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@ARTICLE{Mauer:889234,
author = {Mauer, Georg and Rauwald, Karl-Heinz and Sohn, Yoo Jung and
Weirich, Thomas E.},
title = {{C}old {G}as {S}praying of {N}ickel-{T}itanium {C}oatings
for {P}rotection {A}gainst {C}avitation},
journal = {Journal of thermal spray technology},
volume = {30},
issn = {1544-1016},
address = {Boston, Mass.},
publisher = {Springer},
reportid = {FZJ-2021-00139},
pages = {131-144},
year = {2021},
abstract = {Cavitation erosion is a sever wear mechanism that takes
place in hydrodynamic systems. Examples are turbine vanes of
hydropower plants or components of valves and pumps in
hydraulic systems. Nickel-titanium shape memory alloys
(NiTi) are attractive materials for cavitation-resistant
coatings because of their pronounced intrinsic damping
mitigating cavitation-induced erosion. In this work, NiTi
coatings were produced by cold gas spraying. The phase
transformation behaviors of the powder feedstock and the
as-sprayed coatings were investigated. Regarding the
obtained transformation temperatures, the measured substrate
temperatures during spraying rule out that either the shape
memory effect or the pseudoelasticity of NiTi could affect
the deposition efficiency under the applied conditions of
cold gas spraying. Another potential effect is
stress-induced amorphization which could occur at the
particle–substrate interfaces and impair particle bonding
by stress relaxation. Moreover, also oxide formation can be
significant. Thus, the presence of amorphous phases and
oxides in the near-surface zone of particles bounced off
after impact was investigated. Oxidation could be confirmed,
but no indication of amorphous phase was found. Besides,
also the evolution of local microstrains implies that the
substrate temperatures affect the deposition efficiency.
These temperatures were significantly influenced by the
spray gun travel speed.},
cin = {IEK-1},
ddc = {670},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {124 - Hochtemperaturtechnologien (POF4-124)},
pid = {G:(DE-HGF)POF4-124},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000601482000001},
doi = {10.1007/s11666-020-01139-x},
url = {https://juser.fz-juelich.de/record/889234},
}