Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention relates to the technical field of heat-conducting materials, in particular to a heat-conducting SiC ceramic-based composite material and a preparation method thereof. The preparation method of the composite material comprises the following steps: A) alternately stacking two-dimensional fiber cloth made of a specific material and a graphene film subjected to high-temperature graphitization treatment, and sewing with fiber threads to obtain a preform; b) performing high-temperature debonding treatment on the preform; c) performing chemical vapor infiltration treatment on the treated prefabricated body to obtain a prefabricated body with an interface phase; d) impregnating the preform obtained in the step C) with polycarbosilane, and then carrying out crosslinking and high-temperature cracking; e, the step D is repeated until the weight gain rate of the composite material is smaller than 3%, and the heat-conducting SiC ceramic-based composite material is obtained.The prepared heat-conducting SiC ceramic-based composite material has ultrahigh heat-conducting anisotropy, that is, the heat-conducting SiC ceramic-based composite material has ultrahigh heat conductivity in the plane direction but is almost insulated in the thickness direction.
本发明涉及导热材料技术领域，尤其涉及一种导热SiC陶瓷基复合材料及其制备方法。所述复合材料的制备方法包括：A）将特定材质的二维纤维布和高温石墨化处理后的石墨烯薄膜交替堆叠后，采用纤维线缝合，得到预制体；B）将预制体进行高温脱粘处理；C）将处理后的预制体进行化学气相渗透处理，得到带有界面相的预制体；D）采用聚碳硅烷对步骤C）得到的预制体进行浸渍后，再进行交联，高温裂解；E）重复步骤D），直至复合材料的增重率小于3%，得到导热SiC陶瓷基复合材料。本发明制备的导热SiC陶瓷基复合材料拥有超高的导热各向异性，即其平面方向拥有超高热导率，但厚度方向几乎隔热。
The invention relates to the technical field of heat-conducting materials, in particular to a heat-conducting SiC ceramic-based composite material and a preparation method thereof. The preparation method of the composite material comprises the following steps: A) alternately stacking two-dimensional fiber cloth made of a specific material and a graphene film subjected to high-temperature graphitization treatment, and sewing with fiber threads to obtain a preform; b) performing high-temperature debonding treatment on the preform; c) performing chemical vapor infiltration treatment on the treated prefabricated body to obtain a prefabricated body with an interface phase; d) impregnating the preform obtained in the step C) with polycarbosilane, and then carrying out crosslinking and high-temperature cracking; e, the step D is repeated until the weight gain rate of the composite material is smaller than 3%, and the heat-conducting SiC ceramic-based composite material is obtained.The prepared heat-conducting SiC ceramic-based composite material has ultrahigh heat-conducting anisotropy, that is, the heat-conducting SiC ceramic-based composite material has ultrahigh heat conductivity in the plane direction but is almost insulated in the thickness direction.
本发明涉及导热材料技术领域，尤其涉及一种导热SiC陶瓷基复合材料及其制备方法。所述复合材料的制备方法包括：A）将特定材质的二维纤维布和高温石墨化处理后的石墨烯薄膜交替堆叠后，采用纤维线缝合，得到预制体；B）将预制体进行高温脱粘处理；C）将处理后的预制体进行化学气相渗透处理，得到带有界面相的预制体；D）采用聚碳硅烷对步骤C）得到的预制体进行浸渍后，再进行交联，高温裂解；E）重复步骤D），直至复合材料的增重率小于3%，得到导热SiC陶瓷基复合材料。本发明制备的导热SiC陶瓷基复合材料拥有超高的导热各向异性，即其平面方向拥有超高热导率，但厚度方向几乎隔热。
Heat-conducting SiC ceramic-based composite material and preparation method thereof
一种导热SiC陶瓷基复合材料及其制备方法
03.12.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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