以电镀Ni颗粒为催化剂,采用催化化学气相沉积（CCVD）法,在单向炭纤维（CF）表面原位生长碳化硅纳米纤维（SiCNF）,制备出SiCNF/CF共增强毡体。以此共增强毡体为前驱体,化学气相沉积碳后得到密度为1.7g/cm3的SiCNF改性C/C复合材料。复合材料力学性能测试表明,SiCNF改性可使C/C复合材料的抗弯强度、抗压强度和显微硬度明显提高。扫描电子显微镜和偏光显微镜观察表明,SiCNF改性处理改变了C/C复合材料中基体炭的结构,使其成为类似粗糙层（RL）或高织构的结构。
Using nickel granules as catalysts, straight SiC nano-fibers （SiCNF） were deposited in-situ on the surface of unilateralism carbon fibers by the method of catalytic chemical vapor deposition （CCVD）. The com- pound felts reinforced by SiCNF both and carbon fibers were prepared. With this felts as precursor, C/C com- posites （the density is around 1.7 g/crn3） was get by the method of CVD pyrogenation carbon （PyC）. The me- chanical property tests show that the C/C composites modified by SiCNF have higher flexural strength, com- pressive strength and rigidity. The observations by scanning electron microscope and polarization microscope in- dicate that the modified by SiCNF can change the structure of PyC matrix and form the rough layer （RL） struc- ture.
参考文献
| [1] | Windhorst T;Blount G .Carbon-carbon:a summary of resend developments and applications[J].Materials & Design,1997,18(01):11-15. |
| [2] | Kanari M.;Baba S.;Eto M.;Tanaka K. .NANOINDENTATION BEHAVIOR OF A TWO-DIMENSIONAL CARBON-CARBON COMPOSITE FOR NUCLEAR APPLICATIONS[J].Carbon: An International Journal Sponsored by the American Carbon Society,1997(10/11):1429-1437. |
| [3] | Baxter RI.;Iwashita N.;Sawada Y.;Rawlings RD. .Effect of chemical vapor infiltration on erosion and thermal properties of porous carbon/carbon composite thermal insulation[J].Carbon: An International Journal Sponsored by the American Carbon Society,2000(3):441-449. |
| [4] | 贺福.碳纤维及其复合材料[M].北京:科学出版社,2004 |
| [5] | 沈曾民.新型碳材料[M].北京:化学工业出版社,2003 |
| [6] | Hu Z J;Huttinger K J .Influence of pressure,tempera-ture and surface area/volume ratio on the texture of pyro-lytic carbon deposited from methane[J].Carbon,200a,41(04):749-758. |
| [7] | 孙万昌,李贺军,卢锦花,白瑞成,黄勇.不同层次界面对C/C复合材料断裂行为的影响[J].无机材料学报,2005(06):1457-1462. |
| [8] | 赵稼祥,王曼霞.复合材料用高性能炭纤维的发展和应用[J].新型炭材料,2000(01):68-75. |
| [9] | 徐先锋,肖鹏,许林,熊翔,黄伯云.碳化硅纳米纤维/炭纤维共增强毡体的制备[J].功能材料,2008(04):692-694. |
| [10] | Xu Xianfeng;Xiao Peng;Xiong Xiang et al.The con-trol of growth velocity and morphology of catalytic chemical vapor deposited SiC nano-fibers[J].Nonferrous Met Soc of China,2009,19(05):1146-1150. |
| [11] | 徐先锋;肖鹏;熊翔 等.一种碳化硅纳米纤维/炭纤维复合毡体的制备方法[P].中国专利:200810030854,9,2008-03-19. |
| [12] | GB/T 6569-2006.精细陶瓷弯曲强度试验方法[S].,2006. |
| [13] | GB/T 8489-2006.精细陶瓷压缩强度试验方法[S].,2006. |
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