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@ARTICLE{Zhang:856715,
author = {Zhang, J. and Garcia-Fresnillo, L. and Jalowicka, A. and
Pillai, R. and Naumenko, D. and Quadakkers, W. J.},
title = {{P}hase {T}ransformations in {C}o-{N}i-{C}r-{W} {A}lloys
{D}uring {H}igh {T}emperature {E}xposure to {S}team
{E}nvironment},
journal = {Journal of phase equilibria and diffusion},
volume = {39},
number = {4},
issn = {1863-7345},
address = {Boston, Mass.},
publisher = {Springer},
reportid = {FZJ-2018-06066},
pages = {387 - 400},
year = {2018},
abstract = {Three model alloys, Co-10Ni-20Cr-15W, Co-30Ni-20Cr-15W and
Ni-20Cr-15W (all in $wt.\%)$ were investigated in
$Ar-50\%H2O$ at 700 and 750 °C for up to 3000 h reaction.
The results showed the formation of thin chromia scales on
the sample surfaces in all cases. For the Co-base alloys,
accompanied by the Cr2O3 formation, a chromium depletion
zone was detected underneath the oxide scale along with Co3W
with some amount of dissolved Cr and Ni. This kind of Co3W
was enriched along the oxide/alloy interface. The formation
of this intermetallic phase was considered to follow
nucleation and subsequent growth based on morphology and
composition analyses. Increasing nickel content reduced the
amount of Co3W formation. For the nickel-base alloy
Ni-20Cr-15W, no intermetallic phase was detected. The
formation of the Co3W intermetallic was discussed based on
phase transformation induced by chromium depletion. The
effect of nickel on this phenomenon was also discussed
according to thermodynamic phase equilibrium analysis.},
cin = {IEK-2},
ddc = {530},
cid = {I:(DE-Juel1)IEK-2-20101013},
pnm = {111 - Efficient and Flexible Power Plants (POF3-111)},
pid = {G:(DE-HGF)POF3-111},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000441127400004},
doi = {10.1007/s11669-018-0647-y},
url = {https://juser.fz-juelich.de/record/856715},
}