氢对锆基块体非晶合金热膨胀系数和有效原子作用势的影响

EFFECTS OF HYDROGEN ON THERMAL EXPANSION COEFFICIENT AND EFFECTIVE PAIR POTENTIAL OF Zr BASE BULK AMORPHOUS ALLOY

利用电弧熔炼及铜模快速铸造的方法制备Zr41.2Ti13.8Cu12.5Ni10Be22.5块状非晶合金,通过电化学方法向块状非晶中充入氢.结果表明,氢提高玻璃转变温度下的线膨胀系数,降低晶化开始温度处的线膨胀系数,延缓玻璃转变前结构弛豫现象的发生.另外,充氢能够增加块体非晶合金材料的原子平均最近邻距离和有效作用势深度.

Zr41.2Ti13.8Cu12.5Ni10Be22.5 bulk amorphous alloy was prepared by arc-melting and rapid casting into a copper mould. Hydrogen charging was performed electrochemically in glycerine-phosphoric acid electrolyte. It is shown that hydrogen increases the thermal expansion coefficient at glass translation temperature and decreases the thermal expansion coefficient at crystallization temperature. The relaxation process from amorphous to a more regular structure is delayed by hydrogen charging. In addition, the average first-neighbour distance and the depth of effective pair potential can be increased after hydrogen charging.