Enhancement of densification and mechanical property of (Hf0.2Zr0.2Ti0.2Nb0.2Ta0.2)N high-entropy bulk ceramic via silicon carbide addition
In this work, high-entropy composite bulk ceramic of (Hf0.2Zr0.2Ti0.2Nb0.2Ta0.2)N/silicon carbide (HEN–SiC) was fabricated via spark plasma sintering (SPS) at 2100 °C with submicron-sized single-phase (Hf0.2Zr0.2Ti0.2Nb0.2Ta0.2)N (HEN) powder as a raw material and SiC particles as a sintering aid. T...
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Tsinghua University Press
2025-01-01
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| Series: | Journal of Advanced Ceramics |
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| Online Access: | https://www.sciopen.com/article/10.26599/JAC.2024.9221004 |
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| author | Wuyang Song Youjun Lu Lutong Yang Maohui Li Xiao Zhang Bo Ma Chuyun Wang Yanmin Wang Jinfeng Li Xiang Liu |
| author_facet | Wuyang Song Youjun Lu Lutong Yang Maohui Li Xiao Zhang Bo Ma Chuyun Wang Yanmin Wang Jinfeng Li Xiang Liu |
| author_sort | Wuyang Song |
| collection | DOAJ |
| description | In this work, high-entropy composite bulk ceramic of (Hf0.2Zr0.2Ti0.2Nb0.2Ta0.2)N/silicon carbide (HEN–SiC) was fabricated via spark plasma sintering (SPS) at 2100 °C with submicron-sized single-phase (Hf0.2Zr0.2Ti0.2Nb0.2Ta0.2)N (HEN) powder as a raw material and SiC particles as a sintering aid. The crystal structure, phase composition, and grain size/morphology of the composite were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and energy dispersive spectroscopy. The relative density and mechanical properties (i.e., bending strength, Vickers hardness, and fracture toughness) of the composite bulk ceramics were analyzed. The results show that the relative density of the composite bulk ceramics with increasing SiC particle content from 0 to 10.0 wt% increases from 93.08%±0.13% to 99.12%±0.12%. The high-entropy composite bulk ceramic with SiC particle content of 10.0 wt% exhibits the optimum mechanical properties (i.e., Vickers hardness of 23.34±0.67 GPa, fracture toughness of 4.35±0.13 MPa·m1/2, and bending strength of 409±11 MPa) compared with the ceramic without SiC particles (i.e., Vickers hardness of 19.16±0.56 GPa, fracture toughness of 3.78±0.09 MPa·m1/2, and bending strength of 335±11 MPa). These results indicate that SiC particles can be distributed and fill the HEN grain boundaries in the ceramic matrix, promoting composite densification via pinning grain boundaries and inhibiting grain growth. The enhanced fracture toughness can be due mainly to fine-grain toughening in addition to lamellar/chain structure toughening. The use of SiC as a sintering aid can promote the densification and fracture toughness of high-entropy nitride bulk ceramics, providing a promising approach for the preparation of high-density, high-performance high-entropy nitride bulk ceramics. |
| format | Article |
| id | doaj-art-1399a1fd7168482e8582341552c2c01e |
| institution | Kabale University |
| issn | 2226-4108 2227-8508 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Tsinghua University Press |
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| series | Journal of Advanced Ceramics |
| spelling | doaj-art-1399a1fd7168482e8582341552c2c01e2025-01-24T07:52:15ZengTsinghua University PressJournal of Advanced Ceramics2226-41082227-85082025-01-01141922100410.26599/JAC.2024.9221004Enhancement of densification and mechanical property of (Hf0.2Zr0.2Ti0.2Nb0.2Ta0.2)N high-entropy bulk ceramic via silicon carbide additionWuyang Song0Youjun Lu1Lutong Yang2Maohui Li3Xiao Zhang4Bo Ma5Chuyun Wang6Yanmin Wang7Jinfeng Li8Xiang Liu9School of Materials Science and Engineering, North Minzu University, Yinchuan 750021, ChinaSchool of Materials Science and Engineering, North Minzu University, Yinchuan 750021, ChinaSchool of Materials Science and Engineering, North Minzu University, Yinchuan 750021, ChinaSchool of Materials Science and Engineering, North Minzu University, Yinchuan 750021, ChinaSchool