Temperature invariable magnetization in Co-Al-Fe alloys by a martensitic transformation
Temperature invariable magnetization in Co-Al-Fe alloys by a martensitic transformation
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Co-Al-Fe 合金中马氏体转变的温度不变磁化强度
DOI：
10.1063/1.5055350
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发表时间：
2018-10
影响因子：
4
通讯作者：
Ren Xiaobing
中科院分区：
文献类型：
--
作者：
Ye Fan;Ma Tianyu;Ren Shuai;Xiao Andong;Liu Xiaolian;Ji Yuanchao;Ren Xiaobing
最近，据报道，在双相铁磁Fe-Ga合金中，通过具有不同磁化强度的两相之间的扩散转变来实现高度热稳定的磁化强度，这补偿了不可避免的磁化强度降低。与通过扩散相变的补偿机制相比，本文报道了无扩散马氏体相变也可以用作实现几乎温度不变磁化的补偿机制。我们发现具有非热弹性马氏体相变的铁磁Co-Al-Fe合金在高达830 K（约81%TC）时表现出几乎不变的磁化强度。原位加热透射电子显微镜显示，从六方密排（hcp）马氏体相与较低的磁化强度逐渐转变为面心立方（fcc）的母相与较高的磁化强度发生在一个很宽的温度范围内，从而引起这样的温度恒定磁化。电阻率测量表明，在加热-冷却循环过程中，fcc → hcp转变可以重复进行，这可以用来设计具有长循环寿命的恒温磁体。最近，有报道称，在双相铁磁Fe-Ga合金中，通过具有不同磁化强度的两相之间的扩散转变实现了高热稳定磁化强度，这补偿了不可避免的磁化降低。与通过扩散相变的补偿机制相比，本文报道了无扩散马氏体相变也可以用作实现几乎温度不变磁化的补偿机制。我们发现具有非热弹性马氏体相变的铁磁Co-Al-Fe合金在高达830 K（约81%TC）时表现出几乎不变的磁化强度。原位加热透射电子显微镜显示，从六方密排（hcp）马氏体相与较低的磁化强度逐渐转变为面心立方（fcc）的母相与较高的磁化强度发生在一个很宽的温度范围内，从而引起这样的温度恒定磁化。那个...
Recently, it was reported that in a dual-phase ferromagnetic Fe-Ga alloy, highly thermally stable magnetization is achieved by a diffusional transformation between the two phases with different magnetizations, which compensates for the inevitable magnetization reduction. Contrasting with the compensation mechanism through a diffusional transformation, here we report that a diffusionless martensitic transition can also be used as a compensation mechanism for achieving nearly temperature invariable magnetization. We found that ferromagnetic Co-Al-Fe alloys with a non-thermoelastic martensitic transformation exhibit almost unchanged magnetization up to 830 K (about 81% TC). In-situ heating transmission electron microscopy reveals that the gradual transformation from a hexagonal close-packed (hcp) martensite phase with lower magnetization into a face-centered-cubic (fcc) parent phase with higher magnetization occurs over a wide temperature range, giving rise to such temperature invariable magnetization. The electrical resistivity measurement reveals that the fcc → hcp transformation can be repeated during heating-cooling cycles, which can be used to design temperature invariable magnets with a long cycling life.Recently, it was reported that in a dual-phase ferromagnetic Fe-Ga alloy, highly thermally stable magnetization is achieved by a diffusional transformation between the two phases with different magnetizations, which compensates for the inevitable magnetization reduction. Contrasting with the compensation mechanism through a diffusional transformation, here we report that a diffusionless martensitic transition can also be used as a compensation mechanism for achieving nearly temperature invariable magnetization. We found that ferromagnetic Co-Al-Fe alloys with a non-thermoelastic martensitic transformation exhibit almost unchanged magnetization up to 830 K (about 81% TC). In-situ heating transmission electron microscopy reveals that the gradual transformation from a hexagonal close-packed (hcp) martensite phase with lower magnetization into a face-centered-cubic (fcc) parent phase with higher magnetization occurs over a wide temperature range, giving rise to such temperature invariable magnetization. The e...
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影响因子：
1.2
作者：
K. Ando;T. Omori;J. Sato;Y. Sutou;K. Oikawa;R. Kainuma;K. Ishida
通讯作者：
K. Ando;T. Omori;J. Sato;Y. Sutou;K. Oikawa;R. Kainuma;K. Ishida
通过增加磁场强度来定制铁磁复合材料的磁致伸缩符号
影响因子：
4
作者：
Gou Junming;Liu Xiaolian;Wu Kaiyun;Wang Yue;Hu Shanshan;Zhao Hui;Xiao Andong;Ma Tianyu;Yan Mi
通讯作者：
Yan Mi
天然复合材料具有高度热稳定性铁磁性
影响因子：
16.6
作者：
Ma T;Gou J;Hu S;Liu X;Wu C;Ren S;Zhao H;Xiao A;Jiang C;Ren X;Yan M
通讯作者：
Yan M
DOI：
10.1007/s11661-007-9253-z
发表时间：
2007-07
期刊：
Metallurgical and Materials Transactions A
影响因子：
--
作者：
A. Khachaturyan;D. Viehland
通讯作者：
A. Khachaturyan;D. Viehland
影响因子：
2.1
作者：
Fingers, RT;Rubertus, CS
通讯作者：
Rubertus, CS