Effect of ZrO2 Nanomaterials on Wettability and Interfacial Characteristics of Al-19Cu-11Si-2Sn Filler Metal for Low Temperature Al to Cu Dissimilar Brazing

摘要: Dissimilar Al 3003 and Cu tubular components were successfully brazed without interface cracking using ZrO2 nanomaterials reinforced with Al-19Cu-11Si-2Sn filler. The filler was initially cast an induction furnace processed into ring form for brazing. coarse CuAl2 Si phases (43 20 μm) refined to 8 4 μm, respectively, after the addition of 0.1 wt. % shows significant improvement in mechanical properties. nanomaterials’ induced diffusion controlled growth mechanism is found be responsible refinement intermetallic particles. wettability Al-19Cu-11Si-2Sn-0.1ZrO2 increased 78.17% on side 93.19% compared from 74.8% 89.9%, respectively. Increase yield strength, ultimate tensile percentage elongation noted joints. Microstructure joint 40 kW 6 seconds thin interfacial compound along copper inter-diffusion region aluminum their respective discussed. strength joints increasing a base metal fracture. Analysis fractured samples effectiveness crack propagation through