A STUDY ON DYNAMIC BEHAVIOR OFCf/SiCCOMPOSITES

作     者：IN SOO SON SANG PILL LEE 

作者机构：Department of Mechanical Engineering Dong-eui University 995 Eomgwangno Busanjin-Gu Busan 614-714 South Korea 

出 版 物：《International Journal of Modern Physics: Conference Series》 

年 卷 期：2012年第ijmpcs卷第6期

页      面：652-657页

学科分类：07[理学] 0702[理学-物理学] 

主　　题：C f / SiC Composite Liquid Phase Sintering Additive Materials Natural Frequency 

摘      要：The dynamic behavior for the fabrication of carbon fiber reinforced SiC matrix composites( C f / SiC ) is investigated by the theory and experiment. The governing differential equation of a composite beam is derived via Hamilton s principle. The C f / SiC composites have been fabricated by a liquid phase sintering process, using the ultra-fine SiC particles and oxide additive materials. The SiC based materials are fabricated by using a commercial SiC powder with an average size of about 0.3µm. An Al 2 O 3 - Y 2 O 3 - SiO 2 powder mixture is used as a sintering additive. The compositional ratio ( Al 2 O 3 / Y 2 O 3 ) and its total amount ( Al 2 O 3 + Y 2 O 3 ) of additive materials are 1.5 and 10 wt%, respectively. Especially, the content of PVB is changed from 0 wt% to 10 wt%. The SiC based materials are sintered at the temperature of 1820°C under 30 MPa for 1 hr. In this study, the effect of content of PVB on the natural frequency and mode shape is obtained. Finally, the relationship between natural frequency and mechanical property of C f / SiC composites is discussed.