Electrical and Mechanical Properties of ZrB2-based Composite Ceramic
The ZrB2-SiC composite ceramic was prepared using Al2O3 and Y2O3 as additives through pressureless sintering under 1800℃.The electrical and mechanical properties were studied with the different mass ratio of ZrB2 and SiC.The microstructure and phase transformation of the ZrB2-SiC composites ceramic were characterized by scanning electron microscopy.Results show that the densities of the samples are decreased with the decrease of the mass ratio of ZrB2 and SiC while the resistivities are increased.When the mass ratio of ZrB2 and SiC is 4 the resistivity reaches 14μΩ·mm while the density is 4.85g/cm3.When the mass ratio of ZrB2 and SiC is 13∶7,the flexural strength reaches the max value and toughness reaches the minimum value.The flexural strength is 233MPa and the toughness is 4.51 MPa· m1/2.The changes of the properties of the ceramic were analyzed through the microstructure and the conduction mechanism was studied.
electrical property resistivity pressureless sintering ZrB2-based ceramic
Yan-yan Wang Kai Liu Chang-ling Zhou Chong-hai Wang Rui-xiang Liu Yi-na Luan
Shandong Research & Design Institute of Industrial Ceramics,Zibo 255031,China Air Force Military Representative Office of Shandong Province,Jinan 250023
国际会议
The Seventh China International Conference on High-Performance Ceramics (第七届先进陶瓷国际研讨会(CICC-7))
厦门
英文
744-747
2011-11-04（万方平台首次上网日期，不代表论文的发表时间）