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Chou模型在La(Fe,Si)13基磁性材料中的研究应用
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北京工业大学应用数理学院

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The research applications of Chou model in La (Fe, Si) 13-base magnetic materials
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College of Applied Sciences,Beijing University of Technology,Beijing,100124

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    摘要:

    本文介绍了合金材料吸氢的基本原理及反应机理,主要利用稀土系储氢材料的吸氢模型方程研究了磁性制冷材料La(Fe,Si)13基合金的吸氢特性。通过Chou模型建立了La0.7Pr0.3Fe11.5Si1.5和La0.7Pr0.3Fe11.5Si1.5C0.2合金的吸氢反应分数与时间、温度的具体关系式,探究了两种合金材料的吸氢反应特性。根据模型方程,引入吸氢过程中的重要参数“特征反应时间”,得到在等温等压条件下的La0.7Pr0.3Fe11.5Si1.5和La0.7Pr0.3Fe11.5Si1.5C0.2合金的吸氢反应分数随时间的变化曲线。由模型方程还得到这两种合金吸氢反应分数与温度的关系曲线,曲线表明两种合金均表现出温度越高,特征反应时间越小,合金的吸氢速率越快,与实验得到的结果一致。

    Abstract:

    In this paper, we study a new model for predicting the reacted fraction of hydriding in La(Fe,Si)13 compounds. This model is simple and practical, which offers the reacted 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, and the smaller the characteristic reaction time, the faster the hydrogen absorption rate. Application of the Chou model, quantitatively exploring 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 will also affect the hydrogen absorption characteristics of the alloys, the relationship between the reacted fraction of hydrogen and the temperature is obtained by the model equation, indicating that the higher the temperature, the smaller the characteristic reaction time, the faster the hydrogen absorption rate of the alloys.

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刘永瑞,赵金良,焦宇佳. Chou模型在La(Fe, Si)13基磁性材料中的研究应用[J].稀有金属材料与工程,2020,49(12):4166~4171.[Liu Yong-rui, Zhao Jin-liang, Jiao Yu-jia. The research applications of Chou model in La (Fe, Si) 13-base magnetic materials[J]. Rare Metal Materials and Engineering,2020,49(12):4166~4171.]
DOI:10.12442/j. issn.1002-185X.20191061

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  • 收稿日期:2019-12-17
  • 最后修改日期:2020-02-20
  • 录用日期:2020-03-05
  • 在线发布日期: 2021-01-13
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