C/C-Cu复合材料表面等离子喷涂钨涂层  

Coating tungsten on C/C-Cu composites surface by plasma spraying

作　　者：葛毅成[1] 彭可[1] 杨琳[1] 冉丽萍[1] 易茂中[1] 李文军[1] 彭芬[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《粉末冶金材料科学与工程》2010年第2期136-140,共5页Materials Science and Engineering of Powder Metallurgy

基　　金：国家重点基础研究发展规划(973计划)资助项目(2006CB600906);湖南省自然科学基金资助项目(09JJ4027)

摘　　要：采用等离子喷涂技术,在C/C-Cu复合材料表面制备W涂层,采用氧乙炔焰进行烧蚀考核,通过金相显微镜、扫描电镜及X射线衍射仪对烧蚀前后涂层的显微组织及相组成进行分析,并与没有W涂层的C/C-Cu复合材料进行对比。结果表明,熔蚀后有涂层的C/C-Cu复合材料质量损失仅0.9 mg/s,无涂层C/C-Cu试样的质量损失为5.6 mg/s。C/C-Cu复合材料表面W涂层较致密,与基体结合良好。烧蚀后C/C-Cu表面W涂层主要生成WO3和CuWO4,能谱分析(EDAX)表明有较多的Cu元素存在,但分布不均匀。W涂层在烧蚀后均较粗糙、疏松,存在孔洞和裂纹等缺陷,成为降低性能的重要因素。Tungsten coating（W-coating） was fabricated by plasma spraying technique on the surface of carbon fiber reinforced carbon-copper double phase matrix composite（C/C-Cu）.The microstructure and phase analysis of W-coated C/C-Cu composites before and after ablation-testing have been investigated by metallographic microscope,scanning electron microscopy（SEM） and X-ray diffraction（XRD）.The results of ablation-testing using oxyacetylene show that the mass loss ratio of the W-coated C/C-Cu is 0.9 mg/s including the ablation and gasification of the W-coating and the oxidation of the C/C-Cu on other surfaces without coating,which is still much lower than that of uncoated C/C-Cu of 5.6 mg/s.SEM and metallographic images before the ablation show that the coating is formed by many compactly piled up particles and has good bonding with the matrix.After the test,XRD patterns indicate that WO3 and CuWO4 are the main product in the coating,EDAX discover much copper elements exist on the surface unevenlyMany holes and cracks exist on the rough surface of the coating,which might be one important reason for degenerate the ablation-resistance of the coating.

关 键 词：复合材料 钨涂层 等离子喷涂 烧蚀 

分 类 号：TB332[一般工业技术—材料科学与工程] TH145.1[机械工程—机械制造及自动化]