西北工业大学材料学院,西安,710072
网络首发:2007-05-10,
纸质出版:2007
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李新涛, 李克智, 李贺军, 等. 化学液相气化沉积C/C复合材料的性能研究[J]. 西安交通大学学报, 2007,41(5):557-561.
李新涛, 李克智, 李贺军, et al. Process and Properties of C/C Composites by Chemical Liquid-Vaporized Infiltration[J]. 2007, 41(5): 557-561.
在不加和加入催化剂的条件下
采用化学液相气化沉积工艺分别在1000 ℃-10 h及900 ℃-8 h内制备出密度为1.67 g/cm
3
的大尺寸(110 mm×25 mm)C/C复合材料.不加催化剂制备的C/C复合材料主要以粗糙层为主
锥状结构明显
呈脆性断裂模式; 在加入催化剂的条件下
由于催化剂的存在能够增加C沉积时的形核点
降低C沉积温度
缩短沉积时间
所以制备的C/C复合材料均匀性增加
组织结构主要为光滑层和各向同性组织
断裂方式为台阶式假塑性断裂.热处理后两种材料的弯曲强度和模量都降低
石墨化度增加
而不加催化剂制备的复合材料的力学性能和石墨化度都高于加入催化剂条件下制备的复合材料.
The large size of C/C composites(110 mm×25 mm)with a density of 1.67 g/cm
3
were fabricated by chemical liquid-vaporized infiltration with and without catalyst at 1000 ℃ for 10 h and 900 ℃ for 8 h
respectively. The C/C composite with catalyst consists of smooth laminar and isotropic pyrocarbon
and exposes a pseudo-plastic pattern with a rough step-like fracture surface morphology
while the C/C composite without catalyst exhibits cone-like rough laminar pyrocarbon
and presents brittle fracture. In the case of catalyst
the deposition temperature and period are reduced due to the increase of nucleation sites of carbon deposition. Both flexural strength and modulus decrease and graphitization degree increases by heat treatment. Compared to the C/C composite with c
atalyst
the higher mechanical properties and graphitization degree are found for the C/C composite without catalyst.
Thurston G S, Suplinskas R J, Carroll T J, et al. Apparatus for densification of porous billets: USA, 5389152 [P]. 1995-02-04.
McAllister P, Wolf E E. Ni-catalyzed carbon infiltration of carbon-fiber substrates[J]. Carbon, 1992, 30(2):189-200.
Okuno H, Trinquecoste M, Derré A, et al. Catalytic effects on carbon-carbon composites fabricated by a film boiling CVI process [J]. Journal of Materials Research, 2002, 17(8):1904-1913.
孙万昌,李贺军,张秀莲. 高温处理对液相气化沉积炭/炭复合材料微观组织结构及力学性能的影响 [J]. 航空学报, 2002, 23(3): 276-278.
Sun Wanchang, Li Hejun, Zhang Xiulian. Influence of high temperature treatment on microstructure and mechanical properties of 2D-C/C composites prepared by liquid-vaporized processing[J]. Acta Aeronautica et Astronautica Sinica,2002, 23(3): 276-278.
Sun Wanchang, Li Hejun, Han Hongmei, et al. Microstructure of the pyrocarbon matrix prepared by the CLVI process[J]. Materials Science and Engineering: A, 2004, 369(1/2): 245-249.
Sohn K Y, Oh S M, Lee J Y. Failure behavior of carbon/carbon composites prepared by chemical vapor deposition[J]. Carbon, 1988, 26(2):157-162.
Rovillain D, Trinquecoste M, Bruneton E, et al. Film boiling chemical vapor infiltration: an experimental study on carbon/carbon composite materials[J]. Carbon, 2001, 39(9):1355-1365.
Wang Jiping, Qian Junmin, Qiao Guanjun, et al. Improvement of film boiling chemical vapor infiltration process for fabrication of large size C/C composite [J]. Materials Letters, 2006, 60(9/10): 1269-1272.
甄开吉, 王国甲, 毕颖丽,等.催化作用基础[M].北京:科学出版社, 2005: 3-8.
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