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METHOD FOR COATING A SUBSTRATE TO PROVIDE A TITANIUM OR ZIRCONIUM NITRIDE OR CARBIDE DEPOSIT HAVING A HARDNESS GRADIENT WHICH INCREASES OUTWARDLY FROM THE SUBSTRATE
METHOD FOR COATING A SUBSTRATE TO PROVIDE A TITANIUM OR ZIRCONIUM NITRIDE OR CARBIDE DEPOSIT HAVING A HARDNESS GRADIENT WHICH INCREASES OUTWARDLY FROM THE SUBSTRATE