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Microstructural characterization of a Pt-aluminide coated IN738LC

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Abstract

In this paper, the microstructural and chemical characterization of the IN738LC superalloy, coated with a Pt-Cr modified aluminide coating, is presented. The effects of aging in air at 850 °C on superalloy and coating microstructures were investigated. The growth of γ′ precipitates in IN738LC follows the Wagner-Lifshits model. The positive effect of Pt in preventing refractory element diffusion into the outer coating is not influenced by the aging. A moderate precipitation of TCP phases has been noted at the coating-superalloy interface.

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  1. Department of Mechanical and Management Innovation (DIMEG), University of Padua, 35131, Padova, Italy

    I. Calliari, M. Dabalà & A. Zambon

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  1. I. Calliari
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  2. M. Dabalà
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  3. A. Zambon
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Calliari, I., Dabalà, M. & Zambon, A. Microstructural characterization of a Pt-aluminide coated IN738LC. J. of Materi Eng and Perform 10, 258–262 (2001). https://doi.org/10.1361/105994901770344962

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  • DOI: https://doi.org/10.1361/105994901770344962

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