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Effect of High Temperature Heat Treatment on Phase Composition and Microstructure of SiBCN/HfC Ceramic Composites
Wei, YQ; Yang, Y; Liu, M; Li, QL; Huang, ZR
2020-08-21
Source PublicationJOURNAL OF INORGANIC MATERIALS
ISSN1000-324X
Issue8Pages:931
SubtypeArticle
AbstractAmorphous SiBCN powders were prepared by high-energy ball milling-mechanical alloying method. The SiBCN/HfC ceramic composites were consolidated by spark plasma sintering (SPS). The influence of high temperature heat treatment on the microstructural evolution and phase composition was investigated. The results showed that the oxygen was introduced during the mechanical alloying process, leading to the oxidation of BN to form B2O3 HfO2 was formed in the sintering process result from HfC oxydation and reduced to HfB2 by carbothermal reduction reaction after heat-treatment at 1600 degrees C for 1 h. Both HfO2 and HfC were reduced to HfB2 during the heat-treatment at 1650 degrees C and 1800 degrees C by reaction of HfC + C + B2O3 -> HfB2 + CO. Introduction of oxygen causes phase transformation of the SiBCN/HfC ceramic composites after heat treatment at high temperatures, during which ceramic matrix becomes loose and porous due to volatilization of the gaseous byproducts. Therefore, control of oxygen content is the key to the real applications of SiBCN/HfC ceramic composites at high temperatures.
DOI10.15541/jim20190595
WOS KeywordMECHANICAL-PROPERTIES ; OXIDATION RESISTANCE ; ABLATION BEHAVIOR
Language中文
WOS Research AreaMaterials Science
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27820
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Wei, YQ,Yang, Y,Liu, M,et al. Effect of High Temperature Heat Treatment on Phase Composition and Microstructure of SiBCN/HfC Ceramic Composites[J]. JOURNAL OF INORGANIC MATERIALS,2020(8):931.
APA Wei, YQ,Yang, Y,Liu, M,Li, QL,&Huang, ZR.(2020).Effect of High Temperature Heat Treatment on Phase Composition and Microstructure of SiBCN/HfC Ceramic Composites.JOURNAL OF INORGANIC MATERIALS(8),931.
MLA Wei, YQ,et al."Effect of High Temperature Heat Treatment on Phase Composition and Microstructure of SiBCN/HfC Ceramic Composites".JOURNAL OF INORGANIC MATERIALS .8(2020):931.
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