Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of superhigh-temperature ceramic composite powder with core-shell structure
The invention discloses a preparation method of superhigh-temperature ceramic composite powder with a core-shell structure, and belongs to the technical field of ceramic composite powder preparation. Surfaces of micron-sized superhigh-temperature ceramic particles are modified to form seed centers grafted with silicon oxide gel, and meanwhile, a carbon source and the silicon oxide gel are introduced to form full coating of the superhigh-temperature ceramic particles. And preparing structures such as nano-scale silicon carbide coated ultrahigh-temperature ceramic boride through high-temperature cracking. According to the preparation method of the superhigh-temperature ceramic composite powder with the core-shell structure, the prepared composite powder forms a compact glass layer at an interface at high temperature, so that the composite powder has excellent sintering performance and oxidation resistance, the long-acting oxidation resistance and ablation resistance of a material can be remarkably improved, and the service life of the material is prolonged. Therefore, the material can be used as an anti-oxidation and anti-ablation structure function integrated material for aerospace equipment and the like.
本发明公开了一种核壳结构超高温陶瓷复合粉体的制备方法，属于陶瓷复合粉体制备技术领域，通过对微米级超高温陶瓷颗粒表面改性，以形成氧化硅凝胶接枝的种子中心，同时引入碳源和氧化硅凝胶对超高温陶瓷颗粒形成全包覆。通过高温裂解制备纳米级碳化硅包覆超高温陶瓷硼化物等结构。本发明采用上述的一种核壳结构超高温陶瓷复合粉体的制备方法，制备出的复合粉体在高温下于界面处形成致密玻璃层，从而具有优异的烧结性能和抗氧化性能，可显著提升材料的长效抗氧化、抗烧蚀性能，从而可作为航空航天装备用抗氧化、抗烧蚀结构功能一体化材料等使用。
Preparation method of superhigh-temperature ceramic composite powder with core-shell structure
The invention discloses a preparation method of superhigh-temperature ceramic composite powder with a core-shell structure, and belongs to the technical field of ceramic composite powder preparation. Surfaces of micron-sized superhigh-temperature ceramic particles are modified to form seed centers grafted with silicon oxide gel, and meanwhile, a carbon source and the silicon oxide gel are introduced to form full coating of the superhigh-temperature ceramic particles. And preparing structures such as nano-scale silicon carbide coated ultrahigh-temperature ceramic boride through high-temperature cracking. According to the preparation method of the superhigh-temperature ceramic composite powder with the core-shell structure, the prepared composite powder forms a compact glass layer at an interface at high temperature, so that the composite powder has excellent sintering performance and oxidation resistance, the long-acting oxidation resistance and ablation resistance of a material can be remarkably improved, and the service life of the material is prolonged. Therefore, the material can be used as an anti-oxidation and anti-ablation structure function integrated material for aerospace equipment and the like.
本发明公开了一种核壳结构超高温陶瓷复合粉体的制备方法，属于陶瓷复合粉体制备技术领域，通过对微米级超高温陶瓷颗粒表面改性，以形成氧化硅凝胶接枝的种子中心，同时引入碳源和氧化硅凝胶对超高温陶瓷颗粒形成全包覆。通过高温裂解制备纳米级碳化硅包覆超高温陶瓷硼化物等结构。本发明采用上述的一种核壳结构超高温陶瓷复合粉体的制备方法，制备出的复合粉体在高温下于界面处形成致密玻璃层，从而具有优异的烧结性能和抗氧化性能，可显著提升材料的长效抗氧化、抗烧蚀性能，从而可作为航空航天装备用抗氧化、抗烧蚀结构功能一体化材料等使用。
Preparation method of superhigh-temperature ceramic composite powder with core-shell structure
一种核壳结构超高温陶瓷复合粉体的制备方法
ZHANG ZHONGWEI (Autor:in) / LI WEIJIE (Autor:in) / LIU KAIQIANG (Autor:in) / HAN WEIJIAN (Autor:in) / HONG YIQIANG (Autor:in) / YE LI (Autor:in)
16.07.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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