摘要
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。
The mullite short fibre reinforced Al matrix composites with the same volume fraction of fibre and different matrixes were fabricated by squeeze casting with different maintaining pressures for solidification, and the ultimate tensile strength (UTS) of the composites were tested. It is found that the UTS rose with the increase of the maintaining pressure for solidification. The relationship between the dimension of the air hole and the pressure for solidification has been discussed, and the factors resulting in growth of the air hole in a mullite/ZL109 composites in the process of the heat treatment have been analyzed. It is suggested that the pressure for solidification mostly affected the early and last dimension of the air holes, and the last dimension of the air hole played an important role for the UTS of the mullite short fibre reinforced Al matrix composites.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
1999年第4期744-747,共4页
The Chinese Journal of Nonferrous Metals
基金
国家自然科学基金!资助项目59631080
