摘要
采用半固态搅拌铸造方法制备了SiCp粒径为20～50μm的SiCp／6061铝基复合材料，研究了SiCp粒径对铝基复合材料显微组织、力学性能及耐磨性能的影响。结果表明，随着SiCp粒径增大，SiCp在铝基复合材料内的分散均匀性提高，但铝基复合材料的抗拉强度和伸长率下降。铝基复合材料的断裂机制为SiCp与基体合金之间界面脱粘和SiCp断裂共同作用。复合材料的耐磨性随着SiCp粒径的增大而逐渐提高，其磨损机理为粘着磨损和磨粒磨损共同作用，且随着SiCp粒径的增大，磨粒磨损作用起主导作用。
The SiCp/6061 aluminum matrix composites with SiC particles in range of 20 to 50 μm were prepared by semi-solid stirring casting. Effects of SiC particle size on the microstructure and properties of SiCp/6061 aluminum matrix composites were investigated. The results indicate that the dispersion u- niformity of SiC particles in aluminum matrix composite is improved with increasing in SiC particle size, however, the tensile properties and elongation are decreased. Fracture mechanism of the composites is characterized by co-action of interfacial de-bonding and particle cracking. The particle crack plays a dom- inant role in crack mechanism with SiC particle size increase. With the increase of SiC particle size, wear resistance of SICJ6061 aluminum matrix composites is increased. The friction and wear mechanism can be described by adhesive wear and abrasive particles wear, and the abrasive wear will play the dominant role with increasing in SiC particle size.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2015年第6期614-618,共5页
Special Casting & Nonferrous Alloys
基金
广东省科技厅产学研结合项目(2012B091000092
2012B090600051)
关键词
半固态搅拌铸造
SICP
铝基复合材料
耐磨性能
Semi-solid Stirring Casting, SiC Particle, Aluminum Matrix Composites, Wear Properties
