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采用不同化学成分基体制备了原位合成 Ti C颗粒增强铁基复合材料 ,并以透射电镜为手段对其微观结构进行了分析研究。结果表明 ,Ti C增强相周围基体组织与基体含碳量有关 ,基体中较高的含碳量有助于抑制 Fe2 Ti相的形成 ,在含钼基体中 Ti C增强相与基体之间存在一富钼的包覆层 ,进一步改善了基体对碳化钛的润湿性 ,有利于增强体在基体中的均匀分布。
In situ synthesis of TiC particles reinforced iron matrix composites was prepared by using different chemical compositions, and its microstructure was analyzed by transmission electron microscopy. The results show that the content of carbon in the matrix around the TiC reinforcing phase is related to the carbon content of the matrix. The higher carbon content in the matrix helps to suppress the formation of Fe2 Ti phase. The molybdenum-rich cladding layer further improves the wettability of the matrix to the titanium carbide and facilitates the uniform distribution of the matrix in the matrix.