| 高压下FexN化合物的相分解 |
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| 引用本文： | 魏玉年,姚玉书.高压下FexN化合物的相分解[J].高压物理学报,1992,6(1):75-80. |
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| 作者姓名： | 魏玉年 姚玉书 |
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| 作者单位： | 中国科学院物理研究所磁学开放实验室，中国科学院物理研究所磁学开放实验室，中国科学院物理研究所磁学开放实验室，中国科学院物理研究所超导国家重点实验室，中国科学院物理研究所，中国科学院物理研究所 北京 100080，北京 100080，北京 100080，北京 100080，北京 100080，北京 100080 |
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| 摘 要： | 本文研究了室温下压力对FexN化合物相分解的影响。X射线衍射分析表明，高压促使氮原子从FexN化合物的晶格中脱溶出来，引起相分解，形成母相与α-Fe。这种相分解现象随压力增大而加强。通过分析不同压力下母相FexN与α-Fe的相对含量，研究了氮从FexN中脱溶的动力学过程，并计算出激活体积。对于Fe3N和Fe4N化合物，其激活体积分别为2.24×10-5 m3/mol和1.62×10-5 m3/mol。本实验还指出，通过对FexN化合物的高压处理以及适当条件下退火，可以获得Fe16N2化合物。
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| 关 键 词： | 相分解 高压 激活体积 |
| 收稿时间： | 1991-07-09; |
PHASE DECOMPOSITION OF Fe_xN COMPOUNDS UNDER HIGH PRESSURES |
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| Wei yunian,Sun Ke,Feng yuanbing.PHASE DECOMPOSITION OF Fe_xN COMPOUNDS UNDER HIGH PRESSURES[J].Chinese Journal of High Pressure Physics,1992,6(1):75-80. |
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| Authors: | Wei yunian Sun Ke Feng yuanbing |
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| Institution: | 1. Magnetic Laboratory, Institute of Physics, Academia Sinica, Beijing 100080, China;2. National Laboratory of Superconductivity, Institute of Physics, Academia Sinica, Beijing 100080, China;3. Institute of Physics, Academia Sinica, Beijing 100080, China |
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| Abstract: | The effect of pressure on the decomposition of compounds FexN at room temperature has been investigated X-ray diffraction analysis shows that high pressure prompts nitrogen atoms precipitating from the lattice of FexN compounds, causing phase decomposition and forming parent phase and α-Fe. This phenomenon increases with increasing pressure. Dynamic process of nitrogen precipitation and the activation volume in FexN have been investigated by analyzing the relative content of α-Fe in the parent phase FexN. The activation volume of Fe3N and Fe4N are 2.24×10-5 m3/mol and 1.62×10-5 m3/mol, respectively. The Fe16N2 compound can be obtained at appropriate condition by annealing the FexN compounds which have been compacted under high pressure. |
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| Keywords: | phase decomposition high pressure activation volume |
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