of Materials Science and Engineering, North Minzu University, Yinchuan 750021, ChinaSchool of Materials Science and Engineering, North Minzu University, Yinchuan 750021, ChinaSchool of Materials Science and Engineering, North Minzu University, Yinchuan 750021, ChinaSchool of Materials Science and Engineering, North Minzu University, Yinchuan 750021, ChinaSchool of Materials Science and Engineering, North Minzu University, Yinchuan 750021, ChinaSchool of Materials Science and Engineering, North Minzu University, Yinchuan 750021, ChinaIn this work, high-entropy composite bulk ceramic of (Hf0.2Zr0.2Ti0.2Nb0.2Ta0.2)N/silicon carbide (HEN–SiC) was fabricated via spark plasma sintering (SPS) at 2100 °C with submicron-sized single-phase (Hf0.2Zr0.2Ti0.2Nb0.2Ta0.2)N (HEN) powder as a raw material and SiC particles as a sintering aid. The crystal structure, phase composition, and grain size/morphology of the composite were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and energy dispersive spectroscopy. The relative density and mechanical properties (i.e., bending strength, Vickers hardness, and fracture toughness) of the composite bulk ceramics were analyzed. The results show that the relative density of the composite bulk ceramics with increasing SiC particle content from 0 to 10.0 wt% increases from 93.08%±0.13% to 99.12%±0.12%. The high-entropy composite bulk ceramic with SiC particle content of 10.0 wt% exhibits the optimum mechanical properties (i.e., Vickers hardness of 23.34±0.67 GPa, fracture toughness of 4.35±0.13 MPa·m1/2, and bending strength of 409±11 MPa) compared with the ceramic without SiC particles (i.e., Vickers hardness of 19.16±0.56 GPa, fracture toughness of 3.78±0.09 MPa·m1/2, and bending strength of 335±11 MPa). These results indicate that SiC particles can be distributed and fill the HEN grain boundaries in the ceramic matrix, promoting composite densification via pinning grain boundaries and inhibiting grain growth. The enhanced fracture toughness can be due mainly to fine-grain toughening in addition to lamellar/chain structure toughening. The use of SiC as a sintering aid can promote the densification and fracture toughness of high-entropy nitride bulk ceramics, providing a promising approach for the preparation of high-density, high-performance high-entropy nitride bulk ceramics.https://www.sciopen.com/article/10.26599/JAC.2024.9221004high-entropy nitride ceramiccomposite ceramicfine-grain tougheningmechanical properties |
| spellingShingle | Wuyang Song Youjun Lu Lutong Yang Maohui Li Xiao Zhang Bo Ma Chuyun Wang Yanmin Wang Jinfeng Li Xiang Liu Enhancement of densification and mechanical property of (Hf0.2Zr0.2Ti0.2Nb0.2Ta0.2)N high-entropy bulk ceramic via silicon carbide addition Journal of Advanced Ceramics high-entropy nitride ceramic composite ceramic fine-grain toughening mechanical properties |
| title | Enhancement of densification and mechanical property of (Hf0.2Zr0.2Ti0.2Nb0.2Ta0.2)N high-entropy bulk ceramic via silicon carbide addition |
| title_full | Enhancement of densification and mechanical property of (Hf0.2Zr0.2Ti0.2Nb0.2Ta0.2)N high-entropy bulk ceramic via silicon carbide addition |
| title_fullStr | Enhancement of densification and mechanical property of (Hf0.2Zr0.2Ti0.2Nb0.2Ta0.2)N high-entropy bulk ceramic via silicon carbide addition |
| title_full_unstemmed | Enhancement of densification and mechanical property of (Hf0.2Zr0.2Ti0.2Nb0.2Ta0.2)N high-entropy bulk ceramic via silicon carbide addition |
| title_short | Enhancement of densification and mechanical property of (Hf0.2Zr0.2Ti0.2Nb0.2Ta0.2)N high-entropy bulk ceramic via silicon carbide addition |
| title_sort | enhancement of densification and mechanical property of hf0 2zr0 2ti0 2nb0 2ta0 2 n high entropy bulk ceramic via silicon carbide addition |
| topic | high-entropy nitride ceramic composite ceramic fine-grain toughening mechanical properties |
| url | https://www.sciopen.com/article/10.26599/JAC.2024.9221004 |
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