Patent ID: 7374818
Filing Date: 2008-05-20
Classification: C04B,C23C

Abstract:
1. An article comprising: a silicon based substrate; an oxygen gettering layer; a layer between the silicon based substrate and the oxygen gettering layer, wherein the layer has an elastic modulus of between 30 and 130 GPa and is selected from the group consisting of alkaline earth alumino silicates, yttrium monosilicate, yttrium disilicate, rare earth mono and disilicates, hafnium silicate, zirconium silicate; oxides of hafnium, zirconium, yttrium, rare earth metals, niobium, titanium, tantalum, silicon, aluminum; silicon nitride; silicon carbide; silicon oxynitrides; silicon oxy carbides; silicon oxycarbonitrides; silicon refractory metal oxides; alumina forming refractory metal alloys; chromia forming refractory metal alloys; and mixtures thereof; and an environmental barrier coating (EBC) on the oxygen gettering layer.