TY  - JOUR
AU  - Zhou, Dapeng
AU  - Malzbender, Jürgen
AU  - Sohn, Yoo Jung
AU  - Guillon, Olivier
AU  - Vaßen, Robert
TI  - Sintering Behavior of Columnar Thermal Barrier Coatings Deposited by Axial Suspension Plasma Spraying (SPS)
JO  - Journal of the European Ceramic Society
VL  - 39
IS  - 2-3
SN  - 0955-2219
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - FZJ-2018-06817
SP  - 482 - 490
PY  - 2019
AB  - During the last decade, Suspension Plasma Spraying (SPS) attracted a lot of interest as an alternative process to produce columnar Thermal Barrier Coatings (TBCs). In this study, columnar TBCs were deposited with SPS. After spraying, samples were isothermally annealed at 1373 K for 1 h, 3 h, 10 h and 50 h, respectively. Microstructures and mechanical properties of the ceramic coatings were investigated as a function of annealing time. Annealing resulted in healing of micro-cracks, coarsening of pores, growth of domain size, companied with a decrease of porosity within columns. The change of coating microstructure led to change of mechanical properties. In addition, residual stress in SPS coatings was also investigated. Furthermore, as-sprayed coatings and pre-annealed coatings were subjected to burner rig tests. Short time pre-annealing allowed to enhance thermal cycling lifetime of such SPS coatings. The thermal cycling results were related to microstructure modifications of coatings.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000450379400043
DO  - DOI:10.1016/j.jeurceramsoc.2018.09.020
UR  - https://juser.fz-juelich.de/record/857854
ER  -