Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of graphene composite silicon carbide ceramic material
The invention provides a preparation method of a graphene composite silicon carbide ceramic material, which comprises the following steps: dispersing graphene in an organic dispersing agent to ensurethat a uniform and stable single-layer graphene structure is formed, mixing graphene nanosheets with powder, molding, attaching high-purity silicon micropowder to the surface, in a process of sintering the composite ceramic, and infiltrating the porous SiC/C preform through capillary pressure by liquid silicon. The carbon black reacts with liquid silicon to form secondary beta-SiC, the secondary beta SiC is strongly combined with initial alpha SiC particles to form a three-dimensional framework of the ceramic, the purposes of strengthening and toughening are achieved, and the mechanical property of the silicon carbide material is remarkably improved.
本发明提供一种石墨烯复合碳化硅陶瓷材料的制备方法，通过在有机分散剂中将石墨烯进行分散，确保形成均匀稳定的单层石墨烯结构，将石墨烯纳米片同粉体混合成型，并在表面附着高纯硅微粉，在复合陶瓷的烧结阶段，液态硅通过毛管压力将多孔的SiC/C预成型体浸润。炭黑与液态硅反应形成二次β‑SiC，它与初始的α‑SiC颗粒强力结合，形成陶瓷的三维骨架，达到增强、增韧的目的，显著提升了碳化硅材料的力学性能。
Preparation method of graphene composite silicon carbide ceramic material
The invention provides a preparation method of a graphene composite silicon carbide ceramic material, which comprises the following steps: dispersing graphene in an organic dispersing agent to ensurethat a uniform and stable single-layer graphene structure is formed, mixing graphene nanosheets with powder, molding, attaching high-purity silicon micropowder to the surface, in a process of sintering the composite ceramic, and infiltrating the porous SiC/C preform through capillary pressure by liquid silicon. The carbon black reacts with liquid silicon to form secondary beta-SiC, the secondary beta SiC is strongly combined with initial alpha SiC particles to form a three-dimensional framework of the ceramic, the purposes of strengthening and toughening are achieved, and the mechanical property of the silicon carbide material is remarkably improved.
本发明提供一种石墨烯复合碳化硅陶瓷材料的制备方法，通过在有机分散剂中将石墨烯进行分散，确保形成均匀稳定的单层石墨烯结构，将石墨烯纳米片同粉体混合成型，并在表面附着高纯硅微粉，在复合陶瓷的烧结阶段，液态硅通过毛管压力将多孔的SiC/C预成型体浸润。炭黑与液态硅反应形成二次β‑SiC，它与初始的α‑SiC颗粒强力结合，形成陶瓷的三维骨架，达到增强、增韧的目的，显著提升了碳化硅材料的力学性能。
Preparation method of graphene composite silicon carbide ceramic material
一种石墨烯复合碳化硅陶瓷材料的制备方法
02.04.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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