alpha- to gamma-Al(2)O(3) martensitic transformation induced by pulsed laser irradiation

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	alpha- to gamma-Al(2)O(3) martensitic transformation induced by pulsed laser irradiation
	P. F. Yan; K. Du; M. L. Sui
	2010
发表期刊	Acta Materialia
ISSN	1359-6454
卷号	58 期号:11 页码:3867-3876
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-Al(2)O(3). 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.
部门归属	[yan, p. f.; du, k.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [sui, m. l.] beijing univ technol, inst microstruct & property adv mat, beijing 100124, peoples r china.;du, k (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;kuidu@imr.ac.cn mlsui@bjut.edu.cn
关键词	Martensitic Phase Transformation Ceramics High-resolution Electron Microscopy Twinning Alumina Sapphire Alpha-al2o3 Phase-transformation Basal Slip Epsilon Transformation Single-crystals Gamma-alumina Gan Growth Films Dislocations
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31622
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	P. F. Yan,K. Du,M. L. Sui. alpha- to gamma-Al(2)O(3) martensitic transformation induced by pulsed laser irradiation[J]. Acta Materialia,2010,58(11):3867-3876.
APA	P. F. Yan,K. Du,&M. L. Sui.(2010).alpha- to gamma-Al(2)O(3) martensitic transformation induced by pulsed laser irradiation.Acta Materialia,58(11),3867-3876.
MLA	P. F. Yan,et al."alpha- to gamma-Al(2)O(3) martensitic transformation induced by pulsed laser irradiation".Acta Materialia 58.11(2010):3867-3876.