Patent ID: 8247085
Filing Date: 2012-08-21
Classification: B32B,C22C,C23C,F01D,F05D,Y02T,Y10T

Abstract:
1. A coating capable of promoting the oxidation resistance of a surface of a niobium-based substrate, wherein the coating is formed from: a composition that contains, in atomic percent, about 31 to about 99% chromium, about 1 to about 37% silicon, and about 0 to about 40% niobium+titanium+hafnium+iron where titanium, hafnium and iron are optional, and wherein the coating comprises at least about 72 volume percent of silicon-modified Cr 2 Nb Laves phase, up to about 28 volume percent of chromium solid solution, up to about 28 volume percent of CrNbSi intermetallic phase, and up to about 25 volume percent of M 3 Si intermetallic phase, wherein M is selected from at least one of niobium, titanium, and chromium.