C – Journal of Carbon Research,
Journal Year:
2024,
Volume and Issue:
10(4), P. 106 - 106
Published: Dec. 16, 2024
This
article
compares
the
properties
of
diamond-like
carbon
(DLC)
coating
with
those
ZrN
and
(Zr,Hf)N
coatings
deposited
on
Ti-6Al-4V
titanium
alloy
substrate.
To
improve
substrate
adhesion
during
deposition
DLC
coating,
preliminary
etching
chromium
ions
was
conducted,
ensuring
formation
a
chromium-saturated
diffusion
surface
layer
in
A
Si-DLC
followed
by
pure
then
deposited.
The
hardness
coatings,
their
morphology,
fracture
strength
scratch
test,
tribological
wear
resistance
pin-on-disk
test
contact
Al2O3
steel
indenters
were
investigated.
structure
studied
using
transmission
electron
microscopy,
its
corrosion
an
environment
simulating
blood
plasma
also
In
AISI
52100
indenters,
DLC-coated
sample
demonstrates
much
lower
friction
coefficient
significantly
better
compared
to
nitride-coated
uncoated
samples.
Both
nitride
coatings—(Zr,Hf)N
ZrN—and
slow
down
corrosive
dissolution
base
sample.
currents
(Zr,Hf)N-coated
samples
are
37.01
nA/cm2,
20%
higher
than
ZrN-coated
application
(Zr,Hf)N,
ZrN,
inhibits
(by
30–40%)
increases
polarization
1.5–2.0-fold
0.9%
NaCl
at
40
°C.
Thus,
described
simultaneously
provides
effective
plasma.
can
be
considered
manufacture
medical
products
(in
particular,
implants)
from
alloys,
including
functioning
human
body
subject
mechanical
(e.g.,
knee
joint
endoprostheses).
Journal of Manufacturing and Materials Processing,
Journal Year:
2025,
Volume and Issue:
9(1), P. 13 - 13
Published: Jan. 5, 2025
To
improve
high-temperature
oxidation
resistance
for
Ti6Al4V
alloy,
AlxCoCrCuyFeNi
(x
=
0,
0.3,
0.5,
0.7,
1.0;
y
1.0,
x
+
1.0)
high-entropy
alloy
(HEA)
coatings
were
prepared
on
the
substrate
by
a
laser
cladding
technique.
The
results
show
that
mainly
composed
of
FCC,
BCC,
and
Ti-rich
phases.
Severe
segregation
Cu
element
occurred
in
CoCrCuFeNi
HEA
as
Cu-rich
phase
(FCC2).
phases
decreased
with
decreasing
content
completely
disappeared
until
Al
reached
1.0.
microhardnesses
Cu1.0,
Cu0.7Al0.3,
Cu0.5Al0.5,
Cu0.3Al0.7,
Al1.0
2.01,
2.06,
2.08,
2.09,
2.11
times
substrate,
compared
those
rates
55%,
51%,
47%,
42%,
35%,
respectively.
surface
oxides
five
CuO,
TiO2,
Fe3O4,
Cr2O3,
Al2O3.
increase
promoted
generation
Al2O3
film
Cr2O3
surfaces
coatings,
which
significantly
improved
antioxidant
performance
50
h
at
800
°C.
When
coating
showed
best
performance.
Frontiers in Bioengineering and Biotechnology,
Journal Year:
2024,
Volume and Issue:
12
Published: July 3, 2024
Metal
alloys
like
stainless
steel,
titanium,
and
cobalt-chromium
are
preferable
for
bio-implants
due
to
their
exceptional
strength,
tribological
properties,
biocompatibility.
However,
long-term
implantation
of
metal
can
lead
inflammation,
swelling,
itching
because
ion
leaching.
To
address
this
issue,
polymers
increasingly
being
utilized
in
orthopedic
applications,
replacing
metallic
components
such
as
bone
fixation
plates,
screws,
scaffolds,
well
minimizing
metal-on-metal
contact
total
hip
knee
joint
replacements.
Ceramics,
known
hardness,
thermal
barrier,
wear,
corrosion
resistance,
find
extensive
application
electrochemical,
fuel,
biomedical
industries.
This
review
delves
into
a
variety
biocompatible
materials
engineered
seamlessly
integrate
with
the
body,
reducing
adverse
reactions
toxicity,
or
immune
responses.
Additionally,
examines
potential
various
biomaterials
including
metals,
polymers,
ceramics
implant
applications.
While
remain
indispensable,
show
promise
alternative
options.
surface-modified
offer
hybrid
effect,
combining
strengths
different
constituents.
The
future
lies
advanced
fabrication
techniques
personalized
designs,
facilitating
tailored
solutions
complex
medical
needs.
The
microstructure
stability
of
sublayers
in
high-temperature
environments
is
crucial
determining
oxidation
resistance
the
entire
metal/nitride
multilayer
coating-substrate
system.
In
this
study,
and
Ti/TiN,
Ti/TiAlN,
Cr/TiAlN
coatings
was
comprehensively
compared
under
thermal
cycling
an
air
atmosphere.
tests
demonstrated
that
Ti
layers
both
Ti/TiN
Ti/TiAlN
were
nitrided
due
to
nitrogen
diffusion
interface
reactions.
Thick
oxide
layer
formed
on
coating.
Thermal
stresses,
phase
transformations,
interdiffusion
zones
(IDZ),
differences
stiffness,
droplet
induced
facilitate
vertical
cracks
filled
with
internal
plastic
deformation
substrate
surface,
indicating
unfavorable
resistance.
contrast,
absence
cracking
Cr
nitridation
as
well
dense
scale
surface
infer
outstanding
for
Cr/TiAlN.
This
work
provides
valuable
insights
into
design
nitride
protect
titanium
alloys
operating
conditions.
