NiCoNbTi非晶合金晶化行为的研究  

Crystallization Kinetics of NiCoNbTi Amorphous Alloys

作　　者：李青[1] 杨元政[1] 郑许[1] 陶平均[1] 陈木主[1] 

机构地区：[1]广东工业大学材料与能源学院,广东广州510006

出　　处：《热加工工艺》2013年第4期14-17,共4页Hot Working Technology

基　　金：国家自然科学基金项目(50971046);高等学校博士学科点专项科研基金项目(200805620004);广东省教育部产学研结合项目(2011B090400485)

摘　　要：采用单辊甩带法制备出(Ni0.5Co0.5)60Nb25Ti15非晶带材,利用X射线衍射和扫描差热分析对该非晶带材的晶化动力学过程进行研究,并用Kissinger方程计算其晶化激活能。结果表明:(Ni0.5Co0.5)60Nb25Ti15非晶带材在升温过程中晶化过程为一级晶化,且随升温速率的增大,该非晶合金晶化起始温度Tx和晶化峰值温度Tp均增大,其晶化激活能为165.714 kJ/mol,晶化峰值激活能为168.357 kJ/mol。(Ni0.5Co0.5)60Nb25Ti15非晶带材的晶化为多晶析出的共晶晶化方式。（Ni0.sCo0.5）60Nb25Ti15 amorphous ribbons were obtained by a single roller melt-spinning technique. The crystallization kinetics of the alloy was studied by X-ray diffraction （XRD） and differential scanning calorimeter （DSC）, and the activation energies of the alloys were calculated by using Kissinger plot method. The DSC curves indicate that the crystallization process undergoes one stage. With the increase of the heating rate, the crystallization characteristic temperatures increase correspondingly. The activation energy of the onset and peak of crystallization is 165.714kJ/mol and 168.357 kJ/mol, respectively. The crystallization process of the amorphous ribbons is a crystallization method for eutectic multi-crystalline phases.

关 键 词：(Ni0.5Co0.5)60Nb25Ti15非晶带材 升温速率 Kissinger法 晶化行为 

分 类 号：TG230.2[金属学及工艺—铸造] TB357.5[一般工业技术—材料科学与工程]