刘文胜,吴亚瑜,马运柱,张佳佳,叶晓珊.W17.9Ni65.6B13.5V3非晶合金的非等温晶化动力学研究[J].稀有金属材料与工程,2017,46(10):3048~3052.[Liu Wensheng,Wu Yayu,Ma Yunzhu,Zhang Jiajia,Ye Xiaoshan.Non-isothermal Crystallization Kinetics of W17.9Ni65.6B13.5V3 Amorphous Alloy[J].Rare Metal Materials and Engineering,2017,46(10):3048~3052.]
W17.9Ni65.6B13.5V3非晶合金的非等温晶化动力学研究
投稿时间:2015-06-24  修订日期:2015-11-23
中文关键词:  W-Ni基非晶  非晶薄带  晶化动力学  激活能
基金项目:国家自然科学基金资助(项目号50774098)
中文摘要:
      采用单辊急冷法制备了W17.9Ni65.6B13.5V3非晶薄带,并用X射线衍射(XRD)和示差扫描量热分析仪(DSC)研究了该非晶合金的变温晶化动力学。结果表明:玻璃转变温度Tg、晶化起始温度Tx和晶化峰值温度Tp均随着升温速率的增加而提高,具有明显的动力学效应;利用Kissinger方程和Ozawa方程求出的W17.9Ni65.6B13.5V3非晶合金的晶化激活能Ex分别达456.9kJ/mol和471.1kJ/mol,非晶合金具有较强的热稳定性;利用Kissinger方程和Ozawa方程计算得到的晶化激活能Ex均小于晶体长大激活能Ep,表明形核过程比晶粒长大过程更容易,该非晶合金在一定条件下退火容易获得超细晶粒组织。
Non-isothermal Crystallization Kinetics of W17.9Ni65.6B13.5V3 Amorphous Alloy
英文关键词:W-Ni-based amorphous alloy, amorphous ribbon, crystallization kinetics, activation energy
英文摘要:
      W17.9Ni65.6B13.5V3(at. %)amorphous alloy was prepared by melt spinning method. X-ray diffraction pattern and differential scanning calorimeter were applied to investigate non-isothermal crystallization kinetics of the amorphous alloy. As the heating rate was increased, the values of the glass transition temperature, the initial crystallization temperature and the peak temperature were gone up, suggesting that the amorphous alloy had obvious crystallization kinetics. The crystallization activation energy of W17.9Ni65.6B13.5V3 amorphous alloy calculated by Kissinger equations and Ozawa equations was 456.9kJ/mol and 471.1kJ/mol, respectively, indicating that the amorphous alloy possessed high thermal stability. The values of crystallization activation energy Ex were smaller than nucleation activation energy Ep calculated by Kissinger equation and Ozawa equation at the characteristics of the temperature, which showed that nucleation process more easily than the grain growth process, indicating that ultrafine grains structure could be easily obtained at certain conditions.
作者单位E-mail
刘文胜 中南大学 粉末冶金国家重点实验室 zhuzipm@csu.edu.cn 
吴亚瑜 中南大学 粉末冶金国家重点实验室  
马运柱 中南大学 粉末冶金国家重点实验室 zhuzipm@csu.edu.cn 
张佳佳 中南大学 粉末冶金国家重点实验室  
叶晓珊 中南大学 粉末冶金国家重点实验室  
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