Influence of Hot Gas Atmospheres on Creep Rupture Behavior and Structure of Coated Nickel Base Alloys.

Translated title of the contribution: Influence of Hot Gas Atmospheres on Creep Rupture Behavior and Structure of Coated Nickel Base Alloys.

Kh G. Schmitt-Thomas, G. Johner, H. Meisel

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Aluminum and chromium coatings on nickel base super alloys show precipitations of a brittle phase after exposure to hot combustion gases. The precipitations are localized mainly in the transient area between coating and base material. Microanalytical investigations yield a close connection between the failure of the coating and the formation of needle shaped precipitations - mainly Cr-carbides - in the interface area of coating and base material. Auger analytical investigations and chemical analyses reveal distinct concentrations of nitrogen in the needle shaped area. The investigations revealed that the failure of the coating is mainly caused by the high content of nitrogen in the hot gases.

Translated title of the contributionInfluence of Hot Gas Atmospheres on Creep Rupture Behavior and Structure of Coated Nickel Base Alloys.
Original languageEnglish
Pages (from-to)255-264
Number of pages10
JournalMaterials and Corrosion
Volume32
Issue number6
StatePublished - 1981

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