Synthesis of Ti_3SiC_2/TiB_2 Composite by In-situ Hot Pressing (HP) Method

• 作 者: 周卫兵
• 机 构: School of Materials Science and Engineering,Wuhan University of Technology,State Key Laboratory of A
• 出 处: Journal of Wuhan University of Technology(Materials Science
• 发表日期: 2008年06期
• 关键词: equiaxed elongated exceed layered Pressing pressing toughness structured grains

Ti3SiC2/TiB2 composite was successfully obtained by hot pressing Ti/TiC/Si/B4C power mixtures.Volume fraction of TiB2 in Ti3SiC2/TiB2 composite can not exceed 10%.Incor-poration of excessive TiB2 will affect the reactions process.TiC and Ti5Si3 were two important in-termediate phases during the whole reactions.The microstructure characteristics of the Ti3SiC2/TiB2 composites were analyzed using scanning electron microscopy (SEM) and transmission electron microscopy (TEM).The experimental results show that the grains of Ti3SiC2/TiB2 composite are structured in a layered form,and the formation of TiB2 particles as reinforcements with elongated or equiaxed shape distributes in Ti3SiC2 matrix.

Ti3SiC2 / TiB2 composite was successfully obtained by pressing pressing force Ti / TiC / Si / B4C power mixtures. Volume fraction of TiB2 in Ti3SiC2 / TiB2 composite can not exceed 10% .Incor-poration of excessive TiB2 will affect the reactions process.TiC and Ti5Si3 were two important in-termediate phases during the whole reactions. microstructure characteristics of the Ti3SiC2 / TiB2 composites were analyzed using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The experimental results show that the grains of Ti3SiC2 / TiB2 composite are structured in a layered form, and the formation of TiB2 particles as reinforcements with elongated or equiaxed shape distributed in Ti3SiC2 matrix.