Defect Types of Tungsten Contacts- II

The other defect types of tungsten contacts can be shown as follows:

6. The squeezing crack
This is because tungsten contacts have been existed or gathered porous holes before extrusion, which resulting in the formation of cracks under pressure during the extrusion process.

7. The silver belt or strap
In silver tungsten contacts or copper tungsten contacts, because during the pre-sintering process, there are cracks in porous skeleton, and silver or copper will penetrate along the cracks at the time of infiltration sintering, thereby forming a silver belt or strap.

8. The purity of tungsten contacts material
9. The particle size and morphology of tungsten powder

10. The production process for each procedure, etc.
Therefore, in the analysis of the defect types of tungsten contacts material, it should be combined with a variety of factors to determine the causes and resolve them, in order to obtain a good quality of contacts.



 

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