论文部分内容阅读
运用挤压铸造工艺中不同的保压压强：６ ＭＰａ，３０ ＭＰａ ，６０ ＭＰａ ，１１０ ＭＰａ 和１５６ ＭＰａ 制备３种相同纤维体积分数的莫来石短纤维增强铝基复合材料， 并测定其拉伸强度。不同基体的复合材料拉伸强度均随保压压强增高而提高。讨论了莫来石短纤维／ＺＬ１０９ 复合材料残余空洞尺寸与保压压强的关系和残余空洞在Ｔ６ 处理过程中的长大现象及原因。结果表明， 气孔类残余孔洞初始尺寸和最终尺寸与保压压强有关， 并显著影响莫来石短纤维增强铝基复合材料的拉伸强度。
Three kinds of mullite short fiber reinforced aluminum matrix composites with the same fiber volume fraction were prepared at different packing pressures of 6 MPa, 30 MPa, 60 MPa, 110 MPa and 156 MPa. The tensile tests strength. The tensile strength of composites with different substrates increased with the increase of dwell pressure. The relationship between the residual void size of mullite staple fiber / ZL109 composite material and the holding pressure and the growth of residual void during T6 treatment were discussed. The results show that the initial size and the final size of residual pores in stomata are related to the holding pressure and significantly affect the tensile strength of mullite short fiber reinforced aluminum matrix composites.