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在两种不同的热等静压工艺参数下采用基体涂层纤维法(MCF)制备了SiCf/Ti-6Al-4V复合材料。基于实验观察和理论分析研究了复合材料基体的显微组织特征和晶粒长大行为。采用EDS和SEM分析技术研究了基体的相组成及相应的化学成分、形貌和体积分数等主要显微特征,为Ti-6Al-4V基体涂层纤维(MCFs)热压成SiCf/Ti-6Al-4V复合材料过程中基体显微组织演化提供了一定的参考依据。此外,基于Lifshitz-Slyosov-Wagner(LSW)动态再结晶模型预测了热等静压过程中基体的晶粒长大行为,并讨论了理论预测与实验结果之间的关系。
The SiCf / Ti-6Al-4V composites were prepared by the matrix coating fiber method (MCF) under two different hot isostatic pressing parameters. The microstructure and grain growth behavior of composite matrix were studied based on experimental observation and theoretical analysis. The main microstructures of the matrix, such as the phase composition and the corresponding chemical composition, morphology and volume fraction, were investigated by EDS and SEM. The microstructures of SiCf / Ti-6Al films were obtained by hot pressing Ti-6Al-4V matrix coated fibers (MCFs) -4V composite materials in the process of microstructure evolution provides a reference. In addition, based on the Lifshitz-Slyosov-Wagner (LSW) dynamic recrystallization model, the grain growth behavior of the matrix during hot isostatic pressing was predicted, and the relationship between theoretical prediction and experimental results was discussed.