ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(47), С. 65565 - 65580
Опубликована: Ноя. 15, 2024
In
this
study,
CrAlSiN
coatings
with
nitrogen
contents
ranging
from
approximately
42
to
54
at.
%
were
deposited
and
subsequently
exposed
temperatures
of
700
or
900
°C
for
2
h
in
ambient
air
investigate
the
impact
content
on
microstructure
evolution
high-temperature
oxidation
resistance.
It
was
found
that
coating
42–45
exhibited
an
amorphous/nanocrystalline
hybrid
structure,
comprising
pure
metallic
Cr
(Al,Cr)N
phases
within
matrix,
as
determined
by
TEM,
XRD,
XPS
analysis.
contrast,
exceeded
52
%,
transformed
a
dominantly
columnar
structure
featuring
solely
Cr(Al)N
phase.
The
∼52
retained
amorphous
fraction
around
20%
but
demonstrated
superior
resistance
lowest
parabolic
rate
constant
1.1
×
10–14
cm2/s
at
compared
other
coatings.
This
enhanced
performance
primarily
attributed
high
stability
phase
formation
fine-columnar/amorphous
devoid
Cr,
resulting
significantly
thin
(∼60
nm)
yet
dense
Al2O3-rich
monolayer
atop
surface
during
oxidation.
Conversely,
substoichiometric
N
≤45
would
form
thick
Cr2O3
outer
layer
over
underlying
Al2O3
layer.
Additionally,
elemental
segregation
Si,
Al
observed
all
after
exposure
h,
which
induced
spinodal
decomposition
ternary
nitride
phases.
Coatings,
Год журнала:
2025,
Номер
15(2), С. 144 - 144
Опубликована: Янв. 27, 2025
The
low
corrosion
resistance
of
aluminum
alloy
materials
in
chloride
environments
limits
their
application
light
metal
structural
components.
In
this
study,
434
stainless
steel
(SS)
powders
with
different
numbers
scan
layers
were
deposited
on
T6061
using
high-velocity
oxygen
fuel
(HVOF).
Tafel
curve,
electrochemical
impedance
spectroscopy
(EIS),
salt
spray,
and
galvanic
tests
employed
to
investigate
the
comprehensive
behavior
SS
coatings
a
chlorine
environment.
results
showed
that
porosity
decreased
as
scanning
layer
increased.
A
lower
slowed
penetration
corrosive
solution
led
an
enhanced
long-term
attacks
immersion
spray
corrosion.
On
basis,
preferred
SS4
sample
iron
screw
composition
system
was
subjected
corrosion,
its
electric
current
intensity
(5.11
×
10−5
A)
two
orders
magnitude
than
(9.14
10−3
A),
well
presenting
better
anti-corrosion
behavior.
Materials,
Год журнала:
2025,
Номер
18(9), С. 2107 - 2107
Опубликована: Май 4, 2025
In
this
study,
as-cast
ductile
iron
was
austempered
to
produce
(ADI).
A
CrAlSiN
film
then
deposited
on
the
surface
of
ADI
specimens
using
cathodic
arc
deposition
(CAD)
method.
The
gas
flow
ratio
Ar/N2
varied
(2,
2.5,
and
3)
under
different
processing
parameters,
designated
as
S1,
S2,
S3,
respectively.
composition,
structure,
hardness,
adhesion,
wear
resistance
coated
were
analyzed
evaluate
effect
hardness
abrasion
resistance.
experimental
results
indicated
that
CrN/Al(Si)N
nano-multilayered
films
successfully
synthesized
oppositely
positioned
dual
targets
(Cr
AlSi)
reacting
with
N2
during
CAD
process.
coatings
significantly
enhanced
ADI.
comparison
three
coating
conditions
varying
ratios
revealed
decreased
(i.e.,
increased),
increased
while
rate
decreased.
Among
tested
conditions,
S1
exhibited
highest
(1479
HV0.1)
lowest
(1.6
×
10−⁶
g/m).
Materials,
Год журнала:
2024,
Номер
17(12), С. 2989 - 2989
Опубликована: Июнь 18, 2024
TiZrTaAg
alloy
is
a
remarkable
material
with
exceptional
properties,
making
it
unique
choice
among
various
industrial
applications.
In
the
present
study,
two
types
of
bioactive
coatings
using
MAPLE
were
obtained
on
substrate.
The
base
coating
consisted
in
mixture
chitosan
and
bioglass
which
zinc
oxide
graphene
added.
samples
characterized
in-depth
through
varied
methods
to
provide
more
complete
picture
coating.
analysis
included
Fourier
transform
infrared
spectroscopy
(FTIR),
scanning
electron
microscopy
(SEM),
ellipsometry,
micro-Raman.
Vickers
hardness
test
was
used
determine
films
penetration
depth.
Film
adhesion
forces
determined
atomic
force
(AFM).
corrosion
rate
highlighted
by
polarization
curves
electrochemical
impedance
(EIS).
performed
tests
revealed
that
composite
improve
properties
alloy,
them
feasible
for
future
use
as
scaffold
materials
or
implantology.
