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Coal Tar Pitch-Asjphaltene을 Matrix-Precursor로 한 탄소/탄소 복합체의 性質
김희락,오재원 大田工業大學 1991 한밭대학교 논문집 Vol.8 No.2
The result of the experiment of properties carbon-carbon composite in which we used asphaltene extracted from coal tar pitch as matrix-precursor are as follow : when green composite filled up with carbon- fibre was carbonized, the shrinkage rate was under 1% toward the axis-direction of fibre and about 3.2 through 5.6% towatd 90˚-direction of fibre. The prominent increase of the density of the specimen by the impregnation process was seen when the specimen was recarbonized after the 1st and 2nd impregnation. Flexual strength of carbon-carbon composite was increased with the filling -up rate of fibre and frequency of impregnation, and flexural strength -560 MN / m^2 and flexural modulus showed 460GN / m^2 by the 3rd impreganation and recarbonization.
Coal Tar Pitch-Asphaltene을 Binder로 한 Carbon-Materials 제조 및 物性에 관한 硏究
김희락,오재원 大田工業大學 1990 한밭대학교 논문집 Vol.7 No.2
The results of the experiment of properties of carbon-materials in which we used asphaltene extracted from coal tar pitch as binder are as follows : When asphaltene extracted from coal tar pitch was carbonized to 900℃ in nitrogen atmosphere, the carbon yield of 65% was seen. When green composite filled up with 50% graphite was carbonized, the linear shrinkage rate was about 2.1%. When specimen was made from extrusion molding more than hot-press molding, the result was appeared with the higher flexural strength.