摘要
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.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2012年第10期1235-1238,1243,共5页
Journal of Functional Materials
基金
国家自然科学基金资助项目(51165006)
国家重点基础研究发展计划(973计划)资助项目(2011CB605804)
