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Microstructures and mechanical properties of high-entropy (Ti0.2Zr0.2Hf0.2Nb0.2Ta0.2)C ceramics with the addition of SiC secondary phase
Lu, K; Liu, JX; Wei, XF; Bao, WC; Wu, Y; Li, F; Xu, FF; Zhang, GJ
2020-05-01
Source PublicationJOURNAL OF THE EUROPEAN CERAMIC SOCIETY
ISSN0955-2219
Issue54Pages:1839
SubtypeArticle
AbstractThe relationships between microstructures and mechanical properties especially strength and toughness of high entropy carbide based ceramics are reported in this article. Dense (Ti0.2Zr0.2Hf0.2Nb0.2Ta0.2)C (HEC) and its composite containing 20 vol.% SiC (HEC-20SiC) were prepared by spark plasma sintering. The addition of SiC phase enhanced the densification process, resulting in the promotion of the formation of the single-phase high-entropy carbide during sintering. The high-entropy carbide phase demonstrated a fast grain coarsening but SiC particles remarkably inhibited this phenomena. Dense HEC and HEC-20SiC ceramics sintered at 1900 degrees C exhibits four-point bending strength of 332 +/- 24 MPa and 554 +/- 73 MPa, and fracture toughness of 4.51 +/- 0.61 MPa.m(1/2) and 5.24 +/- 0.41 MPa.m(1/2), respectively. The main toughening mechanism is considered to be crack deflection by the SiC particles.
DOI10.1016/j.jeurceramsoc.2019.12.056
WOS KeywordCARBIDE ; COMPOSITES ; DIBORIDES ; ZIRCONIUM
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/331005/28104
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Lu, K,Liu, JX,Wei, XF,et al. Microstructures and mechanical properties of high-entropy (Ti0.2Zr0.2Hf0.2Nb0.2Ta0.2)C ceramics with the addition of SiC secondary phase[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,2020(54):1839.
APA Lu, K.,Liu, JX.,Wei, XF.,Bao, WC.,Wu, Y.,...&Zhang, GJ.(2020).Microstructures and mechanical properties of high-entropy (Ti0.2Zr0.2Hf0.2Nb0.2Ta0.2)C ceramics with the addition of SiC secondary phase.JOURNAL OF THE EUROPEAN CERAMIC SOCIETY(54),1839.
MLA Lu, K,et al."Microstructures and mechanical properties of high-entropy (Ti0.2Zr0.2Hf0.2Nb0.2Ta0.2)C ceramics with the addition of SiC secondary phase".JOURNAL OF THE EUROPEAN CERAMIC SOCIETY .54(2020):1839.
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