TY  - JOUR
AU  - Gatzen, Caren
AU  - Mack, Daniel Emil
AU  - Guillon, Olivier
AU  - Vaßen, Robert
TI  - Improved Adhesion of Different Environmental Barrier Coatings on Al$_{2}$O$_{3}$/Al$_{2}$O$_{3}$ -Ceramic Matrix Composites
JO  - Advanced engineering materials
VL  - 22
IS  - 6
SN  - 1438-1656
CY  - Frankfurt, M.
PB  - Deutsche Gesellschaft für Materialkunde
M1  - FZJ-2020-01742
SP  - 2000087 -
PY  - 2020
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000525899300001
DO  - DOI:10.1002/adem.202000087
UR  - https://juser.fz-juelich.de/record/874977
ER  -