TiC_(1-x)N_x燃烧合成的反应动力学研究  

Study on Reaction Kinetics for Synthesis of TiC_(1-x)N_x

作　　者：林晶晶[1] 章倩倩[1] 田能超[1] 王剑豪[1] 周晓[1] 马李[1] 

机构地区：[1]台州学院物理与电子工程学院,浙江台州318000

出　　处：《台州学院学报》2012年第6期7-12,26,共7页Journal of Taizhou University

基　　金：台州学院校立学生科研项目

摘　　要：基于差热测试、淬熄实验、微观组织及化学成分分析,研究了TiO2-Mg-C-N2体系燃烧反应机理。结果表明,该反应过程经由多个中间反应直至最后完成,Mg在650℃时开始熔化,TiO2和Mg在750℃左右开始发生剧烈的氧化还原反应,Ti和C、N2在1100℃发生反应,TiC和TiN在1300℃固溶合成TiC1-xNx。TiO2-Mg-C-N2体系燃烧反应为复杂的固-液-气反应,其过程为:TiO2颗粒与Mg熔体以溶解-析出机制反应生成Ti和MgO;反应放出的强热诱发Ti-C-N2之间的反应,以扩散反应机制生成TiC和TiN;TiC和TiN连续固溶生成TiC1-xNx固溶体。Based on DTA,quenching experimentation and microstructure analysis, the reaction mechanism for syn- thesis of TiCl-xNx was studied. The results showed that several medium reations had been involved in the reaction of TiO2-Mg-C-N2. Mg melts in 650℃, TiO2 reacted with Mg acutely in 750℃, and between the reactions of Ti-C- Nz were in 1100℃, and TiC reacted with TiN to form TiCl-xNx in 1300℃. The whole process is： TiO2 particles reacted with molten Mg to form Ti and MgO with dissolution-precipitation mechanism, and then the large heat released inducted the reaction of Ti-C-N2 to form TiC and TiN with diffusion reaction mechanism. Finally, TiC reacted with TiN to form solid solution TiC1-xNx

关 键 词：自蔓延高温合成 TiC1-xNx粉末 淬熄实验 微观组织 

分 类 号：TB39[一般工业技术—材料科学与工程]