摘要
采用电泳沉积法在石墨基体上制备厚度可控的Si涂层,考察了电泳沉积参数(电压、沉积时间、固含量及添加剂量)对涂层沉积量的影响。所制备的Si涂层通过烧结与石墨基体发生在位反应形成SiC涂层。涂层成分的XRD分析表明烧结后生成β-SiC。用SEM观察涂层烧结前后的形貌,烧结后Si渗入基体内部。孔径分布数据表明所形成的SiC涂层导致石墨孔径变小。1200℃的抗氧化实验表明涂层起到了良好的防护作用。实验提供了一种制备C/SiC复合材料的新方法。
Thickness controllable Si coating was got on graphite substrate by electrophoretic deposition（EPD）.The effect of EPD parameters（given voltage,deposition time,additive volume,solid content） on deposits properties of nano-Si was obtained.SiC coating was formed by in-situ reaction which occurred between Si coating and graphite substrate in sintering progress.XRD of coating component showed β-SiC was formed after sintering.The surface morphologies of coating before and after sintering were observed by SEM,Si infiltrated into the graphite substrate.Graphite with SiC coating owned smaller pore size.SiC coating possessed good oxidation resistance after isothermal oxidation at 1200℃.A novel fabrication method of C/SiC composite materials was present by this work.
出处
《玻璃钢／复合材料》
CAS
CSCD
2010年第6期25-29,共5页
Fiber Reinforced Plastics/Composites
关键词
电泳沉积
烧结
SIC涂层
C/SIC复合材料
electrophoretic deposition
sintering
silicon carbide coating
C/SiC composite materials
