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Metal tantalum fiber toughened high-entropy boride composite ceramic as well as preparation method and application thereof
The invention relates to the field of ultra-high-temperature ceramic materials, in particular to metal tantalum fiber toughened (Ti, Hf, Zr, Nb and Ta) B2/SiC high-entropy boride composite ceramic as well as a preparation method and application of the metal tantalum fiber toughened (Ti, Hf, Zr, Nb and Ta) B2/SiC high-entropy boride composite ceramic. According to the preparation method, (Ti, Hf, Zr, Nb and Ta) B2 powder, metal Ta fibers and SiC serve as raw materials, the composite ceramic is prepared through a spark plasma sintering technology, metal toughening and fiber toughening are combined, toughening is conducted through continuous metal fibers which are resistant to high temperature and oxidation and have the thermal expansion coefficient slightly larger than that of a ceramic matrix, the stress types of the matrix and the fibers can be improved, and the composite ceramic is obtained. The ceramic matrix is subjected to compressive stress, the fibers are subjected to tensile stress, and the fracture toughness of the high-entropy boride ceramic is effectively improved. The toughness of the material is improved, meanwhile, good hardness is kept, and the problem that conventional fiber toughening is prone to oxidation at high temperature is solved.
本发明涉及超高温陶瓷材料领域，具体涉及一种金属钽纤维增韧(Ti,Hf,Zr,Nb,Ta)B2/SiC高熵硼化物复相陶瓷及其制备方法和应用。所述制备方法以(Ti,Hf,Zr,Nb,Ta)B2粉体、金属Ta纤维和SiC为原料，通过放电等离子烧结技术制备得到所述复相陶瓷，将金属增韧与纤维增韧相结合，通过耐高温、抗氧化、热膨胀系数略大于陶瓷基体的连续金属纤维来增韧，则可以改善基体与纤维受力类型，使陶瓷基体受压应力，纤维受张应力，有效改善高熵硼化物陶瓷的断裂韧性。在提高材料韧性的同时也保留了良好的硬度，解决了常规纤维增韧高温易氧化问题。
Metal tantalum fiber toughened high-entropy boride composite ceramic as well as preparation method and application thereof
The invention relates to the field of ultra-high-temperature ceramic materials, in particular to metal tantalum fiber toughened (Ti, Hf, Zr, Nb and Ta) B2/SiC high-entropy boride composite ceramic as well as a preparation method and application of the metal tantalum fiber toughened (Ti, Hf, Zr, Nb and Ta) B2/SiC high-entropy boride composite ceramic. According to the preparation method, (Ti, Hf, Zr, Nb and Ta) B2 powder, metal Ta fibers and SiC serve as raw materials, the composite ceramic is prepared through a spark plasma sintering technology, metal toughening and fiber toughening are combined, toughening is conducted through continuous metal fibers which are resistant to high temperature and oxidation and have the thermal expansion coefficient slightly larger than that of a ceramic matrix, the stress types of the matrix and the fibers can be improved, and the composite ceramic is obtained. The ceramic matrix is subjected to compressive stress, the fibers are subjected to tensile stress, and the fracture toughness of the high-entropy boride ceramic is effectively improved. The toughness of the material is improved, meanwhile, good hardness is kept, and the problem that conventional fiber toughening is prone to oxidation at high temperature is solved.
本发明涉及超高温陶瓷材料领域，具体涉及一种金属钽纤维增韧(Ti,Hf,Zr,Nb,Ta)B2/SiC高熵硼化物复相陶瓷及其制备方法和应用。所述制备方法以(Ti,Hf,Zr,Nb,Ta)B2粉体、金属Ta纤维和SiC为原料，通过放电等离子烧结技术制备得到所述复相陶瓷，将金属增韧与纤维增韧相结合，通过耐高温、抗氧化、热膨胀系数略大于陶瓷基体的连续金属纤维来增韧，则可以改善基体与纤维受力类型，使陶瓷基体受压应力，纤维受张应力，有效改善高熵硼化物陶瓷的断裂韧性。在提高材料韧性的同时也保留了良好的硬度，解决了常规纤维增韧高温易氧化问题。
Metal tantalum fiber toughened high-entropy boride composite ceramic as well as preparation method and application thereof
一种金属钽纤维增韧高熵硼化物复相陶瓷及其制备方法和应用
GUO QILONG (author) / HUA LIANG (author) / YING HAO (author) / YUAN BOWEN (author) / LIU RONGHAO (author)
2024-08-13
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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