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热压烧结-热挤压复合工艺制备SiCp/6061Al基复合材料
英文标题:Hot pressing sintering-hot extrusion compound method for SiCp/6061Al composites
作者:原国森 张小翠 杨通胜 
单位:河南工学院 新乡职业技术学院 
关键词:热压烧结 热挤压 复合工艺 SiCp/6061Al基复合材料 断裂机理 
分类号:TF124.5
出版年,卷(期):页码:2017,42(2):124-127
摘要:
采用热压烧结-热挤压复合工艺制备了SiC体积分数为35%的SiCp/6061Al基复合材料。观察了复合材料的金相组织和断口形貌,检测了复合材料的密度和抗拉强度。分析了热压和热挤压复合工艺对复合材料的影响。结果表明:采用热挤压二次成形后,增强体在基体中的分布均匀化,与挤压方向平行;复合材料的致密度达到98.09%,抗拉强度达到248 MPa;基体组织晶粒细化,并产生大量的位错和亚晶组织;SiCp/6061Al复合材料断裂机理主要由6061Al基体的韧性断裂和增强体SiC颗粒的脆性断裂组成。
The SiC/6061Al composite containing 35% volume fraction of SiC was prepared by hot pressing sintering-hot extrusion compound method. Then, the microstructures and fracture of composite SiCp/6061Al were observed, and its density and tensile strength were examined. Furthermore, the influence of hot pressing sintering-hot extrusion compound method on SiCp/6061Al composite was researched. The results show that after the secondary forming of hot extrusion, reinforcement particles in the substrate are uniform distribution and parallel to the extrusion direction. The density is up to 98.09%, and its tensile strength reaches 248 MPa. The grain size of substrate is increasingly refined, much dislocation and sub-crystal structure are generated. Thus, the fracture mechanism of SiCp/6061Al composites after hot-extrusion is mainly composed of ductile fracture of 6061Al substrate and brittle rupture of SiC particles.
基金项目:
河南省教学技术装备和实践教育研究项目(GZS139)
作者简介:
原国森(1981-),男,硕士,讲师
参考文献:


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