MULTI-LAYERED COATING WITH COLUMNAR MICROSTRUCTURE AND BRANCHED COLUMNAR MICROSTRUCTURE
Abstract:
An article includes a substrate and a multi-layered ceramic barrier coating on a substrate. The coating includes, from the substrate outward, a first layer of a low-dopant ceramic material and a second layer high-dopant ceramic material. The first layer has a columnar microstructure and the second layer has a branched columnar microstructure.
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