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C/SiC 복합재의 기계적 특성에 미치는 초기 기공의 영향
손동영(Son Dong-Young),배동현(Bae Dong-Hyun),손용규(Son Young-Gyu),배동수(Bae Dong-Su) 동의대학교 정보통신연구소 2004 정보통신연구지 Vol.5 No.-
Four kinds of raw C/C composites with a density between 1.2S-1.66g/cm² were used in order to investigate the effect of the initial porosity of C/C composites on mechanical properties of liquid silicon infiltrated C/SiC composites. The microstructure observation, image analysis and flexural strength test of the composites were performed. The density and microstructural changes with the variation of the initial porosity was discussed in the terms of the infiltration behavior of liquid silicon.
액상 Si 함침 공정에 의해 제조된 C/SiC 복합재의 고온부식거동
손동영(Son Dong-Young),배동현(Bae Dong-Hyun),손용규(Son Young-Gyu),배동수(Bae Dong-Su) 동의대학교 정보통신연구소 2004 정보통신연구지 Vol.5 No.-
Raw C/C composite was used in order to investigate the effect of the erosion behavior of the C/C composite manufactured by the melt silicon infiltration process at the high temperature. The microstructure observation, image analysis and flexural strength test of the composite was performed. The density and microstructural changes with the variation of the initial porosity was discussed in the terms of the reaction between liquid silicon and matrix carbon.
고온 프레스법에 의한 TiNi/Al2024 복합재료의 제조 및 기계적 특성평가
손용규(Yong-Kyu Son),배동수(Dong-Su Bae),박영철(Young-Chul Park),이규창(Gyu-Chang Lee) 한국소성·가공학회 2009 소성가공 : 한국소성가공학회지 Vol.18 No.1
Shape memory alloy has been used to improve the tensile strength of composite by the occurrence of compressive residual stress in matrix using its shape memory effect. In order to fabricate shape memory alloy composite, TiNi alloy fiber and Al2024 sheets were used as reinforcing material and matrix, respectively. In this study, TiNi/Al2024 shape memory alloy composite was made by using hot press method. In order to investigate bonding condition between TiNi reinforcement and Al matrix, the micro-structure of interface was observed by using optical microscope and diffusion layer of interface was measured by using Electron Probe Micro Analyser. And the mechanical properties of composite with three parameters(volume fraction of fiber, cold rolling amount and test temperature) were obtained by tensile test. The most optimum bonding condition for fabrication the TiNi/Al2024 composite material was obtained as holding for 30min. under the pressure of 60MPa at 793K. The strength of composite material increased considerably with the volume fraction of fiber up to 7.0%. And the tensile strength of this composite increased with the reduction ratio and it also depends on the volume fraction of fiber.