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石墨电极表面氩弧熔覆原位合成ZrB2-SiC/Si 抗氧化涂层

王振廷, 朱士奎, 冯帆

王振廷, 朱士奎, 冯帆. 石墨电极表面氩弧熔覆原位合成ZrB2-SiC/Si 抗氧化涂层[J]. 焊接学报, 2015, 36(8): 55-58.
引用本文: 王振廷, 朱士奎, 冯帆. 石墨电极表面氩弧熔覆原位合成ZrB2-SiC/Si 抗氧化涂层[J]. 焊接学报, 2015, 36(8): 55-58.
WANG Zhenting, ZHU Shikui, FENG Fan. Research of in-suit synthesis of ZrB2-SiC/Si high temperature oxidation resistant coating on graphite by argon arc cladding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2015, 36(8): 55-58.
Citation: WANG Zhenting, ZHU Shikui, FENG Fan. Research of in-suit synthesis of ZrB2-SiC/Si high temperature oxidation resistant coating on graphite by argon arc cladding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2015, 36(8): 55-58.

石墨电极表面氩弧熔覆原位合成ZrB2-SiC/Si 抗氧化涂层

基金项目: 江苏省大型工程装备检测与控制重点建设实验室开放课题资助项目(JSKLEDC201201);黑龙江省教育厅科学技术研究资助项目(12541705)

Research of in-suit synthesis of ZrB2-SiC/Si high temperature oxidation resistant coating on graphite by argon arc cladding

  • 摘要: 为了增强石墨在高温条件下的抗氧化性,采用氩弧熔覆技术,以硅粉、锆粉和B4C粉为原料在石墨电极表面制备原位合成ZrB2-SiC/Si抗氧化涂层.利用扫描电子显微镜(SEM)、X射线衍射仪(XRD)对涂层进行组织分析和物相分析,并对涂层的抗氧化性能进行了测试和研究.结果表明,涂层由ZrB2,SiC和Si组成,高温下氧化生成ZrO2和SiO2,阻止涂层材料进一步的氧化.抗氧化涂层与石墨基体结合良好,无气孔裂纹等缺陷,涂层中竹节状的ZrB2枝晶与颗粒状的SiC分布均匀,在1500℃条件下灼烧10 h,氧化失重仅为0.72%.
    Abstract: In order to improve the high temperature oxidation resistance of graphite, ZrB2/SiC composite coating was fabricated on the surface of graphite electrode by argon arc cladding using the Si, Zr and B4C blended powders. The microstructure and phase composition of the clad layer were researched by using scanning electron microscopy(SEM) and X-ray diffraction analysis(XRD). The result shows that the coating consisted of ZrB2, SiC and Si. ZrO2 and SiO2 were formed under high temperature which prevent further oxidation of the coating.The bonding of the cladding layer and the graphite matrix was good with a continuous interface without visible defects.The bamboo like ZrB2 and granular SiC were uniform distributed in the coating. After burning 10h at 1500℃, the oxidation weight loss rate is 0.72%.
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  • 收稿日期:  2014-08-28

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