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摘要:
A new model, Chou model, for predicting the fraction of hydriding reaction in La(Fe, Si)(13) compounds was studied. This model is simple and practical, which offers the fraction of hydrogen absorption as a function of time and temperature explicitly. The basic principle and reaction mechanism of hydrogen absorption of alloy materials are briefly introduced. Besides, the "characteristic absorption time" as a new concept has been introduced, which directly reflects the hydrogen absorption rate of the alloy. The shorter the characteristic absorption time is, the faster the hydrogen absorption rate is. Chou model quantitatively explores the hydrogen-absorbing reaction characteristics of La0.7Pr0.3Fe11.5Si1.5 and La0.7Pr0.3Fe11.5Si1.5C0.2 alloys. At the same time, the change of temperature also affects the hydrogen absorption characteristics of the alloys. The relationship between the fraction of hydrogen absorption and the temperature is obtained by the model equation, indicating that the higher the temperature, the shorter the characteristic absorption time, and the faster the hydrogen absorption rate of the alloys, which is consistent with the experimental results.
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来源 :
RARE METAL MATERIALS AND ENGINEERING
ISSN: 1002-185X
年份: 2020
期: 12
卷: 49
页码: 4166-4171
0 . 7 0 0
JCR@2022
ESI高被引阀值:169
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