石墨表面化学沉积碳化硅膜及膜层质量分析
|
摘要
采用一甲基三氯硅烷(CH_3SiCl_3,MTS)和高纯氢气(H_2)为原料,通过化学气相沉积技术(CVD)在石墨基体表面沉积了一层碳化硅(SiC)膜。采用扫描电子显微镜(SEM)和能谱分析(EDS)对膜层断面的显微结构和元素组成进行了观察和分析,采用金相显微镜和表面粗糙度轮廓仪对膜层的表面微观形貌和表面粗糙度进行了观察和测试,采用排水法对膜层密度进行了测试。结果表明,采用密度1.88 g/cm~3、三点抗弯强度为79.30 MPa的高致密度、高强度石墨作为基体材料时,在优化的CVD工艺条件下制备的SiC膜层密度为3.193 g/cm~3,气孔率为0.50%,膜层表面粗糙度Ra=1.0157μm。
A silicon carbide(SiC) coating was deposited on the surface of graphite substrate by chemical vapor deposition(CVD) using methyltrichlorosilane(CH_3SiCl_3, MTS) and high-purity hydrogen(H_2) as raw materials. The microstructure of the SiC coating was observed by scanning electron microscopy(SEM) and the elements composition of it was analyzed by energy spectrum analysis(EDS). The surface microstructure was observed by the metallographic microscope, the surface roughness data was obtained by the surface roughness profiler, and the density of the SiC coating was tested by the drainage method. The results show that, when using as a substrate material a high density, high strength and high uniformity graphite, for example, the granite with the density of 1.88 g/cm~3 and three-point flexural strength of 79.30 MPa, a high quality SiC coating could be prepared under an optimized process conditions, its density, porosity and surface roughness being 3.193 g/cm~3, 0.50 % and 1.0157 μm, respectively.
A silicon carbide(SiC) coating was deposited on the surface of graphite substrate by chemical vapor deposition(CVD) using methyltrichlorosilane(CH_3SiCl_3, MTS) and high-purity hydrogen(H_2) as raw materials. The microstructure of the SiC coating was observed by scanning electron microscopy(SEM) and the elements composition of it was analyzed by energy spectrum analysis(EDS). The surface microstructure was observed by the metallographic microscope, the surface roughness data was obtained by the surface roughness profiler, and the density of the SiC coating was tested by the drainage method. The results show that, when using as a substrate material a high density, high strength and high uniformity graphite, for example, the granite with the density of 1.88 g/cm~3 and three-point flexural strength of 79.30 MPa, a high quality SiC coating could be prepared under an optimized process conditions, its density, porosity and surface roughness being 3.193 g/cm~3, 0.50 % and 1.0157 μm, respectively.
引文
[1]徐世江,康飞宇.核工程中的碳和石墨材料[M].清华大学出版社,2010:120-133.
[2]边炳鑫.石墨加工与石墨材料[M].中国矿业大学出版社,2014:1-39.
[3]韩永军,燕青芝,刘维良,等.石墨含量对碳化硅复合材料机械性能及摩擦性能的影响[J].陶瓷学报,2015,(2):138-142.HAN Y J,YAN Q Z,LIU W L,et al.Journal of Ceramics,2015,(2):138-142.
[4]刘海林,霍艳丽,胡传奇,等.光刻机用精密碳化硅陶瓷部件制备技术[J],现代技术陶瓷,2016,37(3):168-178.LIU H L,HUO Y L,HU C Q,et al.Advanced Ceramics,2016,37(3):168-178.
[5]王子晨,阮万兴,郭兴忠,等.液相渗硅制备碳化硅/石墨复合陶瓷材料[J].陶瓷学报,2016,37(5):498-503.WANG Z C,RUAN W X,GUO X Z,et al.Journal of Ceramics,2016,37(5):498-503.
[6]PIERSON H O.Handbook of Chemical Vapor Deposition(CVD):Principles,Technology and Applications[M].Norwich,New York,USA:William Andrew Publishing,LLC,1992:1-11.
[2]边炳鑫.石墨加工与石墨材料[M].中国矿业大学出版社,2014:1-39.
[3]韩永军,燕青芝,刘维良,等.石墨含量对碳化硅复合材料机械性能及摩擦性能的影响[J].陶瓷学报,2015,(2):138-142.HAN Y J,YAN Q Z,LIU W L,et al.Journal of Ceramics,2015,(2):138-142.
[4]刘海林,霍艳丽,胡传奇,等.光刻机用精密碳化硅陶瓷部件制备技术[J],现代技术陶瓷,2016,37(3):168-178.LIU H L,HUO Y L,HU C Q,et al.Advanced Ceramics,2016,37(3):168-178.
[5]王子晨,阮万兴,郭兴忠,等.液相渗硅制备碳化硅/石墨复合陶瓷材料[J].陶瓷学报,2016,37(5):498-503.WANG Z C,RUAN W X,GUO X Z,et al.Journal of Ceramics,2016,37(5):498-503.
[6]PIERSON H O.Handbook of Chemical Vapor Deposition(CVD):Principles,Technology and Applications[M].Norwich,New York,USA:William Andrew Publishing,LLC,1992:1-11.