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RE-doped thermal-barrier has greater phase stability.(SURFACE ENGINEERING)

Multicomponent, rare-earth-doped, perovskite-type thermal-barrier coating materials have been developed at NASA Glenn Research Center, Cleveland, Ohio. The coatings are designed to provide lower thermal conductivity, greater phase stability, and greater high-temperature capability than possible with yttria-partially stabilized zirconia

Thermal-barrier coatings are thin ceramic layers that insulate air-cooled metallic components of heat engines from hot gases. These layers are generally fabricated by plasma spraying or physical vapor deposition.

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