Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-entropy tetraboride/hexaboride material and preparation method thereof
The invention relates to a high-entropy tetraboron/hexaboride material and a preparation method thereof, and belongs to the technical field of ultrahigh-temperature ceramic materials. The nominal molecular formula of the material is (Y < 0.2 > La < 0.2 > Ho < 0.2 > Er < 0.2 > Yb < 0.2 >) B4/(Y < 0.2 > La < 0.2 > Ho < 0.2 > Er < 0.2 > Yb < 0.2 >) B6, and the mass ratio of the (Y < 0.2 > La < 0.2 > Ho < 0.2 > Er < 0.2 > Yb < 0.2 >) B4 to the (Y < 0.2 > La < 0.2 > Ho < 0.2 > Er < 0.2 > Yb < 0.2 >) B6 is (38.91-49.50): (61.09-50.05). The preparation method comprises the following steps: uniformly mixing raw material powder by using an acoustic resonance mixer through a wet method, and drying; and when powder needs to be prepared, the aggregate is crushed by using an acoustic resonance mixer. The La-based high-entropy boride powder is synthesized for the first time by adjusting the element proportion, the prepared material is clear in crystal morphology, controllable in proportion and uniform in element distribution, high-entropy solid solution components are reserved, and good thermal stability is achieved; compared with a single-component material, the material is selectively oxidized in the oxidation process due to the high-entropy effect, so that the material has more excellent oxidation resistance. The preparation method can uniformly disperse the raw material powder, and is simple and easy for large-scale production expansion.
本发明涉及一种高熵四硼/六硼化物材料及其制备方法，属于超高温陶瓷材料技术领域。所述材料的名义分子式为(Y0.2La0.2Ho0.2Er0.2Yb0.2)B4/(Y0.2La0.2Ho0.2Er0.2Yb0.2)B6，且(Y0.2La0.2Ho0.2Er0.2Yb0.2)B4与(Y0.2La0.2Ho0.2Er0.2Yb0.2)B6的质量比为38.91～49.50:61.09～50.05。通过将原料粉体使用声学共振混合仪湿法混料，混合均匀，干燥；然后干压成型，再真空恒温焙烧得到，当需要制成粉体时，利用声学共振混合仪将团聚体破碎即可。本发明通过调整元素配比，首次合成La基高熵硼化物粉体，制得的材料晶体形貌清晰、比例可控、元素分布均匀，既保留了高熵固溶体组分，又具备较好的热稳定性；相比于单组元材料，所述材料由于高熵效应，氧化过程中发生选择性氧化，具有更优异的抗氧化性。所述制备方法可将原料粉体均匀分散，简单，易于扩大规模生产。
High-entropy tetraboride/hexaboride material and preparation method thereof
The invention relates to a high-entropy tetraboron/hexaboride material and a preparation method thereof, and belongs to the technical field of ultrahigh-temperature ceramic materials. The nominal molecular formula of the material is (Y < 0.2 > La < 0.2 > Ho < 0.2 > Er < 0.2 > Yb < 0.2 >) B4/(Y < 0.2 > La < 0.2 > Ho < 0.2 > Er < 0.2 > Yb < 0.2 >) B6, and the mass ratio of the (Y < 0.2 > La < 0.2 > Ho < 0.2 > Er < 0.2 > Yb < 0.2 >) B4 to the (Y < 0.2 > La < 0.2 > Ho < 0.2 > Er < 0.2 > Yb < 0.2 >) B6 is (38.91-49.50): (61.09-50.05). The preparation method comprises the following steps: uniformly mixing raw material powder by using an acoustic resonance mixer through a wet method, and drying; and when powder needs to be prepared, the aggregate is crushed by using an acoustic resonance mixer. The La-based high-entropy boride powder is synthesized for the first time by adjusting the element proportion, the prepared material is clear in crystal morphology, controllable in proportion and uniform in element distribution, high-entropy solid solution components are reserved, and good thermal stability is achieved; compared with a single-component material, the material is selectively oxidized in the oxidation process due to the high-entropy effect, so that the material has more excellent oxidation resistance. The preparation method can uniformly disperse the raw material powder, and is simple and easy for large-scale production expansion.
本发明涉及一种高熵四硼/六硼化物材料及其制备方法，属于超高温陶瓷材料技术领域。所述材料的名义分子式为(Y0.2La0.2Ho0.2Er0.2Yb0.2)B4/(Y0.2La0.2Ho0.2Er0.2Yb0.2)B6，且(Y0.2La0.2Ho0.2Er0.2Yb0.2)B4与(Y0.2La0.2Ho0.2Er0.2Yb0.2)B6的质量比为38.91～49.50:61.09～50.05。通过将原料粉体使用声学共振混合仪湿法混料，混合均匀，干燥；然后干压成型，再真空恒温焙烧得到，当需要制成粉体时，利用声学共振混合仪将团聚体破碎即可。本发明通过调整元素配比，首次合成La基高熵硼化物粉体，制得的材料晶体形貌清晰、比例可控、元素分布均匀，既保留了高熵固溶体组分，又具备较好的热稳定性；相比于单组元材料，所述材料由于高熵效应，氧化过程中发生选择性氧化，具有更优异的抗氧化性。所述制备方法可将原料粉体均匀分散，简单，易于扩大规模生产。
High-entropy tetraboride/hexaboride material and preparation method thereof
一种高熵四硼/六硼化物材料及其制备方法
WANG HAILONG (Autor:in) / JI CHENCHEN (Autor:in) / ZHU JINPENG (Autor:in) / LI MINGLIANG (Autor:in) / SHAO GANG (Autor:in) / ZHANG RUI (Autor:in)
12.04.2024
Patent
Elektronische Ressource
Chinesisch
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