C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 14/08 (2006.01) B32B 18/00 (2006.01) C23C 4/10 (2006.01) C23C 28/00 (2006.01) F01D 5/28 (2006.01) F02C 7/24 (2006.01)
Patent
CA 2549091
This invention provides a thermal barrier ceramic coating for application to a metallic article, with the ceramic coating having a formula of NdxZr1-xOywith Z dissolved in , where 0<x<0.5 and 1.75<y<2 and wherein Z is an oxide of a metal selected from the group consisting of Y, Mg, Ca, Hf and mixtures thereof. In one embodiment Nd is added at a level up to 7 mole %. In another embodiment Z is yttrium and is added at a level of at least 6wt%.
Cette invention permet l~élaboration d~un revêtement de protection thermique en céramique destiné aux articles métalliques, et dont la formule est Nd¿x?Zr¿1-x?O¿y ?avec Z passé en solution, où l~on considère que 0<x<0,5 et que 1,75<y<2 et dans laquelle Z est un oxyde de métal sélectionné dans un ensemble comprenant Y, Mg, Ca, Hf ainsi que leurs mélanges. Dans une variante de la formule, Nd est intégré selon un pourcentage moléculaire pouvant aller jusqu~à 7. Dans une autre, Z est constitué d~yttrium et représente au moins 6% de la masse.
Lawton Paul
Liu Yourong
Chromalloy Gas Turbine Corporation
Deeth Williams Wall Llp
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