为分析碳源在化学气相渗透过程中的沉积机制,以碳纤维针刺整体毡为预制体,添加丙烯(C3H6)的天然气混合气体为碳源,研究了碳源组成对C/C复合材料致密化及热解炭结构的影响.结果表明:相比于以天然气为碳源,以添加了适当比例C3 H6的天然气为碳源,可有效提高C/C复合材料的致密化速率及密度分布均匀性;同时,有利于生成高织构的热解炭.最优条件(9vol％ C3H6)下沉积100 h后,C/C复合材料的密度和径向密度偏差分别为1.40 g/cm3和0.04 g/cm3,热解炭为均一的粗糙层结构,石墨化度高;而以天然气作碳源时,密度和径向密度偏差分别为1.17 g/cm3和0.07 g/cm3,热解炭为二元带状结构,石墨化度较低;当C3 H6比例增加到17vol％时,其密度和径向密度偏差分别为1.28 g/cm3和0.10 g/cm3,密度及密度分布均匀性较最优条件下制备的复合材料明显降低.
参考文献
| [1] | 李贺军.炭/炭复合材料[J].新型炭材料,2001(02):79-80. |
| [2] | 马立敏;张嘉振;岳广全;刘建光;薛佳.复合材料在新一代大型民用飞机中的应用[J].复合材料学报,2015(2):317-322. |
| [3] | 刘立洵;刘文训;黄玉东.炭/炭复合材料中的界面现象[J].炭素,1999(04):37-40,36. |
| [4] | 黄玉东;朱惠光;孙文训;张志谦;王俊山;许正辉.细编穿刺C/C复合材料不同层次界面特性研究[J].复合材料学报,2000(1):56-59. |
| [5] | 梁军;卢琦;阚晋;陈海龙.C/C复合材料液相浸渍制备工艺及其力学性能模拟[J].复合材料学报,2011(3):159-166. |
| [6] | 韩帅;段跃新;李超;肇研;罗辑.不同针织结构经编碳纤维复合材料弯曲性能[J].复合材料学报,2011(5):52-57. |
| [7] | 廖寄乔 .热解炭微观结构对C/C复合材料性能影响的研究[D].中南大学,2003. |
| [8] | V.De pauw;s.Kalhofer;D.Gerthsen.Influence of the deposition parameters on the texture of pyrolytic carbon layers deposited on planar substrates[J].Carbon: An International Journal Sponsored by the American Carbon Society,20042(2):279-286. |
| [9] | 熊杰;邹志强;汤中华;张红波;熊翔.载气对C/C复合材料CVI热解炭显微结构的影响[J].复合材料学报,2004(6):87-92. |
| [10] | Z.J.Hu;W.G.Zhang;K.J.Huttinger;B.Reznik;D.Gerthsen.Influence of pressure, temperature and surface area/volume ratio on the texture of pyrolytic carbon deposited from methane[J].Carbon: An International Journal Sponsored by the American Carbon Society,20034(4):749-758. |
| [11] | Hejun Li;Aijun Li;Ruicheng Bai.Numerical simulation of chemical vapor infiltration of propylene into C/C composites with reduced multi-step kinetic models[J].Carbon: An International Journal Sponsored by the American Carbon Society,200514(14):2937-2950. |
| [12] | R. Lacroix;R. Fournet;I. Ziegler-Devin.Kinetic modeling of surface reactions involved in CVI of pyrocarbon obtained by propane pyrolysis[J].Carbon: An International Journal Sponsored by the American Carbon Society,20101(1):132-144. |
| [13] | PJ.Meadows;E.Lopez-Honorato;P.Xiao.Fluidized bed chemical vapor deposition of pyrolytic carbon-II.Effect of deposition conditions on anisotropy[J].Carbon: An International Journal Sponsored by the American Carbon Society,20091(1):251-262. |
| [14] | Becker A.;Huttinger KJ..Chemistry and kinetics of chemical vapor deposition of pyrocarbon - IV - Pyrocarbon deposition from methane in the low temperature regime[J].Carbon: An International Journal Sponsored by the American Carbon Society,19983(3):213-224. |
| [15] | 汤中华;周桂芝;熊杰;邹志强.炭/炭复合材料石墨化度的XRD均峰位法测定[J].中国有色金属学报,2003(6):1435-1440. |
| [16] | 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. |
| [17] | Tang Zhong-hua;Xiong Xiang;Zhang Hong-bo.Effect of carrier gas on bulk density and microstracture distribution of carbon/carbon composites fabricated by thermal gradient chemical vapor infiltration[J].Carbon: An International Journal Sponsored by the American Carbon Society,20123(3):1243-1252. |
| [18] | Dong GL.;Huttinger KJ..Consideration of reaction mechanisms leading to pyrolytic carbon of different textures[J].Carbon: An International Journal Sponsored by the American Carbon Society,200214(14):2515-2528. |
| [19] | Koyo Norinaga;Olaf Deutschmann;Klaus J. Huttinger.Analysis of gas phase compounds in chemical vapor deposition of carbon from light hydrocarbons[J].Carbon: An International Journal Sponsored by the American Carbon Society,20069(9):1790-1800. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%