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非晶(Fe_(0.99)Cu_(0.01))_(78)Si_9B_(13)合金等温晶化动力学

刘学东 , 王景唐

金属学报

利用DSC,结合XRD,TEM实验,研究了(Fe_(0.99)Cu_(0.01))_(78)Si_9B_(13)非晶合金等温晶化动力学,结果表明:该合金等温晶化按两个阶段进行,分別析出α-Fe(Si)固溶体和Fe_2B化合物利用局域Avrami指数的概念分析了两相的形核长大方式。并作出了出合金晶化的“C”曲线,通过对两相晶化激活能的分析得出:α-Fe(Si)相较Fe_2B相容易晶化析出,同时,Cu元素的添加有助于改善α-Fe(Si)相的形貌。

关键词: 非晶合金 , activation energy of crystallization , local Avrami index , (Fe_(0.99)Cu_(0.01))_(78)Si_9B_(13) alloy

THE CRYSTALLIZATION KINETICS OF AN AMORPHOUS Ti-RICH NiTi FILM

X. Y. Jiang , H.B. Xu and S.K. Gong (Department of Materials Science and Engineering , Beijing University of Aeronautics and Astronautics , Beijing 100083 , China)

金属学报(英文版)

The crystallization kinetics of an amorphous Ti-rich NiTi film (Ni 46.34at.%, Ti 53.66at.%)prepared by DC magnetron sputtering was determined by non-isothermal techniques. The activation energy of crystallization and the mean value of the Avrami parameter are 382kJ/mol and 0.85, respectively. The calculated isothermal kinetic curse of amorphous film at 773K coincides with the result of X-ray diffraction.The formation of a Ti2Ni phase is accompanied with the crystallization of Ti-rich NiTi film.

关键词: amorphous NiTi film , null , null

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