Ansaldo Energia S.p.a.

Finmeccanica S.p.a. Azienda Ansaldo

Sergio Corcoruto

Tatiana Falcinelli

Fabrizio Casadei

Andrea Campora

Giuseppe Carlo Gualco

Alloy composition for the manufacture of protective coatings, comprising cobalt, nickel, chromium, aluminum, yttrium and iridium in amounts so as to obtain the phases &#x3b1;, &#x3b2; and &#x3c3;, in particular for coating a super-alloy article. Preferably, such super-alloy article is a turbine component.

Alloy composition for the manufacture of protective coatings, its use, process for its application and super-alloy articles coated with the same composition

Alloy composition for the manufacture of protective coatings, comprising cobalt, nickel, chromium, aluminium, yttrium and iridium in amounts so as to obtain the phases &#x3b1;, &#x3b2; and &#x3c3;, in particular for coating a super-alloy article. Preferably, such super-alloy article is a turbine component.

Two different powders, one ceramic and the other of polymer particles, are fed separately into a jet of plasma of a conventional torch of a plasma spraying device by means of separate supply devices having respective powder injectors. The injection parameters of the two powders are established independently to achieve effective fusion of the ceramic particles and prevent complete combustion of the polymer particles. More specifically, the ceramic powder is injected along the axis of the jet of plasma, while the polymer powder is injected into a peripheral portion of the jet, at a predetermined distance from the jet axis, so that some of the polymer particles are incorporated in the ceramic coating deposited on a component for coating; and the polymer is subsequently removed by medium-temperature heat treatment to leave a porous ceramic coating with excellent thermal insulation properties.

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Turin, Italy

Sergio Corcoruto