the sliding direction is parallel to the fiber alignment direction Mainly for the fiber flaking and abrasive wear.