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.

• 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。