MULTI-LAYERED THERMAL BARRIER COATING Russian patent published in 2014 - IPC C23C14/16 C23C14/34 C23C30/00 F01D5/00 

FIELD: chemistry.

SUBSTANCE: invention relates to a multilayered thermal barrier coating on components of a hot path of energy gas turbine installations of high power. The multi-layered thermal barrier includes a basic metal sublayer, made from a nickel-based alloy, an upper ceramic thermal barrier layer and an additional metal thermal barrier sublayer between the basic sublayer and the ceramic layer. The basic metal sublayer contains 18…25% of cobalt, 14…20% of chrome, 11…14% aluminium and 0.1…0.7 yttrium. The upper ceramic thermal barrier layer is made from a material based on zirconium dioxide ZrO₂, partially stabilised 6…8% by yttrium oxide weight. The additional metal thermal barrier layer is made from a nickel-based alloy, containing 18…25% of cobalt, 14…20% of chrome, 10…13% of aluminium and 0.1…0.7 of yttrium.

EFFECT: protection against an impact of high temperatures, erosion and corrosion by the formation of long-lasting thermal barrier coatings.

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