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中文摘要：
研究了超声原位制备的Al3Ti/7075铝基复合材料在不同载荷和滑动摩擦速度下的干摩擦磨损性能。采用SEM对磨损面和磨屑显微组织进行观察与分析,讨论了不同载荷下材料的磨损机制。结果表明：基体和复合材料磨损质量损失随着滑动摩擦速度和载荷的增加而增加。基体和复合材料都是从轻微磨损向严重磨损转化。当载荷为10～30N时,基体和复合材料表现为擦伤磨损的特征;当载荷为120N时,基体和复合材料表现为剥层磨损的特征,基体的磨损质量损失与铝基复合材料相比尤为严重;在此条件下,复合材料与基体相比磨损性能增加了14.6%～18%。
英文摘要：
The dry sliding friction and wear properties for ultrasound in situ prepared Al3Ti/7075 aluminum matrix composites were studied at different loads and sliding speeds.Using SEM to observe and analyse the microstructure of wear surface and wear debris,the wear mechanism of materials under different loads was discussed.The results show that the wear quality loss of matrix and composite material with sliding friction speed and load is increased.The matrix and composite material are transformed from mild wear to severe wear abrasion.When the load is 10-30 N,the matrix and composite material are characterized by scouring abrasion;when the load is 120 N,the matrix and composite material are characterized by delamination wear,and the wear quality loss of matrix is particularly serious compared with aluminum matrix composites.Under these conditions,the wear performance of composites increases by 14.6%-18% compared to the matrix.
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