SiC梯度涂层对掺杂石墨材料性能的影响

核聚变与等离子体物理 ›› 2007, Vol. 27 ›› Issue (3): 242-246.

SiC梯度涂层对掺杂石墨材料性能的影响

刘占军1,2，郭全贵1，史景利1，翟更太1，刘朗1

(1.中国科学院山西煤炭化学研究所炭材料重点实验室，太原 030001；2.中国科学院研究生院，北京 100039)

收稿日期:2006-09-21 修回日期:2007-06-17 出版日期:2007-09-15 发布日期:2011-08-15
作者简介:刘占军(1975-), 男, 山西太原人，博士研究生，主要从事高性能炭基复合材料的研究与开发。
基金资助:
国家自然科学重点基金资助项目(10205023)

Effect of SiC gradient coating on the properties of doped graphite

LIU Zhan-jun1, 2, GUO Quan-gui1, SHI Jing-li1, ZHAI Geng-tai1, LIU Lang1

(1. Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001; 2. Graduate University of the Chinese Academy of Sciences, Beijing 100039)

Received:2006-09-21 Revised:2007-06-17 Online:2007-09-15 Published:2011-08-15

摘要/Abstract

摘要：

利用化学气相反应法对掺杂石墨材料进行了SiC梯度涂层，研究了SiC梯度涂层对掺杂石墨材料热力学性能以及微观结构的影响。获得了约100μm 的SiC涂层，涂层后的材料导热性能下降，而机械强度有所增加。对涂层表面的物相成分分析表明，除了SiC之外，还有少量的单质Si。厚膜SiC梯度涂层的掺杂石墨材料在HT-7托卡马克装置中经等离子体放电实验后，SiC的颗粒形貌发生了明显的变化，涂层厚度下降到约30μm。

关键词: 掺杂石墨, SiC梯度涂层, 面对等离子体材料, 热导率

Abstract:

Thick SiC gradient coating on the surface of the doped graphite was prepared by chemical vapor reaction. The effect of SiC gradient coating on the thermo-mechanical properties as well as microstructure of the doped graphite was investigated. Results showed that the thermal conductivity of the doped graphite decreased, while the mechanical strength increased when the SiC was coated on the surface of the doped graphite with a thickness about 100μm. Phase composition analysis revealed: there were strong SiC diffraction peaks and weak Si diffraction peak for the coatings. Grain size and structure of SiC was changed, and thickness of the SiC coating decreased from 100μm to 30μm after discharge experiments in HT-7 device during the autumn operating season of 2005.

Key words: Doped graphite, SiC gradient coating, Plasma facing materials, Thermal conductivity

中图分类号:

TB383

刘占军1,2，郭全贵1，史景利1，翟更太1，刘朗1. SiC梯度涂层对掺杂石墨材料性能的影响[J]. 核聚变与等离子体物理, 2007, 27(3): 242-246.

LIU Zhan-jun, GUO Quan-gui, SHI Jing-li, ZHAI Geng-tai, LIU Lang. Effect of SiC gradient coating on the properties of doped graphite[J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2007, 27(3): 242-246.

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