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[1]周玉立,朱云峰,李李泉.Mg17Al12合金燃烧合成过程动力学[J].南京工业大学学报(自然科学版),2016,38(02):130-134.[doi:10.3969/j.issn.1671-7627.2016.02.024]
 ZHOU Yuli,ZHU Yunfeng,LI Liquan.Kinetics for the combustion synthesis of Mg17Al12 alloy[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2016,38(02):130-134.[doi:10.3969/j.issn.1671-7627.2016.02.024]
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Mg17Al12合金燃烧合成过程动力学()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
38
期数:
2016年02期
页码:
130-134
栏目:
出版日期:
2016-04-10

文章信息/Info

Title:
Kinetics for the combustion synthesis of Mg17Al12 alloy
文章编号:
1671-7627(2016)02-0130-05
作者:
周玉立朱云峰李李泉
南京工业大学 材料科学与工程学院,江苏 南京 210009
Author(s):
ZHOU YuliZHU YunfengLI Liquan
College of Materials Science and Engineering,Nanjing Tech University,Nanjing 210009,China
关键词:
Mg17Al12合金 燃烧合成 非模型拟合动力学
Keywords:
Mg17Al12 alloy combustion synthesis model-free kinetics
分类号:
TG146.2
DOI:
10.3969/j.issn.1671-7627.2016.02.024
文献标志码:
A
摘要:
采用非模型拟合法研究了Mg17Al12储氢合金燃烧合成过程动力学,为今后规模化制备该合金提供理论指导。首先比较不同样品燃烧合成过程热效应及产物相组分,指出压片预处理方法及小尺寸Al粉均有利于促进合金化反应; 然后分别采用Kissinger法和Flynn-Wall-Ozawa法计算出该反应活化能分别为140.5和142 kJ/mol,对应的最概然机制函数为G(α)=[-ln(1-α)]1/3,符合Avrami-Erofeev方程的随机成核和随后生长机制。最后通过反应前后期产物相组成分析,揭示该燃烧合成过程中Mg-Al合金化反应机制。
Abstract:
The kinetics for the combustion synthesis process of Mg17Al12 hydrogen storage alloy was investigated using model-free methods,it could provide an important theoretical guidance for the industrial production of the alloy.The effects of different pretreatment methods on the thermal behavior and phase compositions of the products were also investigated.Results showed that the pressed samples with smaller Al particle size were more effective to facilitate the alloying kinetics.The formation activation energies of Mg-Al alloy calculated by Kissinger and Flynn-Wall-Ozawa methods were 140.5 kJ/mol and 142 kJ/mol,respectively.The fitted most probable mechanism function for the process G(α)=[-ln(1-α)]1/3,it was in accord with the random nucleation and subsequent growth mechanism of the Avrami-Erofeev equation. And the alloying mechanism of Mg-Al alloy for the combustion synthesis process was revealed by analyzing the phase composition of the products before and after the reaction.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2014-11-27
基金项目:国家自然科学基金(51471087,51171079); 江苏省青蓝工程; 江苏高校优势学科建设工程; 江苏省普通高校研究生科研创新计划(CXZZ13_0420)
作者简介:周玉立(1988—),女,河南商城人,博士,主要研究方向为新型能源材料; 李李泉(联系人),教授,E-mail:lilq@njtech.edu.cn.
引用本文:周玉立,朱云峰,李李泉.Mg17Al12合金燃烧合成过程动力学[J].南京工业大学学报(自然科学版),2016,38(2):130-134..
更新日期/Last Update: 2016-03-20