Abstract:With 3K PAN-based carbon fibers as reinforcing materials and with mesophase pitch as matrix precursor, mesophase pitch-based 2D carbon-carbon composites were obtained by pressure impregnation carbonization technology under different carbonization pressure. The morphology, flexural property and fractured surface were analyzed. The result shows that the morphology of matrix carbon changes with different carbonization pressure. The morphology shows small domains under low carbonization pressure, and domains under carbonization pressure respectively. The flexural strength and density of C/C composites increase with increasing carbonization pressure, and the flexural strength is up to 278MPa. The fractured characters of C/C are related to density and inferface bonding strength. The fractured surfaces are made of fracture and pulling out of fiber when the density is high and the bonding is moderate,materials have toughness character.
[1] 李贺军.碳/碳复合材料[J].新型碳材料,2001,16(2):79-80. [2] SAVAGE G.Carbon-carbon composites[M].London:Chapman & Hall,1993.31-35. [3] MORIMOTO T,OGURA Y,KONDO M,et al.Multilayer coating for carbon/carbon composites[J].Carbon,1995,33 (4):351-357. [4] PARTHA P PAUL,STUART T SCHWAB.Carbon materials obtained from organometallic modification of pitch and its oxidation resistance properties[J].Carbon,1996,34(1):89-95. [5] 李贺军.一种超高压制备碳/碳复合材料的方法和装置[P].中国专利:95124935.5,1995-06-08. [6] 孙乐民,李贺军,张守阳.沥青基碳/碳复合材料的组织特性[J].无机材料学报,2000,15(6):1111-1116. [7] MANOCHA L M,WARRIER A,MANOCHA S,et al.Microstructure of carbon-carbon composites reinforced with pitch-based ribbonshape carbon fibers[J].Carbon,2003,41:1425-1436. [8] 孙乐民,李贺军,张守阳.沥青基碳/碳复合材料的弯曲断裂特征[J].新型碳材料,2001,16(3):28-31. [9] LEE K J,CHEN Z Y.Microstructure study of PAN-pitch-based carbon-carbon composite[J].Materials Chemistry and Physics,2003,82:428-434.