(四川联合大学金属材料系， 成都 610065)
摘 要: 用中断挤压铸造法研究了ZL109合金液在莫来石纤维预制块中的流动状况。 发现微观上流动前沿存在许多合金液的“包抄”， 这种包抄可能导致孔洞的形成； 讨论了复合材料中孔洞的形成模型， 分析了预制块中纤维间最小间隙在形成孔洞中的作用。
关键字: 挤压浸渗 合金液包抄 孔隙
（Department of Metal Materials, Sichuan Union University, Chengdu 610065, P. R. China）
Abstract:The flow front of ZL109 melt in mullite chopped fibre preform during melt infiltration was investigated with a method called stopping squeeze casting. It was found that there are a number of “outflankings” in the flow front, which can result in the formation of pores in the composite. A modeling of pore forming and the influence of the minimum interspaces on pore forming was analyzed and discussed also.
Key words: infiltration by squeeze casting outflanking of melt pore in composite
