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High-thermal-conductivity graphite material of SiC nanowire modified SiC-ZrC coating and preparation method of high-thermal-conductivity graphite material
The invention relates to the field of preparation of high-thermal-conductivity graphite materials, and discloses a high-thermal-conductivity graphite material of a SiC nanowire modified SiC-ZrC coating aiming at the situation that the thermal expansion coefficient difference between a SiC-ZrC ceramic coating and a graphite substrate and between a Zr-Si-O oxide protection layer formed after oxidation and the graphite substrate can affect combination between the coating and graphite and reduce the thermal protection effect of the coating. Comprising a substrate, a transition inner layer and an outer coating, the substrate is made of high-thermal-conductivity graphite, the transition inner layer is a network layer composed of SiC nanowires, the outer coating is a SiC-ZrC coating, the SiC nanowires directly grow on the surface of the high-thermal-conductivity graphite substrate, the SiC nanowires are wrapped by the SiC-ZrC outer coating, pores of the network layer are filled with the SiC-ZrC outer coating, and the compact high-thermal-conductivity graphite material with the SiC-ZrC coating modified by the SiC nanowires is obtained. The high-thermal-conductivity graphite with the SiC nanowire modified SiC-ZrC coating, provided by the invention, has the ablation resistance far better than that of single high-thermal-conductivity graphite and high-thermal-conductivity graphite without the SiC nanowire modified SiC-ZrC coating.
本申请涉及高导热石墨材料制备领域，针对SiC‑ZrC陶瓷涂层以及氧化后形成的Zr‑Si‑O氧化物防护层与石墨基底间的热膨胀系数差异会影响涂层与石墨间的结合，降低涂层的热防护效果，本申请公开了一种SiC纳米线改性SiC‑ZrC涂层的高导热石墨材料，包括基底、过渡内层和外涂层；基底为高导热石墨，过渡内层为SiC纳米线组成的网络层，外涂层为SiC‑ZrC涂层，且SiC纳米线直接生长在高导热石墨基底表面，SiC‑ZrC外涂层包裹SiC纳米线、且填满网络层的孔隙，获得致密的SiC纳米线改性SiC‑ZrC涂层的高导热石墨材料，本发明提出的SiC纳米线改性SiC‑ZrC涂层的高导热石墨，具有远优于单一高导热石墨和无SiC纳米线改性SiC‑ZrC涂层高导热石墨的耐烧蚀性能。
High-thermal-conductivity graphite material of SiC nanowire modified SiC-ZrC coating and preparation method of high-thermal-conductivity graphite material
The invention relates to the field of preparation of high-thermal-conductivity graphite materials, and discloses a high-thermal-conductivity graphite material of a SiC nanowire modified SiC-ZrC coating aiming at the situation that the thermal expansion coefficient difference between a SiC-ZrC ceramic coating and a graphite substrate and between a Zr-Si-O oxide protection layer formed after oxidation and the graphite substrate can affect combination between the coating and graphite and reduce the thermal protection effect of the coating. Comprising a substrate, a transition inner layer and an outer coating, the substrate is made of high-thermal-conductivity graphite, the transition inner layer is a network layer composed of SiC nanowires, the outer coating is a SiC-ZrC coating, the SiC nanowires directly grow on the surface of the high-thermal-conductivity graphite substrate, the SiC nanowires are wrapped by the SiC-ZrC outer coating, pores of the network layer are filled with the SiC-ZrC outer coating, and the compact high-thermal-conductivity graphite material with the SiC-ZrC coating modified by the SiC nanowires is obtained. The high-thermal-conductivity graphite with the SiC nanowire modified SiC-ZrC coating, provided by the invention, has the ablation resistance far better than that of single high-thermal-conductivity graphite and high-thermal-conductivity graphite without the SiC nanowire modified SiC-ZrC coating.
本申请涉及高导热石墨材料制备领域，针对SiC‑ZrC陶瓷涂层以及氧化后形成的Zr‑Si‑O氧化物防护层与石墨基底间的热膨胀系数差异会影响涂层与石墨间的结合，降低涂层的热防护效果，本申请公开了一种SiC纳米线改性SiC‑ZrC涂层的高导热石墨材料，包括基底、过渡内层和外涂层；基底为高导热石墨，过渡内层为SiC纳米线组成的网络层，外涂层为SiC‑ZrC涂层，且SiC纳米线直接生长在高导热石墨基底表面，SiC‑ZrC外涂层包裹SiC纳米线、且填满网络层的孔隙，获得致密的SiC纳米线改性SiC‑ZrC涂层的高导热石墨材料，本发明提出的SiC纳米线改性SiC‑ZrC涂层的高导热石墨，具有远优于单一高导热石墨和无SiC纳米线改性SiC‑ZrC涂层高导热石墨的耐烧蚀性能。
High-thermal-conductivity graphite material of SiC nanowire modified SiC-ZrC coating and preparation method of high-thermal-conductivity graphite material
一种SiC纳米线改性SiC-ZrC涂层的高导热石墨材料及制备方法
YANG CHENG (author) / ZENG CHEN (author) / XU PING (author) / ZHONG JING (author) / SONG WEIJIE (author) / WANG XINHUA (author) / HUANG BIN (author) / LIU JINPING (author)
2023-06-27
Patent
Electronic Resource
Chinese
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