Thermally barrier

Thermally barrier

Thermally barrier coatings are designed to slow heat transfer and insulate the substrate. The coating systems used today usually consist of two components: a metallic bond coat (usually an MCrAlY) that also acts as an oxidation resistant layer and a top coat of ceramic (usually a yttrium stabilized zirconium oxide). The coating system has a low rate of thermal conductivity and a high thermal expansion coefficient. These coating systems extend the service life of components or allow components to operate at higher temperatures, increasing thermal efficiency.

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