C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 35/48 (2006.01) C23C 4/02 (2006.01) C23C 14/08 (2006.01) C23C 30/00 (2006.01)
Patent
CA 2318612
A heat barrier composition, particularly for a superalloy mechanical part protected by a ceramic coating with said composition, and method for creating the ceramic coating. The new low thermal conductivity heat barrier comprises a zirconia base and a dysprosium oxide having the dual function of stabilizing the zirconia and reducing the thermal conductivity thereof. Optionally, the composition also comprises a metal oxide containing a quadrivalent metallic ion selected from the group consisting of hafnium dioxide, cerium dioxide, uranium dioxide, and mixtures thereof.
La nouvelle composition de barrière thermique de faible conductivité thermique comporte une base de zircone et un oxyde de dysprosium pour assurer un double rôle de stabiliser la zircone et d'abaisser la conductivité thermique de la zircone. Optionnellement, la zircone comporte en outre un oxyde métallique contenant un ion métallique quadrivalent choisi parmi le dioxyde de hafnium, de cérium, d'uranium, ou un mélange de ces oxydes.
Alperine Serge Alexandre
Arnault Veronique
Lavigne Odile
Mevrel Remy
Goudreau Gage Dubuc
Snecma
Snecma Moteurs
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