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利用SEM、EDS对钢基复合材料的界面形貌特征、界面物相组成及物相析出规律进行研究,并对界面化合物层的厚度进行了测量。在此基础上,分析了钢-铝固-固界面反应物相的形核及生长的演变模式,讨论了界面化合物物相Fe2Al5的生长的动力学机制。结果表明:铝硅合金覆层试样界面化合物层较纯铝覆层试样生长缓慢,化合物相生成与反应活化能值、反应速率常数有关;在723～873 K条件下,化合物层厚度与化合物反应活化能成反比,与反应速率常数成正比,最终获得了金属间化合物相生长动力学模型。
The morphology, phase composition and phase precipitation of the steel matrix composites were investigated by SEM and EDS. The thickness of the interfacial compound layer was also measured. On this basis, the evolution mode of the nucleation and growth of the reactant phase of the steel-aluminum solid-solid interface was analyzed, and the kinetic mechanism of the growth of interphase compound phase Fe2Al5 was discussed. The results show that the interface layer of Al-Si alloy coating is slower than that of pure Al coating, and the phase formation of the Al-Si alloy is related to the activation energy and the reaction rate constant. Under the condition of 723-873 K, The activation energy is inversely proportional to the reaction rate constant is proportional to the final obtained intermetallic compound phase growth kinetics model.