以天然气作为碳源,以H2和N2为载气,采用等温化学气相沉积工艺制备碳/碳复合材料.采用偏光显微镜、SEM、万能试验机等表征所制备碳/碳复合材料的微观结构、密度变化和力学性能等.研究了碳源气体与载气比例对碳/碳复合材料致密化速率和热解碳微观结构以及力学性能的影响.结果表明:载气对碳/碳复合材料的致密化速率以及微观结构有重要影响(相对于不添加载气的情况,添加H2和N2的混合气体后,碳/碳复合材料的最终密度从1.42g/cm3提高到1.71g/cm3,而密度梯度△ρ从0.15g/cm3降到0.04g/cm3).H2对优化气相裂解成分,抑制致密化初期的表面结壳、促进高织构热解碳的形成有显著影响,而N2则对抑制致密化后期的表面结壳效果显著.
参考文献
| [1] | 浦保健;浦继强.飞机炭刹车盘的快速气相沉炭[J].新型炭材料,2000(4):27-29,26. |
| [2] | 肖鹏;徐永东;张立同;成来飞.旋转CVI快速沉积热解碳基体[J].硅酸盐学报,2000(2):181-183. |
| [3] | 程永宏;罗瑞盈;王天民.化学气相沉积（CVD）炭/碳复合材料（C/C）研究现状[J].炭素技术,2002(5):26-32. |
| [4] | 付东升;张康助;孙福林;姚冬梅.碳/碳复合材料的基体前驱体研究进展[J].化工新型材料,2003(6):19-21,29. |
| [5] | Zi Jun Hu;Klaus J. Huttinger.Mechanisms of carbon deposition-a kinetic approach[J].Carbon: An International Journal Sponsored by the American Carbon Society,20024(4):624-628. |
| [6] | Benzinger W.;Huttinger KJ..Chemical vapor infiltration of pyrocarbon - II. The influence of increasing methane partial pressure at constant total pressure on infiltration rate and degree of pore filling[J].Carbon: An International Journal Sponsored by the American Carbon Society,19987/8(7/8):1033-1042. |
| [7] | W. BENZINGER;K. J. HUETTINGER.CHEMICAL VAPOUR INFILTRATION OF PYROCARBON: Ⅰ. SOME KINETIC CONSIDERATIONS[J].Carbon: An International Journal Sponsored by the American Carbon Society,199612(12):1465-1471. |
| [8] | Benzinger W.;Huttinger K.J..Chemical vapor infiltration of pyrocarbon-III :the influence of increasing methane partial pressure at increasing total pressure on infiltration rate and degree of pore filling[J].Carbon: An International Journal Sponsored by the American Carbon Society,19992(2):181-193. |
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