Journal Article

FZJ-2020-01742

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Improved Adhesion of Different Environmental Barrier Coatings on Al$_{2}$O$_{3}$/Al$_{2}$O$_{3}$ -Ceramic Matrix Composites

Gatzen, C. (Corresponding author)FZJ* ; Mack, D. E.FZJ* ; Guillon, O.FZJ* ; Vaßen, R.FZJ*

2020
Deutsche Gesellschaft für Materialkunde Frankfurt, M.

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Please use a persistent id in citations: http://hdl.handle.net/2128/25251  doi:10.1002/adem.202000087

Abstract: In high‐temperature combustion atmospheres, well‐adhering environmental barrier coatings (EBCs) are required to protect the underlying ceramic matrix composites (CMCs) from corrosion. Herein the adhesion mechanisms of three different coatings produced by atmospheric plasma spraying (APS) on an Al2O3/Al2O3‐CMC are investigated. In particular, the influence of surface structuring by laser ablation prior to coating production is investigated. Y2O3, yttria‐stabilized zirconia (YSZ), and Gd2Zr2O7 are chosen as potential EBCs. The coating adhesion on CMC‐substrates with and without surface structuring is analyzed by furnace cycling, pull‐adhesion tests, and burner‐rig tests with gradient. Special interest is paid to the interactions at the coating–substrate interface before and after heat treatment and their effect on the coating adhesion and lifetime. Two different adhesion mechanisms are found: adhesion promoted by chemical reaction and adhesion promoted by mechanical interlocking.

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Contributing Institute(s):

1. Werkstoffstruktur und -eigenschaften (IEK-2)
2. Werkstoffsynthese und Herstellungsverfahren (IEK-1)

Research Program(s):

1. 113 - Methods and Concepts for Material Development (POF3-113) (POF3-113)

Appears in the scientific report 2020

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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