Patent ID: 7160635
Filing Date: 2007-01-09
Classification: C23C,Y02T,Y10T

Abstract:
1. A coating on a metal substrate, the coating contacting and overlying at least a portion of the substrate surface; the coating comprising a nitride layer contacting the substrate surface and having a composition, in atomic percent, of from 5 to 30% titanium, of from 10 to 40% aluminium, of from 1 to 40% chromium, of from 0 to 3% yttrium, of from 40 to 60% nitrogen, plus incidental impurities, wherein additional oxi-nitride layer is contacting and overlying the surface of the nitride layer; the oxi-nitride layer comprising a superlattice type interlayer with TiAlYN and CrN layers and a glassy overcoat region.