球磨对Zr-Cu-Al-Ni金属玻璃粉末结构与吸放氢性能的影响

Influence of ball-milling on the structure and hydrogen absorption-desorption behavior of Zr-Cu-Al-Ni metallic glass powders

摘要:

本文研究了球磨对气雾化法所制备的Zr50.7Cu28Al12.3Ni9金属玻璃粉末结构与吸放氢性能的影响。气雾化的金属玻璃粉末在经过80 h的球磨后，仍呈现为非晶态。球磨对金属玻璃粉末吸放氢性能的影响在一台全自动Sieverts装置上进行了测量。球磨之后，金属玻璃粉末的吸氢性能获得提升，粉末的饱和吸氢量从雾化态的0.96 wt.% (H/M≈0.7)提升至了球磨后的2.66 wt.% (H/M≈1.9)。然而，由于吸氢后金属玻璃粉末内部生成稳定的氢化物相，使得球磨后的金属玻璃粉末的放氢性能未能获得提升。

关键词:球磨; 结构; 吸放氢性能; 金属玻璃粉末

Abstract:

In this paper, the influence of ball-milling on the structure and hydrogen absorption-desorption behavior of Zr50.7Cu28Al12.3Ni9 metallic glass powders produced by gas atomization were studied. The as-atomized metallic glass powders were ball-milled for 80 h. It is found that the powders remain amorphous state after the ball-milling process. The effects of ball-milling on the hydrogen absorption-desorption behavior of the metallic glass powders were measured with an automatic Sieverts apparatus. After the ball-milling, the hydrogen absorption behavior of the metallic glass powders is improved. In addition, the hydrogen absorption capacity of the ball-milled metallic glass powders increases to 2.66 wt.% (H/M≈1.9) from 0.96 wt.% (H/M≈0.7) of the as-atomized metallic glass powders. However, the hydrogen desorption behavior of the ball-milled metallic glass powders is still poor due to the formation of very stable hydride.

Key words:ball-milling; structure; hydrogen absorption-desorption behavior; metallic glass powders