Structural Phase Transition of ThC Under High Pressure

被引：16

作者：

Yu, Cun ^{[1
]}

Lin, Jun ^{[1
]}

Huai, Ping ^{[1
]}

Guo, Yongliang ^{[1
,2
]}

Ke, Xuezhi ^{[2
]}

Yu, Xiaohe ^{[1
]}

Yang, Ke ^{[3
]}

Li, Nana

Yang, Wenge ^{[4
,5
]}

Sun, Baoxing ^{[1
]}

Xie, Ruobing ^{[1
]}

Xu, Hongjie ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China

[2] East China Normal Univ, Dept Phys, Shanghai 200241, Peoples R China

[3] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China

[4] Ctrr Pressure Sci & Technol Adv Res HPSTAR, Shanghai 201203, Peoples R China

[5] Carnegie Inst Washington, High Pressure Synerget Consortium HPSynC, Geophys Lab, Argonne, IL 60439 USA

来源：

SCIENTIFIC REPORTS | 2017年 / 7卷

基金：

中国国家自然科学基金;

关键词：

EQUATION-OF-STATE; THORIUM CARBIDE; NITRIDE; CRYSTAL;

D O I：

10.1038/s41598-017-00226-4

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

SThorium monocarbide (ThC) as a potential fuel for next generation nuclear reactor has been subjected to its structural stability investigation under high pressure, and so far no one reported the observation of structure phase transition induced by pressure. Here, utilizing the synchrotron X-ray diffraction technique, we for the first time, experimentally revealed the phase transition of ThC from B1 to P4/nmm at pressure of similar to 58 GPaat ambient temperature. A volume collapse of 10.2% was estimated during the phase transition. A modulus of 147 GPa for ThC at ambient pressure was obtained and the stoichiometry was attributed to the discrepancy of this value to the previous reports.

引用

页数：5

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