Meng Fan-Bin(孟凡斌)a)†, Guo Hong-Jun(郭红俊)b), Liu Guo-Dong(刘国栋)a), Liu He-Yan(刘何燕)a), Dai Xue-Fang(代学芳)a), Luo Hong-Zhi(罗鸿志)a), Li Yang-Xian(李养贤)a), Chen Jing-Lan(陈京兰)c), and Wu Guang-Heng(吴光恒)c)
a School of Materials Science & Engineering, Hebei University of Technology, Tianjin 300130, China; b The Institute of Information Engineering, Handan College, Handan 056005, China; c State Key Laboratory for Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Abstract The martensitic transformation in Co37Ni34Al29 ribbon is characterized in detail by means of in-situ thermostatic x-ray diffraction and magnetic measurements. The results show a structural transition from the body-centred cubic to martensite with a tetragonal structure during cooling. Comparison between the results of the diffraction intensity with the magnetic susceptibility measurements indicates that the martensitic transformation takes place in several different steps during cooling from 273 to 163 K. During heating from 313 to 873 K, the peak width becomes very wide and the intensity turns very low. The $\gamma$-phase (face-centred cubic structure) emerges and increases gradually with temperature increasing from 873 to 1073 K.
Received: 13 November 2008
Revised: 22 December 2008
Accepted manuscript online:
Fund: Project
supported by the National Natural Science Foundation of China (Grant
No 50671034), the Natural Science Foundation of Hebei Province,
China (Grant No E2008000072), the Research Project of Hebei
Provincial Office of Education, China (Grant No 2007306), and the
Project of Technological Research and Development of Hebei Province,
China (Grant Nos 07215137 and 07215134).
Cite this article:
Meng Fan-Bin(孟凡斌), Guo Hong-Jun(郭红俊), Liu Guo-Dong(刘国栋), Liu He-Yan(刘何燕), Dai Xue-Fang(代学芳), Luo Hong-Zhi(罗鸿志), Li Yang-Xian(李养贤), Chen Jing-Lan(陈京兰), and Wu Guang-Heng(吴光恒) Successive phase transformation in ferromagnetic shape memory alloys Co37Ni34Al39 melt-spun ribbons 2009 Chin. Phys. B 18 3031
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