What are the difficulties in processing tungsten carbide spraying

       

The difficulty of supersonic spraying and
processing tungsten carbide is that the structure of supersonic spraying
tungsten carbide coating is often porous. Unlike normal high-speed supersonic
spraying tungsten carbide with porosity less than 2%, the coating properties
are expected between 5 ~ 30% ~ 461% and the porosity of supersonic spraying
coating may exceed I5%. The porosity of 131 depends on the melting state of the
spraying, while the electroluminescent particles depends on the ability of the
impact to cause the binding structure. 171 When evaluating dielectric
breakdown, the porosity plays a major role in the voltage amount occupied by
the insulating layer. If the coating is exposed to wet conditions, moisture
accumulates in structural gaps, causing a breakdown voltage reduction. IIS is
prevented during supersonic tungsten carbide processing and then sealed. The
second consideration is the unchangeable fact that the air is contained in the
gap, and that the breakdown voltage of the air is well below the breakdown
voltage of the insulating substrate.

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