Characterization of initial activation behavior for hydrogen storage alloys by acoustic emission technique

被引：7

作者：

Inoue, Hiroshi ^{[1
]}

Tsuzuki, Ryosuke ^{[1
]}

Nohara, Shinji ^{[1
]}

Iwakura, Chiaki ^{[1
]}

机构：

[1] Osaka Prefecture Univ, Grad Sch Engn, Dept Appl Chem, Osaka 5998531, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2007年 / 446卷

关键词：

hydrogen storage materials; electrochemical reactions; scanning electron microscopy; acoustic emission;

D O I：

10.1016/j.jallcom.2006.12.079

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have monitored the physical processes linked to electrochemical processes in situ occurring at MmNi(3.6)Mn(0.4)Al(0.3)Co(0.7) and TiCr(0.3)V(1.8)Ni(0.3) electrodes using an acoustic emission (AE) technique. The difference in initial activation behavior between both alloy electrodes was characterized by waveforms, power spectra and time history of the AE signals. In the first charging process, the cracking based on hydrogen absorption occurred intensively on the MmNi(3.6)Mn(0.4)Al(0.3)Co(0.7) electrode in the first half, while the cracking on the TiCr(0.3)V(1.8)Ni(0.3) negative electrode occurred after hydrogen evolution. In the initial activation, the MmNi(3.6)Mn(0.4)Al(0.3)Co(0.7) particles were broken down with many large and small cracks, while the TiCr(0.3)V(1.8)Ni(0.3) particles were not pulverized although a few cracks were observed. (C) 2006 Elsevier B.V. All rights reserved.

引用

页码：681 / 686

页数：6

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