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Fabrication and properties of ZrB2-SiC-BN machinable ceramics
Wu, Haitang1,2; Zhang, Weigang1; Zhang, WG
2010-03-01
Source PublicationJOURNAL OF THE EUROPEAN CERAMIC SOCIETY
ISSN0955-2219
Volume30Issue:4Pages:1035-1042
AbstractZrB2-SiC-BN ceramics were fabricated by hot-pressing under argon at 1800 degrees C and 23MPa pressure. The microstructure, mechanical and oxidation resistance properties of the composite were investigated. The flexural strength and fracture toughness of ZrB2-SiC-BN (40 vol%ZrB2-25 vol%SiC-35 vol%BN) composite were 378 MPa and 4.1 MPa M 112, respectively. The former increased by 34% and the latter decreased by 15% compared to those of the conventional ZrB2-SiC (80vol%ZrB2-20vol%SiC). Noticeably, the hardness decreased tremendously by about 67% and the machinability improved noticeably compared to the relative property of the ZrB2-SiC ceramic. The anisothermal and isothermal oxidation behaviors of ZrB2-SiC-BN composites from 1100 to 1500 degrees C in air atmosphere showed that the weight gain of the 80 vol%ZrB2-20 vol%SiC and 43.1 vol%ZrB2-26.9 vol%SiC-30 vol%BN composites after oxidation at 1500 degrees C for 5 h were 0.0714 and 0.0268 g/cm(2), respectively, which indicates that the addition of the BN enhances oxidation resistance of ZrB2-SiC composite. The improved oxidation resistance is attributed to the formation of ample liquid borosilicate film below 1300 degrees C and a compact film of zirconium silicate above 1300 degrees C. The formed borosilicate and zirconium silicate on the surface of ZrB2-SiC-BN ceramics act as an effective barriers for further diffusion of oxygen into the fresh interface of ZrB2-SiC-BN. (C) 2009 Elsevier Ltd. All rights reserved.
KeywordZirconium Diboride Boron Nitride Oxidation Resistance Mechanical Properties Machinability
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.jeurceramsoc.2009.09.022
Indexed BySCI
Language英语
WOS KeywordHIGH TEMPERATURE CERAMICS ; SILICON-CARBIDE ; BORON-NITRIDE ; MECHANICAL-PROPERTIES ; COMPOSITES ; OXIDATION ; NANOCOMPOSITES
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Ceramics
WOS IDWOS:000274763200027
Citation statistics
Cited Times:50[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/6205
Collection多相复杂系统国家重点实验室
Corresponding AuthorZhang, WG
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Sys, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Wu, Haitang,Zhang, Weigang,Zhang, WG. Fabrication and properties of ZrB2-SiC-BN machinable ceramics[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,2010,30(4):1035-1042.
APA Wu, Haitang,Zhang, Weigang,&Zhang, WG.(2010).Fabrication and properties of ZrB2-SiC-BN machinable ceramics.JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,30(4),1035-1042.
MLA Wu, Haitang,et al."Fabrication and properties of ZrB2-SiC-BN machinable ceramics".JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 30.4(2010):1035-1042.
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