Densification and joining of a (HfTaZrNbTi)C high-entropy ceramic by hot pressing |
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| Authors: | Kongbo Sun Zhenwen Yang Ruijie Mu Shiyu Niu Ying Wang Dongpo Wang |
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| Affiliation: | 1. Tianjin Key Laboratory of Advanced Joining Technology, School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, China;2. Key Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education, Tianjin, 300350, China |
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| Abstract: | A bulk (Hf0.2Ta0.2Zr0.2Nb0.2Ti0.2)C high-entropy ceramic (HEC) with a high density was prepared by hot pressing (HP), and through a robust joining technique, large-sized piece was fabricated. A hot-pressed carbide HEC with a single-phase and homogeneous composition was obtained at the sintering temperatures from 1800 to 1950 °C for 30 min under a pressure of 30 MPa. The influence of sintering temperature on the mechanical properties of the HEC was investigated, and the flexural and compressive strengths were reported. Additionally, the feasibility of active brazing of this HEC was studied and solid joints with high shear strength were obtained by atomic diffusion and chemical reaction at the interface, providing a key approach to fabricate complex components of HECs. |
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| Keywords: | High-entropy carbide ceramic Hot pressing Active brazing Mechanical properties |
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