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(Ni0.75Fe0.25)70Zr8Si10B12非晶合金非等温晶化行为研究

Non-Isothermal Crystallization Kinetics of (Ni0.75Fe0.25)70Zr8Si10B12 Amorphous Alloy

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【作者】 王翠霞陈学定魏恒斗张静

【Author】 Wang Cuixia~*,Chen Xueding,Wei Hengdou,Zhang Jing (State Key Laboratory of Advanced New Non-Ferrous Materials,Lanzhou University of Technology,Lanzhou 730050,(China))

【机构】 兰州理工大学省部共建有色金属新材料国家重点实验室兰州理工大学省部共建有色金属新材料国家重点实验室 甘肃兰州730050甘肃兰州730050

【摘要】 采用旋铸急冷工艺在真空条件下制备出(Ni0.75Fe0.25)70Zr8Si10B12合金条带。经X射线衍射(XRD)分析表明样品为完全非晶。用DiamondTG/DTA差热分析仪在高纯氩气保护下测量了非晶薄带的热稳定性参数玻璃转变温度Tg、晶化起始温度Txi、晶化峰值温度Tpi。选用不同的升温速率,即10,20,30,40 K.min-1研究其晶化行为。结果表明,随升温速度的增大,特征温度Tg,Txi,Tpi均向高温区移动,其玻璃转变与晶化行为都与加热速率有关,均具有动力学效应。应用Kissinger法与Ozawa法研究了(Ni0.75Fe0.25)70Zr8Si10B12非晶合金的非等温晶化动力学行为。计算了不同特征温度下的激活能E、频率因子,用Kissinger法和Ozawa法计算的激活能结果是一致的。

【Abstract】 Amorphous ribbon specimen of(Ni0.75Fe0.25)70Zr8Si10B12 was prepared by a single roller melt-spinning technique in vacuum.XRD analysis indicates that the specimen is fully amorphous.The thermal stability and crystallization of the amorphous alloy was studied by using the differential thermal analysis(DTA) in an argon atmosphere,and glass transition temperature(Tg),crystallization temperatures(Txi),peak temperatures(Tpi) were determined,heating rates were 10,20,30 and 40 K·min-1,respectively.Results show that glass transition temperature(Tg),crystallization temperatures(Txi),peak temperatures(Tpi) of the amorphous alloy all shift to the high temperature zone with the heating rate increasing,suggest that both glass transition and crystallization depend on the heating rate,and have a significant kinetic effect.Non-isothermal crystallization and kinetics of(Ni0.75Fe0.25)70Zr8Si10B12 amorphous alloys were analyzed by using Kissinger plot method and Ozawa plot method.Crystallization activation energy of Tg,Txi,Tpi and frequency factor were calculated.Consistent crystallization activation energy of(Ni0.75Fe0.25)70Zr8Si10B12 amorphous alloy was determined by Kissinger plot method and Ozawa plot method.

【基金】 国家863项目(2003AA32X150)资助
  • 【文献出处】 稀有金属 ,Chinese Journal of Rare Metals , 编辑部邮箱 ,2006年06期
  • 【分类号】TG139.8
  • 【被引频次】1
  • 【下载频次】136
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