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@ARTICLE{Wolf:894261,
author = {Wolf, Markus and Mack, Daniel Emil and Mauer, Georg and
Guillon, Olivier and Vaßen, Robert},
title = {{C}rystalline ytterbium disilicate environmental barrier
coatings made by high velocity oxygen fuel spraying},
journal = {International journal of applied ceramic technology},
volume = {19},
number = {1},
issn = {1744-7402},
address = {Oxford [u.a.]},
publisher = {Wiley-Blackwell},
reportid = {FZJ-2021-03136},
pages = {210-220},
year = {2022},
abstract = {Dense environmental barrier coatings (EBCs) are an
essential prerequisite to exploit the advantages offered by
SiC-based fiber reinforced ceramic matrix composites (CMCs)
to increase efficiency in gas turbines. Today's state-of-the
art materials for application as EBCs are rare-earth (RE)
silicates which, however, form amorphous phases upon rapid
quenching from the melt. This makes their processing by
thermal spray a challenge. Recently, high velocity oxygen
fuel (HVOF) spraying was proposed as potential solution
since the melting degree of the feedstock can be controlled
effectively. This work studies the deposition of ytterbium
disilicate (YbDS) at short stand-off distances and variant
total feed rates and oxy-fuel ratios of the working gas. It
was found that the overall degree of crystallinity could be
kept at high level above $90\%.$ The kinetic energy
transferred by impinging particles was found to be an
effective parameter to control the densification of the
coatings. Porosities well below $10\%$ were achieved while
fully dense coatings were impeded due to the progressive
accumulation of stresses in the coatings.},
cin = {IEK-1 / JARA-ENERGY},
ddc = {670},
cid = {I:(DE-Juel1)IEK-1-20101013 / $I:(DE-82)080011_20140620$},
pnm = {1241 - Gas turbines (POF4-124)},
pid = {G:(DE-HGF)POF4-1241},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000677874500001},
doi = {10.1111/ijac.13829},
url = {https://juser.fz-juelich.de/record/894261},
}