半固态搅拌铸造TiO_(2)/A356复合材料的力学性能研究  

Study on Mechanical Properties of TiO_(2)/A356 Composites Prepared by Semi-Solid Stirring Casting

作　　者：黄世源 袁丽丽 唐鑫[3] 吴聪[1] HUANG Shi-yuan;YUAN Li-li;TANG Xin;WU Cong(Guangxi Vocational and Technical College of Communications,Nanning 530023,Guangxi,China;Nanning University,Nanning 530200,Guangxi,China;College of Material Science and Engineering,Guilin University of Technology,Guilin 541004,Guangxi,China)

机构地区：[1]广西交通职业技术学院,广西南宁530023 [2]南宁学院,广西南宁530200 [3]桂林理工大学材料科学与工程学院,广西桂林541004

出　　处：《铸造》2021年第4期438-443,共6页Foundry

基　　金：2018年度广西壮族自治区中青年教师基础能力提升项目(2018KY1026)。

摘　　要：采用半固态搅拌结合超声处理技术,制备了不同纳米尺寸二氧化钛颗粒增强A356铝基复合材料,并对复合材料进行了力学性能测试及显微结构分析。试验结果表明,纳米TiO_(2)是一种有效的陶瓷颗粒增强体,有利于抑制α-Al树枝晶生长,细化共晶硅,提高A356铝合金的力学性能。在同等质量百分比下,添加1%40 nm二氧化钛颗粒铸造制备的TiO_(2)/A356复合材料力学性能增强效果最佳。The A356 aluminum matrix composites reinforced by different nano-sized titanium dioxide nanoparticles were prepared by semi-solid stirring and ultrasonic treatment.The mechanical properties and microstructure of the composites were tested.The experimental results show that TiO_(2) nanoparticles contribute to inhibit the formation ofα-Al dendrite,refine eutectic silicon,and improve the mechanical properties of A356 aluminum alloy.Under the same mass percentage,the TiO_(2)/A356 composite prepared by adding 1wt.%40 nm titanium dioxide particles shows the best mechanical properties.

关 键 词：A356 铝基复合材料 纳米二氧化钛 超声处理 

分 类 号：TG146.2+1[一般工业技术—材料科学与工程]