MICROSTRUCTURAL CHARACTERISTICS AND MECHANICAL PROPERTIES OF A Nb/Nb5Si3 BASED COMPOSITE WITH AND WITHOUT DIRECTIONAL SOLIDIFICATION

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	MICROSTRUCTURAL CHARACTERISTICS AND MECHANICAL PROPERTIES OF A Nb/Nb5Si3 BASED COMPOSITE WITH AND WITHOUT DIRECTIONAL SOLIDIFICATION
	Sheng, L. Y.1; Tian, Y. X.2; Guo, J. T.3
通讯作者	Sheng, L. Y.(lysheng@yeah.net)
	2018-07-01
发表期刊	ADVANCED COMPOSITES LETTERS
ISSN	0963-6935
卷号	27 期号:4 页码:168-175
摘要	The Nb/Nb5Si3 based composites were fabricated by conventional casting (CC) and directional solidification (DS) methods. Microstructural characteristics, compressive properties and fracture toughness of the CC and DS composites were investigated by SEM, XRD, TEM, bending and compression tests. The results demonstrate that in the CC Nb/Nb5Si3 based composite, the intergrowth of fine (Nb,Ti)ss and alpha-(Nb,Ti)5Si3 phases leads to the formation of eutectic structure and the coarse alpha-(Nb,Ti)5Si3 dendritic phase prefers to grow along eutectic cell boundary. The (Nb,Ti)3 Si, (Ti,Nb)5Si3 and Dy2O3 phases mainly segregate along the eutectic cell boundary and moreover there is an orientation relationship between the (Nb,Ti)3Si and (Nb,Ti)ss phases: [001] (Nb,Ti)3Si//[112](Nb,Ti)ss and (110)(Nb,Ti)3Si//(110)(Nb,Ti)ss. The DS processing promotes the formation of coarse primary alpha-(Nb,Ti)5Si3 phase, (Ti,Nb)5Si3/(Nb,Ti)ss eutectic and alpha-(Nb,Ti)5Si3 /(Nb, Ti)ss eutectic in the DS Nb/Nb5Si3 based composite. Moreover, the (Nb,Ti)ss and alpha-(Nb,Ti)5Si3 phases are aligned paralleling to the DS direction and exhibits strong crystal orientation preference. In addition, an orientation relationship between the (Nb,Ti)ss and alpha-(Nb,Ti)5Si3 phases is observed: [310]alpha-(Nb,Ti)5Si3//[110](Nb,Ti)ss. Compared with the CC Nb/Nb5Si3 based composite. the DS Nb/Nb5Si3 based composite possesses the higher yield strength and fracture toughness, which should be ascribed to the microstructure optimization.
关键词	Nb/Nb5Si3 composite Directional solidification Microstructure Mechanical properties
资助者	Strategic New Industry Development Special Foundation of Shenzhen ; Shenzhen Technology Innovation Plan
收录类别	SCI
语种	英语
资助项目	Strategic New Industry Development Special Foundation of Shenzhen[JCYJ20150529162228734] ; Strategic New Industry Development Special Foundation of Shenzhen[JCYJ20150625155931806] ; Strategic New Industry Development Special Foundation of Shenzhen[JCYJ20160427100211076] ; Strategic New Industry Development Special Foundation of Shenzhen[JCYJ20160427170611414] ; Shenzhen Technology Innovation Plan[CXZZ20140731091722497] ; Shenzhen Technology Innovation Plan[CXZZ20140419114548507]
WOS研究方向	Materials Science
WOS类目	Materials Science, Composites
WOS记录号	WOS:000450067200005
出版者	ADCOTEC LTD
引用统计	被引频次：6[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/321006/130350
专题	中国科学院金属研究所
通讯作者	Sheng, L. Y.
作者单位	1.Peking Univ, Shenzhen Inst, Shenzhen 518057, Peoples R China 2.Baosteel Grp Co LTD, Cent Inst, Shanghai 200122, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Sheng, L. Y.,Tian, Y. X.,Guo, J. T.. MICROSTRUCTURAL CHARACTERISTICS AND MECHANICAL PROPERTIES OF A Nb/Nb5Si3 BASED COMPOSITE WITH AND WITHOUT DIRECTIONAL SOLIDIFICATION[J]. ADVANCED COMPOSITES LETTERS,2018,27(4):168-175.
APA	Sheng, L. Y.,Tian, Y. X.,&Guo, J. T..(2018).MICROSTRUCTURAL CHARACTERISTICS AND MECHANICAL PROPERTIES OF A Nb/Nb5Si3 BASED COMPOSITE WITH AND WITHOUT DIRECTIONAL SOLIDIFICATION.ADVANCED COMPOSITES LETTERS,27(4),168-175.
MLA	Sheng, L. Y.,et al."MICROSTRUCTURAL CHARACTERISTICS AND MECHANICAL PROPERTIES OF A Nb/Nb5Si3 BASED COMPOSITE WITH AND WITHOUT DIRECTIONAL SOLIDIFICATION".ADVANCED COMPOSITES LETTERS 27.4(2018):168-175.