Transient liquid phase bonding of Al₂O_3P/6061Al metal matrix composite

The joint of transient liquid phase bonding of particle reinforced aluminium-based metal matrix composite with a pure metal interlayer contains a particle segregation region, which is deleterious to the joint strength.Decreasing particle segregation is one of effective approaches improving mechanical properties of the joint. The microstructure and mechanical property of aluminium-based metal matrix composite Al₂O_3P/6061Al joint by transient liquid phase bonding with Al/Cu/Al or Cu/Al/Cu multi-layer interlayer have been investigated.The experimental results show that bonding with the multi-layer interlayer is able to control the particle segregation region and improve the joint strength.Under the bonding condition of 600℃/60 min, with 10 μm Al/10 μm Cu/10 μm Al multi-layer interlayer, the particle segregation region is not evident in the joint, and the shear strength of the joint is 110MPa;with 1.5 μm Cu/10 μm Al/1.5 μm Cu multi-layer interlayer, the particle segregation region is invisible in the joint, and the shear strength of the joint is further increased to 123MPa.