Mechanical properties and damage tolerance of Y2SiO5

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	Mechanical properties and damage tolerance of Y2SiO5
	Z. Q. Sun; J. Y. Wang; M. S. Li; Y. C. Zhou
	2008
发表期刊	Journal of the European Ceramic Society
ISSN	0955-2219
卷号	28 期号:15 页码:2895-2901
摘要	Y2SiO5 has potential applications as functional-structural ceramic and environmental/thermal barrier coating material. As an important grain-boundary phase in the sintered Si3N4, it also influences the mechanical and dielectric performances of the host material. In this paper, we present the mechanical properties of Y2SiO5 including elastic moduli, hardness, strength and fracture toughness, and try to understand the mechanical features from the viewpoint of crystal structure. Y2SiO5 has low shear modulus, low hardness, as well as high capacity for dispersing mechanical damage energy and for resisting crack penetration. Particularly, it can be machined by cemented carbides tools. The crystal structure characteristics of Y2SiO5 suggest the low-energy weakly bonded atomic planes crossed only by the easily breaking Y-O bonds as well as the rotatable rigid SiO4 tetrahedra are the origins of low shear deformation, good damage tolerance and good machinability of this material. TEM observations also demonstrate that the mechanical damage energy was dispersed in the form of the micro-cleavages, stacking faults and twins along these weakly bonded atomic planes. which allows the "microscale-plasticity" for Y2SiO5.
部门归属	[zhou, yanchun] chinese acad sci, inst met res, shenyang natl lab mat sci, high performance ceram div, shenyang 110016, peoples r china. [sun, ziqi] chinese acad sci, grad sch, beijing 100039, peoples r china.;zhou, yc (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, high performance ceram div, 72 wenhua rd, shenyang 110016, peoples r china;yczhou@imr.ac.cn
关键词	Y2sio5 Mechanical Properties Damage Strength Fracture Yttrium Silicate Ceramics System Si3n4-sio2-y2o3 Coatings Monazite Strength Phases
URL	查看原文
WOS记录号	WOS:000259758800011
引用统计	被引频次：68[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/321006/33093
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. Q. Sun,J. Y. Wang,M. S. Li,et al. Mechanical properties and damage tolerance of Y2SiO5[J]. Journal of the European Ceramic Society,2008,28(15):2895-2901.
APA	Z. Q. Sun,J. Y. Wang,M. S. Li,&Y. C. Zhou.(2008).Mechanical properties and damage tolerance of Y2SiO5.Journal of the European Ceramic Society,28(15),2895-2901.
MLA	Z. Q. Sun,et al."Mechanical properties and damage tolerance of Y2SiO5".Journal of the European Ceramic Society 28.15(2008):2895-2901.