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In-Situ High Temperature X-Ray Diffraction Study of Structure and Phase Transformation of Nd-FePt Alloys

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【Author】 Cheng Gang 1,2* , Gu Zhengfei 2, Zhou Huaiying 2, Wang Zhongmin 2, Zou Ruiping 3, Yuan Songliu 1 (1. Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China; 2. Department of Information of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China ; 3. School of Materials Science and Engineering, University of New South Wales, NSW 2052, Australia)

【机构】 Department of Physics Huazhong University of Science and Technology Wuhan 430074 China； Department of Information of Materials Science and Engineering Guilin University of Electronic Technology Guilin 541004 China； School of Materials Science and Engineering University of New South Wales NSW 2052 Australia Department of Physics Huazhong University of Science and Technology Wuhan 430074 China；

【Abstract】 The structure and disorder-order transformation of Nd_xFe60.5-x Pt39.5 （x=0, 0.5, 1.0, 1.5） alloys were investigated in situ by high temperature X-ray diffraction. The results show that the lattice parameter a of disordered γ phase （FCC, A1 structure type） and the lattice parameter ratio c/a of ordered γ₁ phase （FCT, L1₀ structure type） increase linearly with increasing Nd concentration, whereas the c/a ratio decreases with increasing temperature. The transition temperature from ordered FCT to disordered FCC decreases with increasing Nd concentration, but for alloys quenched rapidly from γ phase region into ice-water it increases with increasing Nd.更多还原

【关键词】 Fe-Pt alloys； phase transformation； high temperature X-ray diffraction； rare earths；
【Key words】 Fe-Pt alloys； phase transformation； high temperature X-ray diffraction； rare earths；

【基金】 ProjectsupportedbytheNationalNaturalScienceFoundationofChina(50261002)

【文献出处】 Journal of Rare Earths ,稀土学报(英文版) , 编辑部邮箱 ,2005年06期

【分类号】TM27
【下载频次】53

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