材料科学与工程学报2017，Vol.35Issue(5)：810-814,5.DOI:10.14136/j.cnki.issn 1673-2812.2017.05.024
Mg-Zn-Ca-Ti非晶合金的非等温晶化动力学
Non-isothermal Crystallization Kinetics of Mg-Zn-Ca-Ti Amorphous Alloy
摘要
Abstract
Mg48Zn40 Ca5 TiT and Mg58 Zn30 Ca5Ti7 amorphous alloys were prepared by mechanical alloying (MA).The non-isothermal crystallization of the amorphous alloys at different heating rates was studied by Xray diffraction and differential scanning calorimeter.Results indicate that with the increase of heating rate,the crystallization peak of the alloy moves towards high temperature.The apparent activation energy (Eα) of Mg48 Zn40Ca5Ti7 and Mg58 Zn30Ca5Ti7 amorphous alloys were respectively calculated using the methods of Kissinger,Ozawa and Augis-Bennett.It was then found that the apparent activation energy (Eα) of Mg48 Zn40 Ca5Ti7 amorphous alloy is in the range of 250kJ·mol-1 ～270kJ·mol-1 and the apparent activation energy(Eα) of Mg58 Zn30Ca5Ti7 amorphous alloy is in the range of 180kJ·mol-1 ～200kJ·mol-1.The Avrami exponent(n) of Mg48 Zn40Ca5Ti7 amorphous alloy is always around 1 at different heating rates,and the Avrami exponent(n) of Mg58 Zn30Ca5Ti7 amorphous alloy changes from 2.7 to 1.9 with increasing heating rate.关键词
非晶合金/非等温/晶化激活能/Avrami指数nKey words
amorphous alloys/non isothermal/crystallization activation energy/Avrami exponent(n)分类
矿业与冶金引用本文复制引用
王伟,陈可,袁晓,余传贵,马广旭..Mg-Zn-Ca-Ti非晶合金的非等温晶化动力学[J].材料科学与工程学报,2017,35(5):810-814,5.基金项目
2016中央高校基本科研业务费资助项目(69F/0601) （69F/0601）
南京农业大学科研启动基金资助项目(6Nu/rcqd10-03) （6Nu/rcqd10-03）
