Electrical Engineering Alloy 

Abstract: Silver-tin oxide (AgSnO 2) were fabricated both in conventional powder metallurgy (PM) and reactive synthesis (RS) method. The local melt on AgSnO 2 sintered body surface was carried out by CO 2 Laser to simulate the current arc, and the erosion resistance analysis was done to bulk AgSnO 2. The conductivity and X-ray diffraction analysis were done to bulk AgSnO 2, and the microstructure of bulk AgSnO 2 and cold drawn wire were determined through scanning electron microscope (SEM) and transmission electron microscope (TEM). The results shown that SnO 2 particles with finer size, fresh interface can be formed in silver matrix, and then the AgSnO 2 electrical contact materials can be fabricated by reactive synthesis. The tin oxide particles in micrometer dimension were assembled from nanometer particles in RS process. Compared with conventional PM process, the AgSnO 2 electrical contact materials fabricated by RS process have a higher conductivity. For the reason that the combination state of silver and tin oxide had been changed, the working properties, conductivity and erosion resistance were enhanced in AgSnO 2 electrical contact materials fabricated by RS process.

Abstract: The coarseness testing appearance can show digitally the surface condition of electric contact. Coarseness effects on contact resistance of electric contacts, especially, light_duty ones were analyzed.

Abstract: The electric arc erosion principle of Cu-W electrical contact materials was studied As shown that the electric abrasion of W-Cu contact materials have three stages, which is old-refine and stability and inactivation stage, with change of arc on-off times The electric-lifetime of W-Cu contact materials depends on the time of stability stage And also, the electric arc erosion of contact materials is engendered by heat effect of arc and other discharge phenomenon during the open and close of electric contact materials The specific heat capacity, density, melting point and electric conductivity of contact materials are the key effective factors on electric-lifetime

Abstract: Manufacturing new metals to replace Beryllium-Copper alloy ("Be-Cu" for short) is a popular study in the Material Field in recent years. But so far, the manufactured products are basically alloying metals and the effects are unsatisfied. By introducing advanced equipment from abroad, Foshan Electrical Precision Alloy Co. Ltd has manufactured layer-clad metals with high electric conductivity and high elasticity which can replace Be-Cu alloy, and this new metal is now being widespread used in many fields such as electrical appliance and electronic component, etc. and getting a satisfied economic and social effect.