Friction stir welding of new electronic packaging materials SiCp/Al composite with T-joint

Abstract

Using friction stir welding, the electronic container box and lid made from aluminium matrix composites with reinforcement of SiC particle (15 vol% SiCp/Al-MMCs) was welded successfully with T-joint. The temperature distribution of box during the process, mechanical property and microstructure of the joint as well as gas tightness of welded box was investigated. The experimental results indicated that the satisfactory T-joint can be obtained under appropriate friction stir welding parameters. During the welding process, the bottom center, which was used to place the electronic component, reached a quite lower temperature of 100°C. That can ensure safety of components in the box. After the welding process, the microstructure in stir zone was better than in base material due to the refining and homogeneous distribution of the SiC particles. The experimental results showed that the electronic container box after friction stir welding had gas tightness. The He-leakage rate was under 10-8 Pa•m3/s.

Effect of different surface pretreatment method on vacuum brazing joint properties of AlSi50 alloy

“…At present, high-end equipment manufacturing areas need a lot of new materials, which must have excellent strength, ductility, toughness, corrosion resistance and thermal conductivity [1][2][3][4]. Compared with the conventional materials, high-silicon aluminum alloy has excellent performances, such as light weight, high strength, high thermal conductivity, small coefficient of linear expansion, good dimensional stability and so on, which makes this kind of material widely used in the fields of aerospace electronic packaging [5,6].…”