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Non-equal-ratio high-entropy carbide ceramic material and preparation method thereof
The material is characterized in that the molecular formula of the material is Mo < 1-x > (Ti1/4Zr1/4Nb1/4Ta1/4) xC (x is not equal to 0.8, 0lt, xlt, 1), Mo is a key element for component and performance adjustment, Ti is a key element for component and performance adjustment, and Ti is a key element for component and performance adjustment. The preparation method comprises the following steps: taking Mo2C powder, TiC powder, ZrC powder, NbC powder, TaC powder and graphite as raw materials, adding stearic acid as a ball milling medium, and grinding in a WC ball milling tank to obtain mixed powder; carrying out hot pressed sintering on the mixed powder after compression molding; and after sintering, cooling to obtain a target product. A series of high-entropy carbide ceramics with different Mo contents are successfully synthesized by adjusting the Mo content and the preparation process. Through detection, the mechanical property, the oxidation resistance and the high-temperature tribological property of the series of high-entropy ceramics are regularly changed along with the increase of the Mo content, and an oxide generated by Mo at a high temperature has a synergistic lubrication effect, so that the friction coefficient is reduced, and the tribological property of the high-entropy carbide is further improved. The high-entropy carbide system is expanded, and the high-entropy carbide has potential application prospects in extremely severe working conditions such as high temperature and high load.
本发明涉及一种非等比高熵碳化物陶瓷材料及其制备方法，该材料特点在于其分子式为Mo1‑x(Ti1/4Zr1/4Nb1/4Ta1/4)xC（x≠0.8，0
Non-equal-ratio high-entropy carbide ceramic material and preparation method thereof
The material is characterized in that the molecular formula of the material is Mo < 1-x > (Ti1/4Zr1/4Nb1/4Ta1/4) xC (x is not equal to 0.8, 0lt, xlt, 1), Mo is a key element for component and performance adjustment, Ti is a key element for component and performance adjustment, and Ti is a key element for component and performance adjustment. The preparation method comprises the following steps: taking Mo2C powder, TiC powder, ZrC powder, NbC powder, TaC powder and graphite as raw materials, adding stearic acid as a ball milling medium, and grinding in a WC ball milling tank to obtain mixed powder; carrying out hot pressed sintering on the mixed powder after compression molding; and after sintering, cooling to obtain a target product. A series of high-entropy carbide ceramics with different Mo contents are successfully synthesized by adjusting the Mo content and the preparation process. Through detection, the mechanical property, the oxidation resistance and the high-temperature tribological property of the series of high-entropy ceramics are regularly changed along with the increase of the Mo content, and an oxide generated by Mo at a high temperature has a synergistic lubrication effect, so that the friction coefficient is reduced, and the tribological property of the high-entropy carbide is further improved. The high-entropy carbide system is expanded, and the high-entropy carbide has potential application prospects in extremely severe working conditions such as high temperature and high load.
本发明涉及一种非等比高熵碳化物陶瓷材料及其制备方法，该材料特点在于其分子式为Mo1‑x(Ti1/4Zr1/4Nb1/4Ta1/4)xC（x≠0.8，0
Non-equal-ratio high-entropy carbide ceramic material and preparation method thereof
一种非等比高熵碳化物陶瓷材料及其制备方法
FAN HENGZHONG (author) / ZHENG XIANDE (author) / CHEN HONGXIANG (author) / ZHANG YONGSHENG (author) / SU YUNFENG (author) / SONG JUNJIE (author) / HU LITIAN (author)
2024-08-13
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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