Successive phase transformation in ferromagnetic shape memory alloy Co37Ni34Al29 melt-spun ribbons ⁄
Successive phase transformation in ferromagnetic shape memory alloy Co37Ni34Al29 melt-spun ribbons ⁄
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DOI：
10.1088/1674-1056/18/7/069
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发表时间：
2009-07
影响因子：
1.7
通讯作者：
Meng Fanbin;Guo Hong-jun;Liu Guo-dong;Liu Heyan;Dai Xue-fang;Luo Hong-Zhi;Li Yang-xian;Chen Jing-lan;Wu Guang-Heng
中科院分区：
文献类型：
--
作者：
Meng Fanbin;Guo Hong-jun;Liu Guo-dong;Liu Heyan;Dai Xue-fang;Luo Hong-Zhi;Li Yang-xian;Chen Jing-lan;Wu Guang-Heng
用原位恒温X射线衍射和磁性测量方法详细地表征了Co37Ni34Al29薄带的马氏体相变。结果表明，冷却过程中组织由体心立方转变为四方结构的马氏体相。扩散强度与磁化率测量结果的比较表明，在273~163K的冷却过程中，马氏体相变分几个阶段进行，在313~873K的加热过程中，峰宽变得很宽，强度变得很低。从873K到1073K，随着温度的升高，∞相(面心立方结构)逐渐出现并增加。
The martensitic transformation in Co37Ni34Al29 ribbon is characterized in detail by means of in-situ thermostatic x-ray difiraction 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 difiraction intensity with the magnetic susceptibility measurements indicates that the martensitic transformation takes place in several difierent 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 ∞-phase (face-centred cubic structure) emerges and increases gradually with temperature increasing from 873 to 1073 K.