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@ARTICLE{Kumar:893890,
author = {Kumar, Nitish and Gupta, Mohit and Mack, Daniel E. and
Mauer, Georg and Vaßen, Robert},
title = {{C}olumnar {T}hermal {B}arrier {C}oatings {P}roduced by
{D}ifferent {T}hermal {S}pray {P}rocesses},
journal = {Journal of thermal spray technology},
volume = {30},
issn = {1544-1016},
address = {Boston, Mass.},
publisher = {Springer},
reportid = {FZJ-2021-02902},
pages = {1437-1452},
year = {2021},
abstract = {Suspension plasma spraying (SPS) and plasma spray-physical
vapor deposition (PS-PVD) are the only thermal spray
technologies shown to be capable of producing TBCs with
columnar microstructures similar to the electron
beam-physical vapor deposition (EB-PVD) process but at
higher deposition rates and relatively lower costs. The
objective of this study was to achieve fundamental
understanding of the effect of different columnar
microstructures produced by these two thermal spray
processes on their insulation and lifetime performance and
propose an optimized columnar microstructure.
Characterization of TBCs in terms of microstructure, thermal
conductivity, thermal cyclic fatigue lifetime and burner rig
lifetime was performed. The results were compared with TBCs
produced by the standard thermal spray technique,
atmospheric plasma spraying (APS). Bondcoats deposited by
the emerging high-velocity air fuel (HVAF) spraying were
compared to the standard vacuum plasma-sprayed (VPS)
bondcoats to investigate the influence of the bondcoat
deposition process as well as topcoat–bondcoat interface
topography. The results showed that the dense
PS-PVD-processed TBC had the highest lifetime, although at
an expense of the highest thermal conductivity. The reason
for this behavior was attributed to the dense intracolumnar
structure, wide intercolumnar gaps and high column density,
thus improving the strain tolerance and fracture toughness.},
cin = {IEK-1},
ddc = {670},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {1241 - Gas turbines (POF4-124)},
pid = {G:(DE-HGF)POF4-1241},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000670181200002},
doi = {10.1007/s11666-021-01228-5},
url = {https://juser.fz-juelich.de/record/893890},
}