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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 PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
SubtypeArticle
AbstractW-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.
DOI10.1016/j.jallcom.2020.154293
WOS KeywordMECHANICAL-PROPERTIES ; OXIDATION BEHAVIOR ; CARBIDE CERAMICS ; COMPOSITE ; DENSIFICATION ; RESISTANCE ; STABILITY ; TUNGSTEN ; DESIGN
Language英语
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
PublisherELSEVIER SCIENCE SA
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Document Type期刊论文
Identifierhttp://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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