alpha- to gamma-Al2O3 martensitic transformation induced by pulsed laser irradiation

doi:10.1016/j.actamat.2010.03.045

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	alpha- to gamma-Al2O3 martensitic transformation induced by pulsed laser irradiation
	Yan, P. F.1; Du, K.1; Sui, M. L.2
刊名	ACTA MATERIALIA
	2010-06-01
卷号	58 期号:11 页码:3867-3876
关键词	Martensitic phase transformation Ceramics High-resolution electron microscopy Twinning Alumina
ISSN号	1359-6454
DOI	10.1016/j.actamat.2010.03.045
通讯作者	Du, K.(kuidu@imr.ac.cn)
英文摘要	A martensitic transformation from the a to the gamma phase of aluminum oxide was observed by transmission electron microscopy (TEM) upon rapid heating induced by pulsed laser irradiation. Two variants possessing a twin relationship were found in the product. High-resolution TEM reveals that the transformation is achieved via the glide of quarter partial dislocations on every other basal plane of alpha-Al2O3. The high thermal stress caused by pulsed laser irradiation is believed to be the main driving force of the phase transformation. This martensitic transformation is associated with a positive volume change and substantial shear strain. The overall shear strain could be minimized by the self-accommodating variants. These characteristics suggest potential application of the martensitic transformation for transformation toughening in ceramic materials. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
资助项目	Chinese Academy of Science ; Cheung Kong Scholars Programme of China ; Natural Sciences Foundation of China[50601027] ; Major State Basic Research Projects of China[2009CB623700]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000278562800006
资助机构	Chinese Academy of Science ; Cheung Kong Scholars Programme of China ; Natural Sciences Foundation of China ; Major State Basic Research Projects of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/101024]
专题	金属研究所_中国科学院金属研究所
通讯作者	Du, K.
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Beijing Univ Technol, Inst Microstruct & Property Adv Mat, Beijing 100124, Peoples R China
推荐引用方式 GB/T 7714	Yan, P. F.,Du, K.,Sui, M. L.. alpha- to gamma-Al2O3 martensitic transformation induced by pulsed laser irradiation[J]. ACTA MATERIALIA,2010,58(11):3867-3876.
APA	Yan, P. F.,Du, K.,&Sui, M. L..(2010).alpha- to gamma-Al2O3 martensitic transformation induced by pulsed laser irradiation.ACTA MATERIALIA,58(11),3867-3876.
MLA	Yan, P. F.,et al."alpha- to gamma-Al2O3 martensitic transformation induced by pulsed laser irradiation".ACTA MATERIALIA 58.11(2010):3867-3876.