S042031 カーボンブラック添加によるC/C複合材料の高強度化([S04203]セラミックスおよびセラミックス系複合材料(3))

概要

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For the purpose of enhancing tensile strength of carbon/carbon (C/C) composites, an attempt was made to reduce the interfacial strength. Previous studies suggested that increase of fiber spacing (reduction of volume fraction) is one of the possible ways to do so. In this study, therefore, carbon black (CB) particles were incorporated between the carbon fibers to increase fiber spacing. In this process, CB particles were preliminary mixed with phenolic resin, in which a fiber bundle was dipped for impregnation, followed by the conventional resin-char process. It was found by microstructural observation that the CB particles were well dispersed in C/C composites and the fiber spacing was obviously increased by the CB addition. It was also suggested that the CB addition is effective to enhance tensile strength as shown in the tensile test results with 20wt% CB added specimen. Although magnitude of increase was rather low, the tensile strength of C/C composites is expected further enhanced by optimizing processing conditions.
一般社団法人日本機械学会の論文
2011-09-11