α-Sialon-AlN多型体复相陶瓷的微观结构特性

Microstructural Characteristic of α'-AlN-polytypoids Multi-phase Sialon

通过XRD、SEM、EDS等方法，研究了添加Y2O3和Sm2O3的α－Sialon－AlN－多型体复相组份在热压过程中的致密化、相组成及微观结构的变化．结果表明，复相Sialon组份，AlN－多型体先于α－Sialon形成，且易发生偏聚，很难均匀分散在α－Sialon中，但是与通常不一样，α－Sialon易发育成长颗粒状．文中对长颗粒状的α－Sialon的形成进行了讨论．

The densification behavior, reaction sequence and microstructural development of (Y+Sm) α'-AlN-polytypoids multi-phase Sialon were studied by XRD, SEM and EDS. The results show that the AlN-polytypoids form earlier than α-Sialon and segregate together. The α-Sialon develops into elongated grains in this multi-phase Sialon. The mechanism of elongated α-Sialondeveloped was discussed.