摘要
采用无压浸渗法制备出不同体份的SiCP/Al复合材料。对该复合材料进行了高温(高于基体熔点)压缩实验。研究了不同颗粒含量及粒度规格的复合材料高温压缩流变规律,利用SEM观察分析了颗粒含量及粒度对复合材料组织的影响。研究结果表明:颗粒含量较高的SiCP/Al复合材料,在高温压缩过程中呈现为塑性流变规律;颗粒粒度规格对复合材料高温压缩的影响呈两个阶段;颗粒含量及粒度对SiCP/Al复合材料高温压缩后组织的影响与其流变规律一致;颗粒含量为55%、粒度规格为F220的SiCP/Al复合材料,在高温压缩过程中呈现伪塑性流动规律,高温压缩对其颗粒分布均匀性及尺寸的作用较其他复合材料明显。
SiCP/Al Composites with various volume fraction were prepared by pressureless infiltration.Hot（above melting point of matrix） compression on the composite was tested.The flow stress behavior of composite with different contents and granularitie standards was rearched.Effects of particle content and granularity on microstructure of SiCP/Al composite with high volume fraction were observed and analyzed by using SEM.The results show that： SiCP/Al Composite with Higher Fraction shows Pseudo-plastic deformation during hot compression;Effect of particle granularity on the flow stress has two steps;The effecting law of particle content and granularity on microstructure of SiCP/Al Composite conforms to its flow stress behavior;SiCP/Al Composite with 55% Fraction and F220 granularity standard shows Pseudo-plastic deformation during hot compression,effects of hot compression on particle disbution and size are more obvious than other composites.
出处
《航空材料学报》
EI
CAS
CSCD
北大核心
2011年第1期56-61,共6页
Journal of Aeronautical Materials
基金
国家863项目(2007AA03Z544)
