Damage Tolerance and Extensive Plastic Deformation of -Yb2Si2O7 from Room to High Temperatures

IMR OpenIR

	Damage Tolerance and Extensive Plastic Deformation of -Yb2Si2O7 from Room to High Temperatures
	Tian, Zhilin; Zheng, Liya; Wang, Jiemin; Yang, Jinbo; Yang, Guang; Wang, Jingyang; jywang@imr.ac.cn
	2015
发表期刊	JOURNAL OF THE AMERICAN CERAMIC SOCIETY
ISSN	0002-7820
卷号	98 期号:9 页码:2843-2851
摘要	beta-Yb2Si2O7 is a promising environmental barrier coating (EBC) material and recently attracted attention for its damage tolerance. To investigate the mechanisms of its damage tolerance and possible plasticity, dense -Yb2Si2O7 sample was synthesized by insitu reaction/hot-pressing method, and its mechanical properties were measured from room to high temperatures. The low magnitudes of hardness to Young's modulus ratio H-V/E, shear modulus to bulk modulus ratio G/B, and high fracture toughness to strength ratio K-IC/sigma provide evidences of damage tolerance of -Yb2Si2O7. -Yb2Si2O7 exhibits extensive plastic deformation in Hertzian contact tests at both room and high temperatures. Transmission electron microscopy (TEM) observations show that the deformation mechanisms are different at low and high temperatures. Deformation twinning and parallel dislocation arrangement occur in plastic deformation at room temperature. Above the brittle-to-ductile transition temperature (between 1200 degrees C and 1300 degrees C), plastic deformation brings out extensive slip and climb of dislocations, while twinning is seldom observed. Measurement of temperature-dependent dynamic Young's modulus demonstrates excellent elastic stiffness retention up to 1300 degrees C.
部门归属	[tian, zhilin ; zheng, liya ; wang, jiemin ; yang, jinbo ; yang, guang ; wang, jingyang] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china ; [tian, zhilin ; zheng, liya ; yang, guang] univ chinese acad sci, beijing 100049, peoples r china ; [yang, guang] northeastern univ, sch met & mat, shenyang 110819, peoples r china
资助者	Natural Sciences Foundation of China [51032006, 51372252]
收录类别	sci
语种	英语
WOS记录号	WOS:000362229400032
引用统计	被引频次：49[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/321006/74704
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, Jiemin,et al. Damage Tolerance and Extensive Plastic Deformation of -Yb2Si2O7 from Room to High Temperatures[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY,2015,98(9):2843-2851.
APA	Tian, Zhilin.,Zheng, Liya.,Wang, Jiemin.,Yang, Jinbo.,Yang, Guang.,...&jywang@imr.ac.cn.(2015).Damage Tolerance and Extensive Plastic Deformation of -Yb2Si2O7 from Room to High Temperatures.JOURNAL OF THE AMERICAN CERAMIC SOCIETY,98(9),2843-2851.
MLA	Tian, Zhilin,et al."Damage Tolerance and Extensive Plastic Deformation of -Yb2Si2O7 from Room to High Temperatures".JOURNAL OF THE AMERICAN CERAMIC SOCIETY 98.9(2015):2843-2851.