Elastic Properties of Spark Plasma Sintered (SPS)ZrB2/SiC-Sm2Zr2O7 Composites
Due to extremely low oxygen transportation at elevated temperature,samarium zirconate (Sm2Zr2O7) with pyrochlore structure was introduced into ZrB2-based functional gradient composites as oxygen insulation.The elastic properties of composites with different phase ratio were investigated in this study.A series of nearly-fully dense ZrB2-based composites with different Sm2Zr2O7 content was consolidated by spark plasma sintering (SPS) technology.The microstructure and phase compositions were characterized by scanning electronic microscope and X-ray diffraction respectively.The dynamic elastic properties were obtained by resonance method at room temperature.The results revealed that the addition of Sm2Zr2O7 can significantly improve its densification for the refractory diboride,which mainly caused by the high sintering activity of Sm2Zr2O7.Youngs modules of the series of composites obviously decreased with the increasing content of Sm2Zr2O7.The low Youngs modulus of Sm2Zr2O7 was the main reason.The Youngs modules of the series of composites were calculated theoretically.The experimental results matched the theoretical data well.A little deviation appeared due to the continuous structure of Sm2Zr2O7 in the composites.
Elastic property Samarium zirconate Zirconium Diboride SPS
Zhenyu Yan Shizhen Zhu Qiang Xu Ying Liu
Beijing Institute of Technology,Beijing 100081,China;National Key Laboratory of Science and Technology on Materials under Shock and Impact
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
474-478
2011-11-04（万方平台首次上网日期，不代表论文的发表时间）