消失模铸造SiC_p铝基复合材料的性能

Properties of Lost Foam Casting SiC_p/Al Composites

基于消失模铸造技术,以SiC_p增强铝基复合材料为研究对象,研究不同SiC_p浓度、粒度的磨削层断口磨粒的分布情况及基体与SiC_p磨粒的结合情况。结果表明,加入不同浓度与粒度的SiC_p不会影响复合材料基体的显微组织;随着SiC_p含量增大,基体与SiC_p间的结合并没受到影响;在相同颗粒粒度下,SiC_p含量越高,材料实际抗弯强度越小;在相同浓度下,随着SiC_p粒度变大,抗弯强度先增大后减小。结果表明,在含46目SiC_p粒度的复合材料,具有较高的抗弯强度。

Effects of SiC particle content on microstructure and properties of lost foam casting SiC particle reinforced aluminum matrix composites were investigated.The result reveal that microstructure of the composites prepared is independent on the SiC particle content and size.In addition,the bonding strength between matrix and the SiC particle is independent of the particle size.With SiC content increase,the bending strength of the composites with the same particle size is decreased,while at the same SiC particle content,with increasing in particle size,the bending strength of the composites exhibits increased firstly and then decreased.The composites with 46 mesh SiC content have the higher bending strength.