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Abstract

A growing method of layers for protecting metal interconnects of solid oxide fuel cells includes the steps of: processing a pre-heating or a pre-oxidation and pre-heating procedure upon a metal interconnect, providing several granulated powder groups with individual particle size distributions, selecting one of the granulated powder groups, sending granulated powders of the selected powder group into a high speed high temperature plasma flame, melting the selected granulated powders by the high speed high temperature plasma flame, impacting the metal interconnect by the melted powders with high speeds, and forming a protective layer and a middle layer on the metal interconnect, in which the middle layer is sandwiched between the protective layer and the metal interconnect. The combination of the protective layer, the middle layer and the spinel layer provides a way to reduce the surface ohmic resistance of the metal interconnect and the extent of Cr induced cathode poisoning

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First Claim