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残余孔洞对莫来石短纤维/ZL109复合材料强度的影响
引用本文:赵平,高升吉.残余孔洞对莫来石短纤维/ZL109复合材料强度的影响[J].中国有色金属学报,1999,9(4):744-747.
作者姓名:赵平  高升吉
作者单位:四川大学金属材料系!成都610065
基金项目:国家自然科学基金!资助项目59631080
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。

关 键 词:莫来石纤维/ZL109复合材料  残余孔洞  抗拉强度

Influence of residual holes on tensile strength of mullite short fibre/ZL109 composites
Zhao Ping,Gao Shengji,Shen Baoluo,Tu Mingjing.Influence of residual holes on tensile strength of mullite short fibre/ZL109 composites[J].The Chinese Journal of Nonferrous Metals,1999,9(4):744-747.
Authors:Zhao Ping  Gao Shengji  Shen Baoluo  Tu Mingjing
Affiliation:Zhao Ping,Gao Shengji,Shen Baoluo,Tu Mingjing Department of Metal Materials,Sichuan University,Chengdu 610065
Abstract: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.
Keywords:Mullite/ZL109 composite  residual air hole  ultimate tensile strength  
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