使用XRD、EPMA和SEM等研究了SiC/Fe界面固相反应产物的相组成、反应区的显微结构以及反应区中反应物原子的浓度分布.SiC/Fe界面固相反应形成Fe3Si、Fe(Si)和石墨态C沉积物,Fe3Si的形成为该反应提供了足够的热力学驱动力.1100℃×3h热处理后,反应区由调整的C沉积物区/均匀的C沉积物区/无C沉积物区(从SiC侧至Fe侧)构成.建立SiC/Fe界面固相反应模型以解释SiC/Fe界面固相反应的微观机理.在SiC/Fe界面固相反应过程中,SiC分解是不连续的,从而在SiC界面前沿形成调整的C沉积物区独特结构.
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