CAJ | 학술논문

采用铸渗复合原位反应技术制备TiC颗粒增强铁基复合材料,用SEM、XRD对复合材料的显微组织和物相组成进行观察分析,应用热、动力学原理对原位合成TiC的热、动力学过程进行了分析.热力学计算结果表明,在1138℃热处理能够原位合成TiC,体系中TiC优先于Fe3C和Fe2Ti形成,且在热力学上比Fe3C和Fe2Ti稳定.动力学分析结果表明,Ti-C反应受动力学过程控制,C的扩散是反应的控制步骤.
채용주삼복합원위반응기술제비TiC과립증강철기복합재료,용SEM、XRD대복합재료적현미조직화물상조성진행관찰분석,응용열、동역학원리대원위합성TiC적열、동역학과정진행료분석.열역학계산결과표명,재1138℃열처리능구원위합성TiC,체계중TiC우선우Fe3C화Fe2Ti형성,차재열역학상비Fe3C화Fe2Ti은정.동역학분석결과표명,Ti-C반응수동역학과정공제,C적확산시반응적공제보취.
In-situ synthesized TiC particulates reinforced iron matrix composites were prepared with the method of casting and heat treatment.The microstructure of the composite was analyzed by SEM,XRD.The mechanism of TiC fabricated by in-situ synthesis was analyzed by thermodynamics and kinetics principles.Thermodynamics calculation results show that TiC can be produced by in-situ synthesis sintering at 1138 ℃.The formation of TiC is ahead of the formation of Fe3C and Fe2Ti.TiC is more stable than Fe3C and Fe2Ti in thermodynamics.Kinetics analysis results show that Ti-C reaction is controlled by kinetic process,the diffusion of C atom could control the reaction step.