以甲烷为前驱体,碳布缝合织物为预制体,采用等温化学气相渗透(ICVI)工艺,在1 368 K温度和1 s滞留时间下制备了C/C复合材料.采用压汞仪表征不同致密化时间下预制体的孔隙分布,采用偏光显微镜观察热解碳的结构.结果表明:预制体的孔隙分布呈现多峰分布,热解碳的沉积速率与[A/V]值成反比,热解碳的结构与预制体的比表面积相关,沉积初期比表面积较大时,得到的热解碳织构为各相同性和低织构热解碳,随着沉积的进行,比表面积逐渐减小,在纤维束的边沿等部位出现了高织构热解碳.
参考文献
| [1] | Becker A;HüTtinger K .Chemistry and kinetics of chemical vapor deposition of pyrocarbon-Ⅱ pyrocarbon deposition from ethylene,acetylene and 1,3-butadiene in the low temperature regime[J].CARBON,1998,36(3):177-199. |
| [2] | Becker A;HüTtinger K .Chemistry and kinetics of chemical vapor deposition of pyrocarbon-Ⅴ influence of reactor volume/deposition surface area ratio[J].CARBON,1998,36(3):225-232. |
| [3] | ZHANG W;HüTtinger K .Densification of a 2D carbon fiber preform by isothermal,isobaric CVI:kinetics and carbon microstructure[J].CARBON,2003,41(12):2325-2337. |
| [4] | M.Guellali;R.Oberacker;M.J.Hoffmann;W.G.Zhang;K.J.Huttinger .Textures of pyrolytic carbon formed in the chemical vapor infiltration of capillaries[J].Carbon: An International Journal Sponsored by the American Carbon Society,2003(1):97-104. |
| [5] | Beatty;CARLSEN F;COOK J .Pyrolytic-carbon coatings on ceramic fuel particles[J].NUCL APPL,1965,1(6):560-566. |
| [6] | SAVAGE G.Carbon-carbon composites[M].Springer,1993 |
| [7] | 李新涛,赵高文,许正辉,杨文彬,杨晓光.缝合结构C/C复合材料的制备及组织[J].宇航材料工艺,2011(01):58-60,65. |
| [8] | 白瑞成,李贺军,付业伟,王兰英,卢锦花.预制体孔隙结构对炭/炭复合材料ICVI制备工艺的影响[J].炭素技术,2005(03):24-27. |
| [9] | ANTES J;HU Z;ZHANG W et al.Chemistry and kinetics of chemical vapour deposition of pyrocarbon:Ⅶ Confirmation of the influence of the substrate surface area/reactor volume ratio[J].CARBON,1999,37(12):2031-2039. |
| [10] | 张伟刚.化学气相沉积:从烃类气体到固体碳[M].北京:科学出版社,2007 |
| [11] | Zi Jun Hu;Klaus J. Huttinger .Mechanisms of carbon deposition-a kinetic approach[J].Carbon: An International Journal Sponsored by the American Carbon Society,2002(4):624-628. |
| [12] | Vignoles G L;GOYH N CHE J-M;S BASTIAN P et al.The film-boiling densification process for C/C composite fabrication:from local scale to overall optimization[J].Chemical engineering science,2006,61(17):5636-5653. |
| [13] | Zhang WG.;Hu ZJ.;Huttinger KJ. .Chemical vapor infiltration of carbon fiber felt: optimization of densification and carbon microstructure[J].Carbon: An International Journal Sponsored by the American Carbon Society,2002(14):2529-2545. |
| [14] | HU Z;ZHANG W;HüTHNGER K et al.Influence of pressure,temperature and surface area volume ratio on the texture of pyrolytic carbon deposited from methane[J].CARBON,2003,41(4):749-758. |
| [15] | Lieberman M;Pierson H .Effect of gas phase conditions on resultant matrix pyrocarbons in carbon/carbon composites[J].CARBON,1974,12(3):233-241. |
| [16] | Pierson h O;Lieberman M L .The chemical vapor deposition of carbon on carbon fibers[J].CARBON,1975,13(3):159-166. |
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%