熔体快淬对AB2型Laves相储氢电极合金循环寿命的影响

The Effect of Rapid Quenching on the Cycle Lives of H2-Storage Electrode Alloys with AB2 Laves Phase

摘要:

研究了快淬处理对AB2型Laves相电极合金循环稳定性的影响，用XRD和SEM分析了铸态及快淬态合金的相结构，并观察了合金的微观组织形貌。结果表明，快淬对AB2型贮氢合金循环稳定性的影响与合金的成分密切相关。快淬对Ti基电极合金的循环寿命有所提高，但不显著；对Ti—Zr基合金，随淬速增加，合金的循环稳定性急剧增加。快淬使AB2型电极合金循环寿命发生变化的根本原因是合金中形成了不同量的非晶相。

Abstract:

The effects of rapid quenching on the cycle stability of the H2-storage electrode alloy with AB2 Laves phase were investigated comprehensively. The phase structures and morphologies of as-cast and quenched alloys were determined and observed by XRD and SEM. The results showed that the influences of rapid quenching on the cycle stability of the H2-storage electrode alloy with AB2 Laves phase was closely related to the compositions of the alloys. The cycle life of Ti-based electrode alloy could be enhanced in certain degree by rapid quenching. For Ti-Zr-based electrode alloy, its cycle life could be exalted dramatically with the increase of quenching rate. The main reason of different influence of rapidly quenching on the cycle stability of the electrode alloy was attributed to that the quantities of the amorphous formed by rapid quenching in alloys were different.