Bimodal grain structure effect on the static and dynamic mechanical properties of transparent polycrystalline magnesium aluminate (spinel)

doi:10.1016/j.ceramint.2019.07.010

	Bimodal grain structure effect on the static and dynamic mechanical properties of transparent polycrystalline magnesium aluminate (spinel)
	Jiang, Wen; Cheng, Xingwang; Xiong, Zhiping; Ali, Tayyeb; Cai, Hongnian; Zhang, Jian
刊名	CERAMICS INTERNATIONAL
	2019-11-01
卷号	45 期号:16 页码:20362
关键词	Spinel Bimodal grain structure Static mechanical property Dynamic mechanical property
ISSN号	0272-8842
DOI	10.1016/j.ceramint.2019.07.010
文献子类	Article
英文摘要	Transparent polycrystalline magnesium aluminate (spinel) with bimodal and unimodal grain structures were prepared. The influence of grain size distribution on static and dynamic mechanical properties were systematically investigated. The results showed that bimodal grain structure spinel has larger flexural strength (236.31 MPa) compared to unimodal grain structure spinel (221.38 MPa). Whereas, their values of hardness are very similar (15.1 vs 14.7 GPa) and fracture toughness remains unchanged (1.1 MPa.m(1/2) for both spinel). Although static compression strength of bimodal grain structure spinet (1236 MPa) is higher than that of unimodal one (1078 MPa) due to a smaller average grain size in the former, the negative effect of bimodal grain structure reduced the spinel strength compared to theoretically predicted value. Bimodal grain structure spinet shows slightly lower increment (49%) in compression strength from static to dynamic loading compared to that of unimodal one (57%) due to a decreased strain-rate sensitivity ascribed to bimodal grain structure. A brittle mode in inelastic deformation at Hugoniot elastic limit was demonstrated in both bimodal and unimodal grain structures. Bimodal grain structure has an influence on the Hall-Petch-like relation of yield strength under planar impact loading.
WOS研究方向	Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/26743]
专题	中国科学院上海硅酸盐研究所
推荐引用方式 GB/T 7714	Jiang, Wen,Cheng, Xingwang,Xiong, Zhiping,et al. Bimodal grain structure effect on the static and dynamic mechanical properties of transparent polycrystalline magnesium aluminate (spinel)[J]. CERAMICS INTERNATIONAL,2019,45(16):20362.
APA	Jiang, Wen,Cheng, Xingwang,Xiong, Zhiping,Ali, Tayyeb,Cai, Hongnian,&Zhang, Jian.(2019).Bimodal grain structure effect on the static and dynamic mechanical properties of transparent polycrystalline magnesium aluminate (spinel).CERAMICS INTERNATIONAL,45(16),20362.
MLA	Jiang, Wen,et al."Bimodal grain structure effect on the static and dynamic mechanical properties of transparent polycrystalline magnesium aluminate (spinel)".CERAMICS INTERNATIONAL 45.16(2019):20362.