Damping capacity of BaTiO3/Al composites fabricated by hot extrusion
To develop high damping metal matrix composites,large grain size Barium titanate (BaTiO3) ceramic was sintered and added into Al powder to fabricate BaTiO3/Al composites through the powder metallurgy method and hot extrusion.The damping properties of BaTiO3 ceramic,Al matrix and BaTiO3/Al composites was examined by Dynamic Mechanical Analysis in the temperature range from 273K to 573K.The results show that although BaTiO3 exhibits high damping (Tan(6)=0.12) below 400K,the damping capacity of 10 wt% BaTiO3/Al composites below 400K was not increased,compared to the Al matrix.On the other hand,the tensile strength of the composite was 42% increased from the Al matrix.The failure of exerting the intrinsic damping of BaTiO3 particles in the composites is attributed to the poor interface bonding between the particles and the matrix.
High damping materials metal matrix composites Barium titanate mechanical properties interface
Fan Genlian Li Zhiqiang Di Zhang
State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China
国际会议
上海
英文
41-41
2012-10-19（万方平台首次上网日期，不代表论文的发表时间）