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Silicon carbide-medium entropy boride composite ceramic as well as preparation method and application thereof
The invention belongs to the technical field of ceramic materials, and discloses silicon carbide-medium entropy boride composite ceramic as well as a preparation method and application thereof. The molecular formula of the composite ceramic is SiC-(Hf < 0.33 > Zr < 0.33 > Ta < 0.33 >) B2, SiC, carbon black, thermosetting phenolic resin and medium-entropy boride (Hf < 0.33 > Zr < 0.33 > Ta < 0.33 >) B2 are mixed, a solvent and a ball milling medium are added, mixing, ball milling, drying and sieving are performed, and ceramic powder is obtained; carrying out dry pressing molding on the ceramic blank at 80-100MPa to obtain a ceramic biscuit; and brushing a BN layer on the inner surface of a crucible, putting the ceramic biscuit embedded with the Si powder into the crucible, degumming in a vacuum sintering furnace at 700-800 DEG C, and then heating to 1500-1600 DEG C to sinter. The hardness of the composite ceramic at room temperature is 25-30 GPa, the fracture toughness of the composite ceramic is 3.5-4.8 MPa.m < 1/2 >, and the composite ceramic has good mechanical properties.
本发明属于陶瓷材料技术领域，公开了一种碳化硅‑中熵硼化物复相陶瓷及其制备方法和应用。该复相陶瓷的分子式为SiC‑(Hf0.33Zr0.33Ta0.33)B2，是将SiC、炭黑、热固性酚醛树脂和中熵硼化物(Hf0.33Zr0.33Ta0.33)B2混合，加入溶剂和球磨介质经混料、球磨、干燥、过筛，得到陶瓷粉体；将其经80～100MPa干压成型，得到陶瓷素坯；在坩埚内表面刷BN层，将Si粉包埋的陶瓷素坯放入坩埚，在真空烧结炉中，700～800℃脱胶，再升温至1500～1600℃烧结制得。该复相陶瓷在室温下的硬度为25～30GPa，断裂韧性为3.5～4.8MPa·m1/2，具有较好的力学性能。
Silicon carbide-medium entropy boride composite ceramic as well as preparation method and application thereof
The invention belongs to the technical field of ceramic materials, and discloses silicon carbide-medium entropy boride composite ceramic as well as a preparation method and application thereof. The molecular formula of the composite ceramic is SiC-(Hf < 0.33 > Zr < 0.33 > Ta < 0.33 >) B2, SiC, carbon black, thermosetting phenolic resin and medium-entropy boride (Hf < 0.33 > Zr < 0.33 > Ta < 0.33 >) B2 are mixed, a solvent and a ball milling medium are added, mixing, ball milling, drying and sieving are performed, and ceramic powder is obtained; carrying out dry pressing molding on the ceramic blank at 80-100MPa to obtain a ceramic biscuit; and brushing a BN layer on the inner surface of a crucible, putting the ceramic biscuit embedded with the Si powder into the crucible, degumming in a vacuum sintering furnace at 700-800 DEG C, and then heating to 1500-1600 DEG C to sinter. The hardness of the composite ceramic at room temperature is 25-30 GPa, the fracture toughness of the composite ceramic is 3.5-4.8 MPa.m < 1/2 >, and the composite ceramic has good mechanical properties.
本发明属于陶瓷材料技术领域，公开了一种碳化硅‑中熵硼化物复相陶瓷及其制备方法和应用。该复相陶瓷的分子式为SiC‑(Hf0.33Zr0.33Ta0.33)B2，是将SiC、炭黑、热固性酚醛树脂和中熵硼化物(Hf0.33Zr0.33Ta0.33)B2混合，加入溶剂和球磨介质经混料、球磨、干燥、过筛，得到陶瓷粉体；将其经80～100MPa干压成型，得到陶瓷素坯；在坩埚内表面刷BN层，将Si粉包埋的陶瓷素坯放入坩埚，在真空烧结炉中，700～800℃脱胶，再升温至1500～1600℃烧结制得。该复相陶瓷在室温下的硬度为25～30GPa，断裂韧性为3.5～4.8MPa·m1/2，具有较好的力学性能。
Silicon carbide-medium entropy boride composite ceramic as well as preparation method and application thereof
一种碳化硅-中熵硼化物的复相陶瓷及其制备方法和应用
GUO WEIMING (author) / LIU YI (author) / TIAN YU (author) / LIN HUATAI (author)
2024-04-26
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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