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Silicon carbide hardened and toughened high-entropy carbide composite ceramic as well as preparation method and application thereof
The invention belongs to the technical field of non-oxide ceramic-based composite materials, and discloses a silicon carbide hardened and toughened high-entropy carbide composite ceramic as well as a preparation method and application thereof. The method comprises the following steps: preparing carbon-silicon coated metal mixed powder from titanium powder, zirconium powder, niobium powder, tantalum powder, molybdenum powder, silicon powder and carbon powder in equal molar ratio through a powder coating machine, then putting the mixed powder into a graphite mold, and preparing the silicon carbide hardened and toughened high-entropy carbide composite ceramic by adopting a spark plasma sintering or hot pressed sintering process. The composite ceramic has higher Vickers hardness and fracture toughness than high-entropy carbide ceramic, the relative density is close to 100%, the Vickers hardness is 25-27 GPa, the fracture toughness is 5-7 MPa.m < 1/2 >, and the composite ceramic can be applied to preparation of cutting difficult-to-machine materials or aerospace wear-resistant parts.
本发明属于非氧化物陶瓷基复合材料技术领域，公开了一种碳化硅增硬增韧高熵碳化物的复相陶瓷及其制备方法和应用。该方法是将等摩尔比的钛粉、锆粉、铌粉、钽粉和钼粉，硅粉，碳粉通过粉体包覆机制得碳‑硅包覆金属混合粉体，然后将混合粉体放入石墨模具，采用放电等离子烧结或热压烧结工艺，制得碳化硅增硬增韧高熵碳化物的复相陶瓷，该复相陶瓷具有比高熵碳化物陶瓷更高的维氏硬度和断裂韧性，且相对密度接近100％，维氏硬度为25～27GPa，断裂韧性为5～7MPa·m1/2，可应用在制备切削难加工材料或航空航天耐磨零部件中。
Silicon carbide hardened and toughened high-entropy carbide composite ceramic as well as preparation method and application thereof
The invention belongs to the technical field of non-oxide ceramic-based composite materials, and discloses a silicon carbide hardened and toughened high-entropy carbide composite ceramic as well as a preparation method and application thereof. The method comprises the following steps: preparing carbon-silicon coated metal mixed powder from titanium powder, zirconium powder, niobium powder, tantalum powder, molybdenum powder, silicon powder and carbon powder in equal molar ratio through a powder coating machine, then putting the mixed powder into a graphite mold, and preparing the silicon carbide hardened and toughened high-entropy carbide composite ceramic by adopting a spark plasma sintering or hot pressed sintering process. The composite ceramic has higher Vickers hardness and fracture toughness than high-entropy carbide ceramic, the relative density is close to 100%, the Vickers hardness is 25-27 GPa, the fracture toughness is 5-7 MPa.m < 1/2 >, and the composite ceramic can be applied to preparation of cutting difficult-to-machine materials or aerospace wear-resistant parts.
本发明属于非氧化物陶瓷基复合材料技术领域，公开了一种碳化硅增硬增韧高熵碳化物的复相陶瓷及其制备方法和应用。该方法是将等摩尔比的钛粉、锆粉、铌粉、钽粉和钼粉，硅粉，碳粉通过粉体包覆机制得碳‑硅包覆金属混合粉体，然后将混合粉体放入石墨模具，采用放电等离子烧结或热压烧结工艺，制得碳化硅增硬增韧高熵碳化物的复相陶瓷，该复相陶瓷具有比高熵碳化物陶瓷更高的维氏硬度和断裂韧性，且相对密度接近100％，维氏硬度为25～27GPa，断裂韧性为5～7MPa·m1/2，可应用在制备切削难加工材料或航空航天耐磨零部件中。
Silicon carbide hardened and toughened high-entropy carbide composite ceramic as well as preparation method and application thereof
一种碳化硅增硬增韧高熵碳化物的复相陶瓷及其制备方法和应用
HUANG KUNHENG (author) / GUO WEIMING (author) / LIU YANG (author) / LUO ZHANPENG (author) / LIN HUATAI (author)
2023-06-23
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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