Study on the Phase Selection and Debye Temperature of Hyper-Peritectic Al-Ni Alloy under High Pressure

The phase selection of hyper-peritectic Al-47wt.%Ni alloy solidified under different pressures was investigated. results show that Al3Ni2 and Al3Ni phases coexist at ambient pressure, while another new α-Al exists simultaneously when high pressure. Based on the competitive growth theory dendrite, a kinetic stabilization metastable peritectic with respect to stable ones is predicted for solidification pressures. It demonstrates nucleates grows directly from undercooled liquid. Meanwhile, Debye temperatures fabricated were also calculated using low temperature heat capacity curve.