Cracks on the Surfaces of Silver Tungsten Carbide Contacts

Silver tungsten carbide contacts material, in which the silver having good thermal conductivity and electrical conductivity, good oxidation resistance and good processing performance, etc., and tungsten carbide having the advantages of improving their anti-welding resistance and arc erosion resistance performance and so on.

After galvanic corrosion, the surfaces of silver tungsten carbide contacts will have cracks, its composition is not evenly distributed, you can see the loose structure of their melt layer surface, and compared to the previous experiment, the silver content is significantly reduced, contacts surfaces also did not find holes and gas eruptions pits, what suggesting that silver drip splash does not occur in the high-temperature smelting process, among which is the reason for the cracks that the lack of silver result in the loose structure. Certainly, this does not explain that the higher of the silver content can prevent cracks. Studies have shown that if the silver content is too high, it is more easily lead to large silver shedding phenomenon. Therefore, the silver content should be controlled in a certain proportion, which can reduce drip splashes and prevent cracks.



 

Tungsten Metals Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten.com.cn
 Tel.: 86 592 5129696; Fax: 86 592 5129797
 Email: sales@chinatungsten.com
 Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
 Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
 Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn