Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-hardness and high-toughness submicron grain high-entropy carbide 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 high-hardness and high-toughness submicron grain high-entropy carbide ceramic as well as a preparation method and application thereof. The method comprises the following steps: mixing high-entropy carbide (Ti0. 2Zr0. 2Nb0. 2Ta0. 2Mo0. 2) C powder and CrN to prepare mixed powder, then putting the mixed powder into a graphite mold, and adopting a spark plasma sintering or hot pressed sintering process to prepare the high-hardness and high-toughness submicron grain high-entropy carbide ceramic. The high-entropy carbide ceramic has higher Vickers hardness and fracture toughness than traditional unitary metal carbide ceramic and high-entropy carbide ceramic, the relative density of the high-entropy carbide ceramic is greater than 99%, the grain size of the ceramic is 0.32-0.65 [mu] m, the Vickers hardness is 24-27.5 GPa, the fracture toughness is 3-5.5 MPa.m < 1/2 >, and the high-entropy carbide 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，公开了一种高硬高韧的亚微米晶粒高熵碳化物陶瓷及其制备方法和应用。该方法是将高熵碳化物(Ti0.2Zr0.2Nb0.2Ta0.2Mo0.2)C粉体和CrN混合，制得混合粉体，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，制得高硬高韧的亚微米晶粒高熵碳化物陶瓷，该高熵碳化物陶瓷具有比传统一元金属碳化物陶瓷和高熵碳化物陶瓷更高的维氏硬度和断裂韧性，其相对密度大于99％，陶瓷的晶粒尺寸为0.32～0.65μm，维氏硬度为24～27.5GPa，断裂韧性为3～5.5MPa·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。
High-hardness and high-toughness submicron grain high-entropy carbide 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 high-hardness and high-toughness submicron grain high-entropy carbide ceramic as well as a preparation method and application thereof. The method comprises the following steps: mixing high-entropy carbide (Ti0. 2Zr0. 2Nb0. 2Ta0. 2Mo0. 2) C powder and CrN to prepare mixed powder, then putting the mixed powder into a graphite mold, and adopting a spark plasma sintering or hot pressed sintering process to prepare the high-hardness and high-toughness submicron grain high-entropy carbide ceramic. The high-entropy carbide ceramic has higher Vickers hardness and fracture toughness than traditional unitary metal carbide ceramic and high-entropy carbide ceramic, the relative density of the high-entropy carbide ceramic is greater than 99%, the grain size of the ceramic is 0.32-0.65 [mu] m, the Vickers hardness is 24-27.5 GPa, the fracture toughness is 3-5.5 MPa.m < 1/2 >, and the high-entropy carbide 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，公开了一种高硬高韧的亚微米晶粒高熵碳化物陶瓷及其制备方法和应用。该方法是将高熵碳化物(Ti0.2Zr0.2Nb0.2Ta0.2Mo0.2)C粉体和CrN混合，制得混合粉体，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，制得高硬高韧的亚微米晶粒高熵碳化物陶瓷，该高熵碳化物陶瓷具有比传统一元金属碳化物陶瓷和高熵碳化物陶瓷更高的维氏硬度和断裂韧性，其相对密度大于99％，陶瓷的晶粒尺寸为0.32～0.65μm，维氏硬度为24～27.5GPa，断裂韧性为3～5.5MPa·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。
High-hardness and high-toughness submicron grain high-entropy carbide ceramic as well as preparation method and application thereof
一种高硬高韧的亚微米晶粒高熵碳化物陶瓷及其制备方法和应用
GUO WEIMING (Autor:in) / LIU YANG (Autor:in) / LIN HUATAI (Autor:in)
03.09.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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