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Medium-entropy boride ceramic as well as preparation method and application thereof
The invention belongs to the technical field of ceramic materials, and discloses medium-entropy boride ceramic as well as a preparation method and application thereof. The molecular formula of the ceramic is (Hf0. 3Zr0. 3Ta0. 3Nb0. 1) B2, and the ceramic is prepared by the following steps: mixing (Hf0. 3Zr0. 3Ta0. 3Nb0. 1) B2 solid solution powder, adding a solvent and a ball milling medium, mixing, drying and sieving to obtain ceramic powder, brushing a layer of BN on the inner surface of a crucible, loading into a graphite mold, heating to 1900-2100 DEG C, and carrying out SPS sintering at the vacuum degree of 10 mbar. The medium-entropy boride ceramic has good mechanical properties, the hardness at room temperature is 26-35 GPa, the fracture toughness is 3.5-4 MPa.m < 1/2 >, the bending strength is 350-500 MPa, and the medium-entropy boride ceramic can be applied to the field of ultra-high temperature (2000 DEG C or above) environments.
本发明属于陶瓷材料技术领域，公开了一种中熵硼化物陶瓷及其制备方法和应用。所述陶瓷的分子式为(Hf0.3Zr0.3Ta0.3Nb0.1)B2，该陶瓷是将(Hf0.3Zr0.3Ta0.3Nb0.1)B2固溶粉末混合，加入溶剂和球磨介质经混料、干燥、过筛，得到陶瓷粉体，在坩埚内表面刷上一层BN，装入石墨模具中，升温至1900～2100℃进行SPS烧结，在真空度10mbar下制得。该中熵硼化物陶瓷具有较好的力学性能，在室温下的硬度为26～35GPa GPa，断裂韧性为3.5～4MPa·m1/2，抗弯强度为350～500MPa，可应用在超高温(2000℃以上)环境领域。
Medium-entropy boride ceramic as well as preparation method and application thereof
The invention belongs to the technical field of ceramic materials, and discloses medium-entropy boride ceramic as well as a preparation method and application thereof. The molecular formula of the ceramic is (Hf0. 3Zr0. 3Ta0. 3Nb0. 1) B2, and the ceramic is prepared by the following steps: mixing (Hf0. 3Zr0. 3Ta0. 3Nb0. 1) B2 solid solution powder, adding a solvent and a ball milling medium, mixing, drying and sieving to obtain ceramic powder, brushing a layer of BN on the inner surface of a crucible, loading into a graphite mold, heating to 1900-2100 DEG C, and carrying out SPS sintering at the vacuum degree of 10 mbar. The medium-entropy boride ceramic has good mechanical properties, the hardness at room temperature is 26-35 GPa, the fracture toughness is 3.5-4 MPa.m < 1/2 >, the bending strength is 350-500 MPa, and the medium-entropy boride ceramic can be applied to the field of ultra-high temperature (2000 DEG C or above) environments.
本发明属于陶瓷材料技术领域，公开了一种中熵硼化物陶瓷及其制备方法和应用。所述陶瓷的分子式为(Hf0.3Zr0.3Ta0.3Nb0.1)B2，该陶瓷是将(Hf0.3Zr0.3Ta0.3Nb0.1)B2固溶粉末混合，加入溶剂和球磨介质经混料、干燥、过筛，得到陶瓷粉体，在坩埚内表面刷上一层BN，装入石墨模具中，升温至1900～2100℃进行SPS烧结，在真空度10mbar下制得。该中熵硼化物陶瓷具有较好的力学性能，在室温下的硬度为26～35GPa GPa，断裂韧性为3.5～4MPa·m1/2，抗弯强度为350～500MPa，可应用在超高温(2000℃以上)环境领域。
Medium-entropy boride ceramic as well as preparation method and application thereof
一种中熵硼化物陶瓷及其制备方法和应用
GUO WEIMING (author) / TIAN YU (author) / LIN HUATAI (author)
2024-04-12
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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