Structural stability of ultra-high temperature refractory material MoSi_2 and Mo_5Si_3 under high pressure
查看参考文献29篇
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文摘
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In-situ angle dispersive x-ray diffraction (ADXRD) with synchrotron radiation source is performed on an ultra-high temperature refractory of MoSi_2 and Mo_5Si_3 by using a diamond anvil cell (DAC) at room temperature. While the pressureinduced volume reduction is almost constant, the value of the bulk modulus increases with the decrease of molybdenum content in the system. According to the Brich-Murnaghan equation, the bulk modulus 222.1 (2.1) GPa with its pressure derivative 4 of MoSi_2, and the bulk modulus 308.4 (7.6) GPa with its pressure derivative 0.7 (0.1) of Mo_5Si_3 are obtained. The experimental data show that MoSi_2 has distinct anisotropic behavior, Mo_5Si_3 is less anisotropic than MoSi_2. The result shows that MoSi_2 and Mo_5Si_3 have the structural stabilities under high pressure. When the pressure reaches up to 41.1 GPa, they can still maintain their body-cantered tetragonal structures. |
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来源
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Chinese Physics. B
,2017,26(5):053101-1-053101-5 【核心库】
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DOI
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10.1088/1674-1056/26/5/053101
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关键词
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high pressure x-ray diffraction
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molybdenum silicide
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synchrotron radiation
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bulk modulus
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地址
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1.
Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, 610065
2.
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049
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语种
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英文 |
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文献类型
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研究性论文 |
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ISSN
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1674-1056 |
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学科
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物理学 |
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基金
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supported by the Joint Fund of the National Natural Science Foundation of China and the Chinese Academy of Sciences
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文献收藏号
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CSCD:6012880
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