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@ARTICLE{Bolelli:866332,
author = {Bolelli, Giovanni and Vorkötter, Christoph and Lusvarghi,
Luca and Morelli, Stefania and Testa, Veronica and Vaßen,
Robert},
title = {{P}erformance of wear resistant {MC}r{A}l{Y} coatings with
oxide dispersion strengthening},
journal = {Wear},
volume = {444-445},
issn = {0043-1648},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2019-05488},
pages = {203116},
year = {2020},
abstract = {Aiming to devise suitable materials for sliding wear
protection at high temperature, aluminium oxide-dispersion
strengthened (ODS) CoNiCrAlY coatings were manufactured by
vacuum plasma spraying (VPS). Feedstock materials were
ball-milled powders with 2, 10 and $30 wt\%$ Al2O3
content. The ball-on-disc sliding wear behaviour of the
coatings was tested at 750 °C against an Al2O3
counterpart, and compared to a pure CoNiCrAlY coating
(obtained from a commercial feedstock not subjected to ball
milling) and to an uncoated Ni-base superalloy.Sliding wear
rates decrease from the uncoated superalloy
(≈3 × 10−5 mm3/(N·m)) to the pure CoNiCrAlY
coating (≈2 × 10−5 mm3/(N·m)) and to the ODS ones,
with the notable exception of the $10 wt\%$
Al2O3-containing sample.Analyses of worn samples indicate
that pure CoNiCrAlY is subject to severe adhesive wear,
mitigated by the formation of a thick (>1 μm) “glaze”
layer via compaction and (probable) sintering of
tribo-oxidized debris particles. Addition of Al2O3 particles
to the CoNiCrAlY matrix can either enhance or worsen the
“glaze” stability. Specifically, a coating strengthened
with $30 wt\%$ Al2O3 provides an especially good
mechanical support to the “glaze”. This produces
beneficial effects resulting in a particularly low wear rate
of ≈3 × 10−6 mm3/(N·m).},
cin = {IEK-1},
ddc = {670},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {113 - Methods and Concepts for Material Development
(POF3-113)},
pid = {G:(DE-HGF)POF3-113},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000513001800001},
doi = {10.1016/j.wear.2019.203116},
url = {https://juser.fz-juelich.de/record/866332},
}