高压下Zr60Ni20Al20金属玻璃形成过程的研究

Formation of Bulk Metallic Glass Zr60Ni20Al20 by High Pressure Quenching

1.
Institute of Physics, Academia Sinica, Beijing 100080, China;
2.
International Center for Materials Physics, Academia Sinica, Shenyang 110015, China

摘要: 本文报道用高压淬火的方法制备出了Zr60Ni20Al20大块金属玻璃。以经典成核理论为依据，估计了压力对晶核成长速度的影响，在高压下过冷熔体的晶体生长速度比常压下的晶体生长速度低几个数量级，这说明高压淬火之所以有利于金属玻璃的形成，主要是因为压力抑制了过冷熔体内的晶体生长过程。
- 高压淬火 /
- 晶体生长速度 /
- 金属玻璃
Abstract: A bulk Zr60Ni20Al20 amorphous alloy was prepared by using high pressure quenching technique. The crystal growth velocity of the undercooled alloy melts at high pressure was estimated much smaller than at normal pressure, confirming that the high pressure quenching facilitates the formation of metallic glass by suppressing the crystal growth.
- high pressure quenching /
- crystal growth velocity /
- metallic glass