摘要
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 fabricated by the matrix-coated fiber （MCF） process under two different hot isostatic pressing （HIP） processing parameters. Both microstructural characteristics and grain growth behavior in the matrix were investigated based on a combination of experimental observations and theoretical predictions. The main microstructural characteristics including matrix component phases and their corresponding chemical composition, morphology and volume fraction were systematically examined using EDS and SEM analyses, providing valuable insight into understanding the matrix microstructural evolution during consolidation processing from initial Ti-6Al-4V matrix-coated fibers （MCFs） to the final SiCf/Ti-6Al-4V composites. A dynamic recrystallization （DRX） model coupled with Lifshitz-Slyosov-Wagner （LSW） theory were also used to predict the grain growth occurring in the matrix during consolidation processing. Correlation between the theoretical predictions and experimental results were also discussed.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2014年第8期1839-1845,共7页
Rare Metal Materials and Engineering
基金
National Natural Science Foundation of China(51071122,51271147,51201134 and 51201133)
关键词
钛基复合材料
基体涂层纤维
显微组织
晶粒长大
titanium matrix composites （TMCs）
matrix-coated fibers （MCFs）
microstructure
grain growth
