Effect of solid solution and boron vacancy on the microstructural evolution and high temperature strength of W-doped ZrB2 ceramics

doi:10.1016/j.jallcom.2020.154293

SIC OpenIR

	Effect of solid solution and boron vacancy on the microstructural evolution and high temperature strength of W-doped ZrB2 ceramics
	Ding, HJ; Wang, XG; Xia, JF; Bao, WC; Zhang, GJ; Zhang, C; Jiang, DY
	2020-06-25
Source Publication	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
Subtype	Article
Abstract	W-doped ZrB2 ceramics were hot-pressed at 1800-2100 degrees C by using W additive. The effects of W doping on the densification, microstructure, and high temperature strength of ZrB2 ceramics were investigated. The reaction between ZrB2 and W resulted in the formation of WB, ZrB and boron vacancies in ZrB2-x. The solid solution formed by dissolving WB in ZrB2-x has core-shell structure, inhibited the grain growth and densification of ZrB2 ceramics. (W,Zr)B converted to liquid promoted densification at 2100 degrees C, and dissolved the oxygen from the surface of ZrB2 powders. The ZrB2 ceramics with 3-10 vol% W exhibited fine microstructures and high grain boundary strength. The cleaning boundary produced by WB significantly improved the flexural strength of ZrB2 ceramics at 25-1600 degrees C. (Zr,W)B precipitated from vacancy-rich (Zr,W)B2-x solid solution under tensile stress at 1600 degrees C. (C) 2020 Elsevier B.V. All rights reserved.
DOI	10.1016/j.jallcom.2020.154293
WOS Keyword	MECHANICAL-PROPERTIES ; OXIDATION BEHAVIOR ; CARBIDE CERAMICS ; COMPOSITE ; DENSIFICATION ; RESISTANCE ; STABILITY ; TUNGSTEN ; DESIGN
Language	英语
WOS Research Area	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
Publisher	ELSEVIER SCIENCE SA
Citation statistics
Document Type	期刊论文
Identifier	http://ir.sic.ac.cn/handle/331005/27956
Collection	中国科学院上海硅酸盐研究所
Recommended Citation GB/T 7714	Ding, HJ,Wang, XG,Xia, JF,et al. Effect of solid solution and boron vacancy on the microstructural evolution and high temperature strength of W-doped ZrB2 ceramics[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2020.
APA	Ding, HJ.,Wang, XG.,Xia, JF.,Bao, WC.,Zhang, GJ.,...&Jiang, DY.(2020).Effect of solid solution and boron vacancy on the microstructural evolution and high temperature strength of W-doped ZrB2 ceramics.JOURNAL OF ALLOYS AND COMPOUNDS.
MLA	Ding, HJ,et al."Effect of solid solution and boron vacancy on the microstructural evolution and high temperature strength of W-doped ZrB2 ceramics".JOURNAL OF ALLOYS AND COMPOUNDS (2020).

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