SiC颗粒增强2A02Al基复合材料组织和性能的研究  

Research on microstructure and properties of SiC particle reinforced 2A02Al matrix composites

作　　者：董海涛[1] DONG Haitao(Shanxi Institute of Mechanical&electrical Engineering,Changzhi 046011,China)

机构地区：[1]山西机电职业技术学院,山西长治046011

出　　处：《粉末冶金工业》2022年第3期91-95,共5页Powder Metallurgy Industry

基　　金：山西省教育科学“十三五”规划2020年度教育政策研究专项课题(项目编号:ZC20066)。

摘　　要：采用热压烧结工艺制备了30%SiCp/2A02Al复合材料,对烧结试样进行热挤压变形,利用OM、SEM和TEM观察了复合材料微观组织和断口形貌,并检测了密度和力学性能。结果表明:SiCp/2A02Al复合材料的基体与增强体界面结合良好,界面清晰平滑;热挤压后SiC颗粒偏聚减少,SiC均匀分布在基体中,在基体内生成了高密度位错和亚晶;复合材料的致密度增加,力学性能显著提高;热挤压试样经过时效处理后在基体内生成了圆盘状的沉淀析出相(Al_(2)Cu相)。The 30% SiCp/2A02A1 composite was prepared by hot-press sintering process. The sintered sample was hot pressed. The microstructure and fracture morphology of the composite were observed by OM, SEM and TEM, and the density and mechanical properties were measured respectively. The results show that the interface between SiCp/2A02A1 composite and reinforcement is well combined with clear and smooth boundry. After hot extrusion, the segregation of SiC particles decreases, and SiC is uniformly distributed in the matrix, and high density dislocation and subgrain are formed in the matrix. The density and mechanical properties of the composites increased significantly. After aging treatment, disc-shaped precipitation-Al2Cu phase is formed in the matrix of hot extrusion sample.

关 键 词：SiCp/2A02Al复合材料 热挤压 力学性能 显微组织 时效析出 

分 类 号：TB333[一般工业技术—材料科学与工程]