Coating 17
Coating 17 : Processing: Standards, or more precisely procedures, for processing are generally developed by coating producers and users. However, the reliance of the military on coatings to achieve desired performance objectives has fostered the issue of specifications for both plasma spray and detonation gun deposition processes. ASTM standards developed for the minerals-handling and powder metallurgy industries have been adopted for use where applicable by the plasma spray industry for the analysis of powders. Although company specifications for processes (e. g. , EB-PVD or sputter deposition) are used, they have not been adopted as publicly available standards. Furthermore, suitable reference materials are not available for the calibration of analytical instruments necessary for process control (Dapkunas, 1993)
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