摘要
研究了喷射沉积8009Al/SiCp复合材料楔形压制致密化规律,通过光学显微镜(OM)、扫描电镜(SEM)、密度和硬度测试等手段研究了楔形压制过程中复合材料致密化机理。结果表明,多孔复合材料在楔形压制过程中,同时存在致密化和塑性变形两种现象,压制初期主要是致密化;多孔坯不同位置的致密度存在差异且表面摩擦力对致密化有影响;复合材料塑性变形过程中,孔洞及团聚的碳化硅粉末随基体金属的塑性流动得到破碎与分散。
Densification regularity of spray deposited 8009Al/SiCp composites during wedge pressing was investigated.The densification mechanism of composites was studied using optical microscope(OM),scanning electronic microscope(SEM),density measurement and Brinell hardness testing.The results show that the composites exhibited the combination phenomena of densification and plastic deformation during wedge pressing,and the densification played a major role at the early stage.The density varied at different locations and the surface friction effected densification process.Pores and the aggregated SiC particles are broken and dispersed with matrix metal flow during the wedge pressing.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2014年第1期25-28,共4页
Journal of Materials Science and Engineering
基金
湖南省自然科学基金资助项目(12JJ3048
14JJ5015)
湖南省教育厅资助项目(12C0124)
关键词
楔形压制
致密化
喷射沉积
铝基复合材料
wedge pressing
densification
spray deposition
aluminum matrix composite
