Diffusion bonding mechanism and microstructure of welded joint of aluminium matrix composite Al₂O_3p/6061

来源期刊：中国有色金属学报(英文版)1999年第4期

论文作者：刘黎明 牛济泰 田艳红 孟晓东

文章页码：826 - 830

Key words：aluminium matrix composite; oxide; welded joints; microstructure

Abstract: Relationships between microstructures of welded joint and welding parameters or weld strength of aluminium matrix composite Al₂O_3p/6061 subjected to diffusion welding were studied. The results are as follows: key factor affecting strength of welded joint is oxide in the weld zone. The existence of oxide in the welded joint not only hinders the diffusion of the matrix atoms, but also destroys the good interface between the matrix and the reinforced phase. The oxides turn into fine particles from film with increasing welding temperature, and the destroying effect on welded joint decreases, which increases the strength of the welded joint. On the basis of this, the diffusion welding of aluminium matrix composite Al₂O_3p/6061 was successfully