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High temperature ablation behavior of pressureless sintered Ta0.8Hf0.2C-based ultra-high temperature ceramics
Zhang, BH; Yin, J; Zheng, JQ; Liu, XJ; Huang, ZR; Dusza, J; Jiang, DL
2020-04-01
Source PublicationJOURNAL OF THE EUROPEAN CERAMIC SOCIETY
ISSN0955-2219
Issue4Pages:1784
SubtypeArticle
AbstractAblation behavior of Ta0.8Hf0.2C and Ta0.6Hf0.2C-10 vol%SiC ceramics was investigated by plasma flame ablation test in air. Linear ablation rate was used for the characterization of ablation resistance and grazing-incidence Xray diffraction (GIXRD), scanning electron microscopy (SEM) and electron backscattered diffraction (EBSD) were used for characterization. Ta0.6Hf0.2C-10 vol%SiC exhibited significantly higher ablation resistance, with ablation rate of 0.7 mu m/sec in comparison to the monolithic system with 3.5 mu m/sec. An unstable single oxide layer of monolithic Ta0.8Hf0.2C with thickness approximately 20 mu m was observed after ablation. Oxidation reactions happened individually as TaC and HfC while 'self-sacrificial' volatilization was mainly controlled by active oxidation of TaC. Hf6Ta2O17 was generated by the combination of HfO2 and TaO. A more stable double reaction-layer was observed after ablation of Ta0.5Hf0.2C-10 vol%SiC ceramic. Passive oxidation of TaC was dominant. Textured Ta2O5 skeleton, filled with Hf-containing TaO6, stopped consumption of SiC and hampered oxygen further diffusion.
DOI10.1016/j.jeurceramsoc.2019.11.043
WOS KeywordOXIDATION BEHAVIOR ; HFC ; TAC ; DENSIFICATION ; COMPOSITES ; CARBIDE
Language英语
WOS Research AreaMaterials Science
PublisherELSEVIER SCI LTD
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Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/28196
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Zhang, BH,Yin, J,Zheng, JQ,et al. High temperature ablation behavior of pressureless sintered Ta0.8Hf0.2C-based ultra-high temperature ceramics[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,2020(4):1784.
APA Zhang, BH.,Yin, J.,Zheng, JQ.,Liu, XJ.,Huang, ZR.,...&Jiang, DL.(2020).High temperature ablation behavior of pressureless sintered Ta0.8Hf0.2C-based ultra-high temperature ceramics.JOURNAL OF THE EUROPEAN CERAMIC SOCIETY(4),1784.
MLA Zhang, BH,et al."High temperature ablation behavior of pressureless sintered Ta0.8Hf0.2C-based ultra-high temperature ceramics".JOURNAL OF THE EUROPEAN CERAMIC SOCIETY .4(2020):1784.
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