Formation and performance of niobium silicide diffusion coatings dependence on the halide activators
Surface and Coatings Technology,
Год журнала:
2025,
Номер
unknown, С. 131859 - 131859
Опубликована: Янв. 1, 2025
Язык: Английский
In-situ formation mechanism and long-term isothermal oxidation behaviors at 1400oC and 1500oC of (Nb,Ti,Mo)Si2-(Ti,Nb,Mo)5Si3 biphasic compositionally-complexsss ceramic composite coating on C103 alloy
Corrosion Science,
Год журнала:
2025,
Номер
unknown, С. 112914 - 112914
Опубликована: Апрель 1, 2025
Язык: Английский
Microstructure and Tribological Properties of Hf0.1Nb1.6Mo0.3Ta0.12C0.12 Medium-Entropy Niobium-Based Coating by Laser Metal Deposition
JOM,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 13, 2025
Язык: Английский
Achieving an excellent synergy of strength and ductility in heat-treated laser powder bed fused Niobium-based alloys via ZrO2-induced sub-grains
Materials Science and Engineering A,
Год журнала:
2025,
Номер
unknown, С. 148575 - 148575
Опубликована: Май 1, 2025
Язык: Английский
Plasma-assisted particle deposition manufacturing: Multi-functional integrated superhigh temperature thermal protection coating on niobium alloy
Composites Part B Engineering,
Год журнала:
2024,
Номер
288, С. 111905 - 111905
Опубликована: Окт. 18, 2024
Язык: Английский
Hot corrosion of SiO2/NbSi2 multilayer coating on Nb alloy at 700-1100 °C
Journal of Alloys and Compounds,
Год журнала:
2024,
Номер
unknown, С. 178363 - 178363
Опубликована: Дек. 1, 2024
Язык: Английский
Formation and properties of niobium silicide coatings on Nb-Ta alloy substrate
Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 29, 2024
Niobium
silicide
coatings
have
been
noted
in
the
aeronautical
and
aerospace
industries
due
to
their
high
resistance
oxidation
creep.
Despite
these
desirable
properties,
there
is
a
need
for
further
improvements
make
them
more
applicable
demanding
scenarios.
This
study
investigates
niobium
processed
on
Nb-22Ta
alloy
substrate
by
Double
Pack
Cementation
method,
assess
influence
of
tantalum
coatings.
The
pack
mixture
was
composed
15%
Si,
5%
salt
halide
activator
80%
Al
2
O
3
,
with
NH
4
Cl
F
used
as
activators.
were
at
1000°C
6
h.
Analysis
surfaces
included
correlation
similar
diffusion
pure
Nb
under
conditions.
results
obtained
SEM
EDS
revealed
low
presence
Ta
coatings,
regardless
used.
Coatings
showed
exclusive
formation
NbSi
while
those
exhibited
both
5
Si
.
Nanohardness
analysis
indicated
hardness
levels
(1459
HV),
different
from
which
demonstrate
much
higher
close
surface,
around
2038
HV.
Furthermore,
better
elevated
temperatures,
demonstrated
thermogravimetric
up
1350°C.
behavior
confirms
s
that
are
influenced
elements
can
be
enhanced
processing
conditions
such
mixture.
Язык: Английский
HfC–HfO 2modified high/superhigh temperature thermal protection coating for superior hot corrosion resistance and anti-oxidation performance
Journal of Advanced Ceramics,
Год журнала:
2024,
Номер
14(1), С. 9221014 - 9221014
Опубликована: Дек. 5, 2024
With
the
advances
in
thrust-weight
ratio,
service
temperature
of
gas
turbine
engines
even
exceeds
1500℃,
which
is
urgent
to
develop
high/superhigh
thermal
protection
systems
for
long-term
service.
Niobium
alloys
are
increasingly
viewed
as
a
promising
structural
material
high-temperature
applications
due
their
superior
mechanical
strength,
but
"pest"
catastrophic
oxidation
greatly
restricts
its
further
application.
Herein,
HfC-HfO2
modified
silicide
coating
was
prepared
via
an
innovative
method
halide-activated
pack
cementation
combined
with
liquid-plasma-assisted
particle
deposition
and
sintering
on
niobium
alloys,
endowing
composite
excellent
hot
corrosion
resistance
resistance.
This
multilayer
characterized
by
synergistic
combination
dense
NbSi2
inner
layer
porous
outer
layer,
exhibiting
significant
improvement
performance
compared
single
coating.
The
corroded
gain
only
13.94
mg·cm-2
after
time
200
h
at
900℃,
shows
intact
oxide
scale
surface
1500℃
500
min.
ascribed
formed
robust
Hf-rich
skeleton
provided
deposited
can
accelerate
formation
high
stability
layer/oxide
scale.
Besides,
multiple
stress
release
mechanisms
temperatures
also
provide
huge
contributions
All
these
merits
render
competitive
development
Язык: Английский