Papers by Keyword: Gold Alloy

Abstract: For the reason of outstanding performance and unique character, gold alloys coating materials produced by Magnetron sputtering were used widely and widely. As source material for coating, the quality of gold alloys target has great effects on sputtering technological parameters and performances of coatings. This paper mainly describes the production,application of gold alloys sputtering target as well as the present status and developing trends in the future

Abstract: Conducting ring is an electric transmission device to achieve current, video, data signal and power transmission between two relatively slewing mechanism, so it has been widely used in all kinds of precision turntable and inertial navigation equipment. The slip ring and brush wire of conducting ring are connected to other equipment by copper wire or copper transfer metal plates. Currently, Eutectic 63Sn-37Pb solder and electric iron manual welding are often used. But for gold alloy, when SnPb solder is used, gold element will dissolve in solder because Au dissolves in Sn easily, and brittleness intermetallic was produced at the interface during cooling, which embrittled the joint. This paper analyzed the solderability of gold alloy and copper, summed up the research status of soldering technology of gold alloy and copper in China and abroad. It pointed out that it is necessary and urgent to develop soldering technology of gold alloy with copper.

Abstract: We address the question of the evolution of a nanostructured system in a metastable state to equilibrium. To this purpose, we use the case study of the transition of an Au_corePd_shell nanoalloy cluster containing up to about 600 atoms toward the equilibrium Au segregated configuration. We start from a molecular dynamics approach with an embedded atom potential. The way the transition develops at low temperatures is found to be very sensitive to the cluster morphology and the way energy is exchanged with the environment. The transition of icosahedral inverse core-shell Au-Pd clusters is predicted to nucleate locally at the surface contrary to clusters with other morphologies, and starting at lower temperatures compared to them.