关键词: 氧化铝, 铝, 层状复合材料, 环氧树脂, 模压

Abstract:

Laminated Al₂O₃/Al ceramic composites were successfully fabricated via a simple molding process at room temperature and 5 MPa,with epoxy resin adhesives as the hinder.Then,the bond strengths of the adhesives with various mass ratios of epoxy resin to hardener,namely 1:0.7,1:0.8,1:0.9 and 1:1.0,were investigated.The resuhs indicate that the bond strength reaches its maximum when the mass ratio is 1:0.8,and that,when A1 foils with their surface ground in different directions are added in the lap joints,the unidirectional grinding may result in higher bond strength.Microstructure analysis results show that the interfaces of Al₂ O₃/epoxy/Al bond tightlv. Moreover,mechanical test results show that,as compared with Al₂ O₃ monolith,the fabricated composites haye a slightly lower bending strength but much higher fracture toughness and fracture work,which is attributed to the multiple fractures occurring during the crack propagation.

Key words: aluminum oxide, aluminum, laminated composites, epoxy resin, mould pressing