Patent ID: 9695944
Date: 2017-07-04
CPC Classifications: C23C,F16J

Claim:
1. A mechanical seal ring comprising: a seal ring exposed to a process fluid, said seal ring having exposed ring surfaces which are defined on an exterior of said seal ring so as to be exposed to said process fluid and said exposed ring surfaces including a seal face; said seal ring comprising a silicon carbide substrate and a coating layer applied to said substrate so as to define said exposed ring surfaces, said coating layer consisting essentially of tantalum and being electrical corrosion resistant, said seal ring including a transformation layer interfacing inwardly with said substrate and outwardly with said coating layer, said transformation layer consisting essentially of tantalum carbide; and said seal ring formed by using chemical vapor deposition to apply said tantalum of said coating layer to said substrate of said seal ring to form said coating layer, and performing said chemical vapor deposition at an elevated temperature adequate to effect a reaction between said silicon carbide of said substrate and said tantalum being applied to form said tantalum carbide of said transformation layer.