Raman spectrometry study of phase stability and phonon anharmonicity of Al3BC3 at elevated temperatures and high pressures

doi:10.1063/1.3665197

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	Raman spectrometry study of phase stability and phonon anharmonicity of Al3BC3 at elevated temperatures and high pressures
	Xiang, Huimin 1,2; Li, Fangzhi 2; Li, Jingjing 1,2; Wang, Jiemin 2; Wang, Xiaohui 2; Wang, Jingyang 2; Zhou, Yanchun 2,3
刊名	JOURNAL OF APPLIED PHYSICS
	2011-12-01
卷号	110 期号:11 页码:7
ISSN号	0021-8979
DOI	10.1063/1.3665197
通讯作者	Wang, Jingyang(jywang@imr.ac.cn)
英文摘要	In situ Raman spectra of Al3BC3 have been measured at elevated temperatures of up to 1000 degrees C and high pressures of up to 32 GPa. It is shown that there are no abnormal phonon shifts when the measurement conditions were up to 1000 degrees C or up to 27 GPa, which indicates a good structural stability of Al3BC3 at high temperatures and pressures. The Raman active phonon modes were assigned comprehensively to the corresponding vibration modes by first-principles calculations. Interestingly, an abnormal softening of the E-1g(559 cm(-1)) and E-2g(578 cm(-1)) phonon modes were observed when the pressure was higher than 27 GPa. Correlating the results with previous theoretical predictions of polymorphism in Al3BC3, the mode softening at higher pressures might originate from the structural transformation (from hexagonal to tetragonal symmetry) involving changes of Al and C coordination numbers. In addition, the phonon anharmonicity has been investigated by studying the temperature and pressure dependence of the Raman peak shifts and broadenings. Finally, the present work has highlighted that in situ Raman spectrometry study is a sensitive method for investigating the structural stability and phonon anharmonicity of complex ceramics. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3665197]
资助项目	Natural Sciences Foundation of China[50672102] ; Natural Sciences Foundation of China[50832008] ; Natural Sciences Foundation of China[51032006]
WOS研究方向	Physics
语种	英语
出版者	AMER INST PHYSICS
WOS记录号	WOS:000298254800025
资助机构	Natural Sciences Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/106943]
专题	金属研究所_中国科学院金属研究所
通讯作者	Wang, Jingyang
作者单位	1.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 2.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.Aerosp Res Inst Mat & Proc Technol, Beijing 100076, Peoples R China
推荐引用方式 GB/T 7714	Xiang, Huimin,Li, Fangzhi,Li, Jingjing,et al. Raman spectrometry study of phase stability and phonon anharmonicity of Al3BC3 at elevated temperatures and high pressures[J]. JOURNAL OF APPLIED PHYSICS,2011,110(11):7.
APA	Xiang, Huimin.,Li, Fangzhi.,Li, Jingjing.,Wang, Jiemin.,Wang, Xiaohui.,...&Zhou, Yanchun.(2011).Raman spectrometry study of phase stability and phonon anharmonicity of Al3BC3 at elevated temperatures and high pressures.JOURNAL OF APPLIED PHYSICS,110(11),7.
MLA	Xiang, Huimin,et al."Raman spectrometry study of phase stability and phonon anharmonicity of Al3BC3 at elevated temperatures and high pressures".JOURNAL OF APPLIED PHYSICS 110.11(2011):7.