Synthesis, mechanical and thermal properties of a damage tolerant ceramic: beta-Lu2Si2O7

IMR OpenIR

	Synthesis, mechanical and thermal properties of a damage tolerant ceramic: beta-Lu2Si2O7
	Tian, Zhilin; Zheng, Liya; Wang, Jingyang; jywang@imr.ac.cn
	2015
发表期刊	JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
ISSN	0955-2219
卷号	35 期号:13 页码:3641-3650
摘要	beta-Lu2Si2O7 is a promising candidate in the third generation of environmental barrier coating (EBC) materials for silicon-based ceramics due to its excellent high temperature environmental durability. However, the high temperature thermal and mechanical properties of beta-Lu2Si2O7 are seldom reported, which hinders the design and evaluation of its EBC applications. In this paper, pure and dense beta-Lu2Si2O7 sample was successfully fabricated and its mechanical properties, including Young's modulus, bulk modulus, shear modulus, Poisson's ratio, flexural strength, fracture toughness and hardness were investigated. The ball indentation test reveals that the main deformation mechanisms of beta-Lu2Si2O7 at room temperature are deformation twinning and dislocation glide, which indicate that beta-Lu2Si2O7 is a damage tolerant ceramic. In addition, the thermal expansion coefficient and thermal shock resistance were measured at high temperatures. beta-Lu2Si2O7 possesses excellent high temperature elastic stiffness up to 1470 degrees C, and the critical temperature difference for thermal shock resistance is 270 K. (C) 2015 Elsevier Ltd. All rights reserved.
部门归属	[tian, zhilin ; zheng, liya ; wang, jingyang] chinese acad sci, inst met res, shenyang natl lab mat sci, high performance ceram div, shenyang 110016, peoples r china ; [tian, zhilin] univ chinese acad sci, beijing 100049, peoples r china
关键词	Rare-earth Silicate Processing Mechanical Property Thermal Property Ebc
资助者	National Natural Science Foundation of China [51032006, 51372252]
收录类别	sci
语种	英语
WOS记录号	WOS:000359029300032
引用统计	被引频次：30[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/321006/75170
专题	中国科学院金属研究所
通讯作者	jywang@imr.ac.cn
推荐引用方式 GB/T 7714	Tian, Zhilin,Zheng, Liya,Wang, Jingyang,et al. Synthesis, mechanical and thermal properties of a damage tolerant ceramic: beta-Lu2Si2O7[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,2015,35(13):3641-3650.
APA	Tian, Zhilin,Zheng, Liya,Wang, Jingyang,&jywang@imr.ac.cn.(2015).Synthesis, mechanical and thermal properties of a damage tolerant ceramic: beta-Lu2Si2O7.JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,35(13),3641-3650.
MLA	Tian, Zhilin,et al."Synthesis, mechanical and thermal properties of a damage tolerant ceramic: beta-Lu2Si2O7".JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 35.13(2015):3641-3650.