Numerical Simulation of Zr_(66)Al_8Cu_7Ni_(19) Preparation Process

摘要

Vacuum suction casting of Zr_(66)Al_8Cu_7Ni_(19) is simulated and the temperature field, temperature gradient, and cooling rate distributions are obtained in this article. The computed results show that the temperature at the bottom of the sample first drops and then rises back to 696 K, which is much higher than the glass transition temperature. It is found that metallic glass can be more easily obtained near the boundary than the central part of the sample. The results illustrate that, in order to obtain metallic glass, the casting temperature of Zr_(66)Al_8Cu_7Ni_(19) should be lower than 1360 K, the diameter should be smaller than 45mm, and the filling velocity should be higher than 4.48ms~(-1).