Experimental Study on Hydriding Kinetics of Mechanically Alloying Mg<sub>2</sub>Ni Alloy

doi:10.7652/xjtuxb201305008

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Experimental Study on Hydriding Kinetics of Mechanically Alloying Mg₂Ni Alloy

更新时间：2025-07-09

- Experimental Study on Hydriding Kinetics of Mechanically Alloying Mg₂Ni Alloy
- Vol. 47, Issue 5, Pages: 44-50(2013)
- 作者机构：
  
  西安交通大学动力工程多相流国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201305008
  CLC： TQ052.5
- Online First：10 May 2013，
  
  Published：2013
- 稿件说明：
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Experimental Study on Hydriding Kinetics of Mechanically Alloying Mg₂Ni Alloy[J]. 2013, 47(5): 44-50. DOI: 10.7652/xjtuxb201305008.
DOI：

Experimental Study on Hydriding Kinetics of Mechanically Alloying Mg₂Ni Alloy[J]. 2013, 47(5): 44-50. DOI: 10.7652/xjtuxb201305008. DOI：

摘要

为了研究压力和温度对Mg

Ni储氢合金动力学性能的影响以及吸氢反应机理

采用机械合金化的方法制备了Mg

Ni储氢合金。利用P-C-T测试仪进行活化并测试其吸氢动力学特性

并在实验的基础上结合3种常用的动力学模型分析了Mg

Ni合金吸氢反应的控速步骤。结果表明:Mg

Ni合金在673 K、7.4 MPa条件下活化3次就能够基本活化完全

吸收1 mol氢气所需活化能为43.47 kJ; 温度对其动力学性能影响不明显

相反压力的影响比较大

吸氢反应速率和吸氢量都随压力的升高而增加; 实验结果与JDM和JMA动力学模型比较吻合; 金属氢化物形核长大与氢原子在产物层中的扩散过程是Mg

Ni合金吸氢反应的混合控速步骤。

Abstract

The kinetics performance of the Mg

Ni alloy prepared by the mechanically alloying method was measured using a P-C-T apparatus to investigate the effects of temperature and hydrogen pressure on the kinetics of the Mg

Ni alloy

and its hydriding mechanism. Three commonly used kinetics models were applied to analyze the rate-controlling steps of the Mg

Ni alloy with the experimental data. The results show that three hydriding/dehydriding cycles are enough for the Mg

Ni alloy to be completely activated at 673 K and 7.4 MPa

and the activated energy needed is 43.47 kJ. The effect of temperature on the kinetics property is not obvious while hydrogen pressure displays significant influences o

n the reaction kinetics. The comparison results show that the experimental data fit the JDM and JMA models well. The metal hydride nucleation and the hydrogen atom diffusion in the metal hydride are the mixed rate-controlling steps for mechanically alloying Mg

Ni alloy.

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references

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⁰

Experimental Study on Hydriding Kinetics of Mechanically Alloying Mg2Ni Alloy

DOI：10.7652/xjtuxb201305008

摘要

Abstract

关键词

Keywords

references

Experimental Study on Hydriding Kinetics of Mechanically Alloying Mg₂Ni Alloy