SiC纳米颗粒表面处理方式对增强铝基复合材料组织和性能的影响  

Effect of surface treatment of SiC particles on microstructure and properties of Aluminum matrix composites reinforced by nanoparticles

作　　者：姚婷婷 何涛 王京 霍元明 高建烨 Yao Tingting;He Tao;Wang Jing;Huo Yuanming;Gao Jianye(College of Mechanical and Automotive Engineering,Shanghai University of Engineering and Technology,Shanghai 201600,China)

机构地区：[1]上海工程技术大学机械与汽车工程学院,上海201600

出　　处：《现代制造工程》2020年第12期1-5,63,共6页Modern Manufacturing Engineering

基　　金：国家自然科学基金资助项目(51805314);上海市科委重点攻关资助项目(16030501200);国家重点研发项目(2018YFB1307900)。

摘　　要：微纳颗粒在铝合金基体均匀分布有助于提高材料的力学性能。为获得轻质高强铝合金,研究以ZL106铝合金为基体材料,SiC纳米颗粒(简称SiC颗粒)为增强体,采用真空吸铸工艺制备SiC颗粒增强铝基复合材料试件,研究不同表面强化处理方式(镀铜、预氧化)对复合材料微观组织与力学性能的影响。结果表明:SiC颗粒的预氧化和镀铜两种表面强化处理方式都能促进SiC颗粒表面发生钝化,提升铝基复合材料综合性能;表面强化处理后SiC颗粒均匀分布在铝合金基体中,与基体材料形成良好的结合界面。预氧化效果比表面镀铜效果好,具体表现为:SiC颗粒预氧化处理后制备的SiCp/ZL106复合材料力学性能高于SiC颗粒表面镀铜处理后制备的复合材料,前者硬度和抗拉强度值达到最高,分别为94.7HV和297.6 MPa,较基体分别提高了51.5%和38.3%,断裂伸长率为58.9%,与基体相比增加了62.3%。The uniform distribution of micro-nano particles in the aluminum alloy is helpful to improve the mechanical properties of the material.For light weight,high strength aluminum alloy,ZL106 aluminum alloy was studied as substrate material,using nanometer SiC particles to enhance body,using vacuum suction casting process preparation of SiC nanometer particle reinforced Aluminum matrix composites reinforced specimen,different surface strengthening treatment(copper plating,oxidation)impact on the microstructure and mechanical properties of composite materials.The results show that the pre-oxidation and copper plating of SiC particles can promote the passivation of SiC particle surface and improve the comprehensive properties of Aluminum matrix composites.After surface strengthening treatment,SiC particles are uniformly distributed in the aluminum alloy matrix,forming a good interface with the matrix material.Oxidation effect is better than the effect of surface copper plating,embodied in:SiC particles preoxidation process after the preparation of SiCp/ZL106 compound material mechanics performance is higher than the surface of SiC particles copper plating process after the preparation of composite materials,which reached the highest hardness and tensile strength values of 94.7HV and 297.6 MPa,respectively increased by 51.5%and 38.3%compared with matrix,elongation at break value of 58.9%,increased by 62.3%compared with the matrix.

关 键 词：SiC纳米颗粒 铝基复合材料 真空吸铸 微观组织 力学性能 

分 类 号：TB333[一般工业技术—材料科学与工程]