Patent ID: 7538045

Claim:
A process for the deposition of protective coatings to complex shaped silicon (Si) based substrates, comprising steps in an order of: providing a complex shaped Si-containing substrate; depositing an electrically conductive layer upon a surface of the substrate in a non-oxidizing environment by a method selected from the group consisting of chemical vapor deposition, physical vapor deposition and melt coating; depositing at least one barrier layer by electrophoretic deposition (EPD) as a protective coating; and depositing an intermediate insulating layer between the substrate and the electrically conductive layer, wherein the barrier layer is selected from the group consisting of yttrium monosilicate, yttrium disilicate, rare earth silicates, barium-strontium-aluminosilicates, niobium oxide, tantalum oxide, zirconium oxide, hafnium oxide, titanium oxide, mullite and mixtures thereof.