Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Carbon-carbon thermal field composite material and preparation method and application thereof
The invention belongs to the technical field of crucible materials, and provides a carbon-carbon thermal field composite material and a preparation method and application thereof. The preparation method comprises the following steps: sequentially carrying out first heat treatment and densification treatment on a carbon fiber preform to obtain a densified material; and impregnating the densification material in a resin solution, and sequentially carrying out cross-linking curing and cracking carbonization to obtain the high-density carbon/carbon composite material. Soaking the carbon/carbon composite material in a polysilazane solution, and sequentially carrying out drying and heat treatment to form a silicon nitride coating on the surface of the carbon/carbon composite material; after Al2O3 powder and Si3N4-SiC mixed powder are sequentially sprayed on the surface of the silicon nitride coating, the surface of the carbon/carbon composite material is subjected to in-situ reaction through heat treatment to generate a compact composite coating, and finally the carbon-carbon thermal field composite material is formed. When the carbon-carbon thermal field composite material is used as the crucible, high-temperature silicon liquid can be prevented from being infiltrated to react with the carbon-carbon thermal field composite material, and the effect of protecting the carbon-carbon thermal field composite material is achieved.
本发明属于坩埚材料技术领域，提供了一种碳碳热场复合材料及其制备方法和应用。本发明通过将碳纤维预制体依次进行第一热处理和增密处理，得到增密材料；再将增密材料浸渍于树脂溶液后，依次进行交联固化和裂解炭化，得到了高密度碳/碳复合材料。再将碳/碳复合材料浸渍于聚硅氮烷溶液后，依次进行烘干和热处理，在碳/碳复合材料的表面形成氮化硅涂层；氮化硅涂层的表面在依次喷涂Al2O3粉体、Si3N4‑SiC混合粉体后，经热处理，碳/碳复合材料的表面原位反应生成致密的复合涂层，最终形成碳碳热场复合材料；碳碳热场复合材料作为坩埚时，可防止高温硅液浸渗与碳碳热场复合材料反应，起到保护碳碳热场复合材料的作用。
Carbon-carbon thermal field composite material and preparation method and application thereof
The invention belongs to the technical field of crucible materials, and provides a carbon-carbon thermal field composite material and a preparation method and application thereof. The preparation method comprises the following steps: sequentially carrying out first heat treatment and densification treatment on a carbon fiber preform to obtain a densified material; and impregnating the densification material in a resin solution, and sequentially carrying out cross-linking curing and cracking carbonization to obtain the high-density carbon/carbon composite material. Soaking the carbon/carbon composite material in a polysilazane solution, and sequentially carrying out drying and heat treatment to form a silicon nitride coating on the surface of the carbon/carbon composite material; after Al2O3 powder and Si3N4-SiC mixed powder are sequentially sprayed on the surface of the silicon nitride coating, the surface of the carbon/carbon composite material is subjected to in-situ reaction through heat treatment to generate a compact composite coating, and finally the carbon-carbon thermal field composite material is formed. When the carbon-carbon thermal field composite material is used as the crucible, high-temperature silicon liquid can be prevented from being infiltrated to react with the carbon-carbon thermal field composite material, and the effect of protecting the carbon-carbon thermal field composite material is achieved.
本发明属于坩埚材料技术领域，提供了一种碳碳热场复合材料及其制备方法和应用。本发明通过将碳纤维预制体依次进行第一热处理和增密处理，得到增密材料；再将增密材料浸渍于树脂溶液后，依次进行交联固化和裂解炭化，得到了高密度碳/碳复合材料。再将碳/碳复合材料浸渍于聚硅氮烷溶液后，依次进行烘干和热处理，在碳/碳复合材料的表面形成氮化硅涂层；氮化硅涂层的表面在依次喷涂Al2O3粉体、Si3N4‑SiC混合粉体后，经热处理，碳/碳复合材料的表面原位反应生成致密的复合涂层，最终形成碳碳热场复合材料；碳碳热场复合材料作为坩埚时，可防止高温硅液浸渗与碳碳热场复合材料反应，起到保护碳碳热场复合材料的作用。
Carbon-carbon thermal field composite material and preparation method and application thereof
一种碳碳热场复合材料及其制备方法和应用
JIANG JIE (Autor:in) / JIA LINTAO (Autor:in) / SUN ZHULIN (Autor:in) / ZHAO QIANG (Autor:in)
12.12.2023
Patent
Elektronische Ressource
Chinesisch
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