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

doi:10.1063/1.3665197

IMR OpenIR

	Raman spectrometry study of phase stability and phonon anharmonicity of Al3BC3 at elevated temperatures and high pressures
	Xiang, Huimin 1,2; Li, Fangzhi 1; Li, Jingjing 1,2; Wang, Jiemin 1; Wang, Xiaohui 1; Wang, Jingyang 1; Zhou, Yanchun 1,3
通讯作者	Wang, Jingyang(jywang@imr.ac.cn)
	2011-12-01
发表期刊	JOURNAL OF APPLIED PHYSICS
ISSN	0021-8979
卷号	110 期号:11 页码:7
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]
资助者	Natural Sciences Foundation of China
DOI	10.1063/1.3665197
收录类别	SCI
语种	英语
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
WOS类目	Physics, Applied
WOS记录号	WOS:000298254800025
出版者	AMER INST PHYSICS
引用统计	被引频次：12[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/106944
专题	中国科学院金属研究所
通讯作者	Wang, Jingyang
作者单位	1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, 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.