燃烧合成AlN—SiC固溶体陶瓷

COMBUSTION SYNTHESIS (CS) OF AlN-SiC SOLID SOLUTION CERAMICS

在氮气氛中，点燃铝粉，硅粉和碳黑的混合粉末，合成AlN-SiC陶瓷研究了氮气压力和反应物配比对燃烧温度、燃烧波蔓延速度以及燃烧产物的影响．结合热力学分析，解释了AlN-SiC固溶体的形成机理及反应次序用扫描电镜观察了反应产物的形貌.

The feasibility of synthesizing AlN-SiC solid solution ceramics by combustion synthesis reaction is demonstrated through igniting the mixtures of aluminum, silicon, carbon black under difFerent nitrogen pressure. The effects of the nitrogen pressure and the ratio of Al/Si+C on the phase formation of product and the characteristics of combustion behavior were investigated. Combining thermodynamic analysis. the reaction sequence and reason for CS AlN-SIC solid solution were explained.