The effect of high pressure on the microstructure hypo-peritectic Al–38wt.%Ni alloy was studied. results show that Al3Ni and Al3Ni2 phases coexist at ambient pressure. However, it becomes a typical hyper-eutectic when synthesized 2 GPa 4 GPa. Meanwhile, interface temperature calculated with combination BCT dendrite growth model, which is suitable for phase. According to highest principle, resul...