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采用反应自生法制备颗粒增强不同含 C量的 Ti- 11Al合金基复合材料。利用 X射线衍射、OM和 SEM研究复合材料的微观组织 ,结果表明 :当合金中的 C含量增加到一定程度后 ,合金的基体由 α+α2 两相变为单相 α2 基体 ;颗粒相由单一的 Ti C变为 Ti3Al C和 Ti C两相 ;颗粒形貌由短板条状向不发达树枝晶和等轴晶状发展。结合相图分析了组织变化的原因
The reaction-induced growth was used to prepare Ti-11Al alloy matrix composites reinforced with different C content. The microstructures of the composites were studied by X-ray diffraction, OM and SEM. The results showed that when the content of C in the alloy increased to a certain extent, the matrix of the alloy changed from α + α2 two phases to single-phase α2 matrix; Of TiC become Ti3AlC and TiC two phase; particle morphology from the short strip to the underdeveloped dendrites and equiaxed crystal development. Combined with phase diagram analysis of the causes of organizational changes