SiC/Al2O3/Vinyl-Ester 복합재료의 기계적 특성 및 파괴거동에 미치는 강화재입자의 영향에 관한 연구

Abstract

Particle reinforced composites are materials that have enhanced physical properties by adding particle reinforcements to polymer materials and have been applied to a wide range of fields such as the aerospace, bio-technology and automative industry. In this study, particle reinforced composites were prepared by mixing SiC/Al2O3 to the vinyl ester as the thermoset resin. The purpose of this study is to evaluate mechanical properties and fracture behavior by tensile test and single edge notch specimen according to the addition ratio of reinforcement. Addition of 1 and 2 wt.% of the particle reinforcement to the vinyl-ester resin was effective for strength improvement. However, when it was more than 3 wt.%, its strength was decreased. Also the highest elastic modulus obtained as 3.19 GPa was found at the 2 wt.% addition of reinforcement. Futhermore the fracture toughness was evaluated by the energy release rate and the maximum critical energy release rate was obtained when 1 wt.% reinforcement. The results show that the limit of adding of SiC/Al2O3 for improvement of the mechanical and fracture performance is 2 wt.% reinforcement particles.