{"title":"SiC-(Ti0.2Zr0.2Hf0.2Nb0.2Ta0.2)B2 composite ceramics prepared by fast hot-press sintering","authors":"Mantang Duan, Iurii Bogomol","doi":"10.1007/s41779-025-01168-1","DOIUrl":null,"url":null,"abstract":"<div><p>Fast hot-press sintering was employed to fabricate SiC-based composite ceramics reinforced by a single high-entropy boride (HEB) phase, specifically Ti₀.₂Zr₀.₂Hf₀.₂Nb₀.₂Ta₀.₂)B₂. The synergistic grain refinement between the SiC and HEB phases resulted in fine microstructures while preserving high hardness in the SiC-HEB composites. As the solid-state sintering temperature increases, the distribution of metal cations in the HEBs becomes more uniform, the relative density rises significantly, and the material’s fracture toughness enhances. The composites achieved a maximum hardness of 23.75 GPa at 1800 °C and peak fracture toughness of 5.1 MPa·m<sup>1/2</sup> at 2000 °C. Compared to previously reported SiC-HEB systems, these ceramics exhibit a superior balance of mechanical properties, making them promising candidates for high-temperature structural applications.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 2","pages":"637 - 647"},"PeriodicalIF":1.8000,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of the Australian Ceramic Society","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s41779-025-01168-1","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
引用次数: 0
Abstract
Fast hot-press sintering was employed to fabricate SiC-based composite ceramics reinforced by a single high-entropy boride (HEB) phase, specifically Ti₀.₂Zr₀.₂Hf₀.₂Nb₀.₂Ta₀.₂)B₂. The synergistic grain refinement between the SiC and HEB phases resulted in fine microstructures while preserving high hardness in the SiC-HEB composites. As the solid-state sintering temperature increases, the distribution of metal cations in the HEBs becomes more uniform, the relative density rises significantly, and the material’s fracture toughness enhances. The composites achieved a maximum hardness of 23.75 GPa at 1800 °C and peak fracture toughness of 5.1 MPa·m1/2 at 2000 °C. Compared to previously reported SiC-HEB systems, these ceramics exhibit a superior balance of mechanical properties, making them promising candidates for high-temperature structural applications.
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Journal of the Australian Ceramic Society since 1965
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