Study on the Effects of GO on the Microstructure and Wear Resistance of CuCrZr Plasma Cladding Coatings
Coatings,
Год журнала:
2024,
Номер
14(6), С. 763 - 763
Опубликована: Июнь 16, 2024
This
study
investigates
the
enhancement
of
wear
resistance
in
CuCrZr
rails
through
plasma
cladding
CuCrZr-GO
coatings
with
a
varying
graphene
oxide
(GO)
content.
The
microstructure,
phase
composition,
and
mechanical
properties
containing
0%,
0.2%,
0.4%,
0.6%,
0.8%
GO
were
examined
using
scanning
electron
microscopy
(SEM),
X-ray
diffraction
(XRD),
ESD
surface
scanning,
friction
tests,
hardness
analysis.
findings
indicated
that
increasing
content
from
0%
to
0.6%
results
transition
coating
microstructure
columnar
equiaxed
crystals,
leading
an
improved
density.
However,
at
GO,
numerous
porosity
defects
observed.
exhibited
superior
performance,
75,
coefficient
approximately
0.7,
mass
2.84
mg
under
10
N
load.
In
comparison
lacking
showed
increase
around
4.8%,
decreased
by
5.1%,
diminished
59.4%.
These
hold
significant
implications
for
extending
operational
lifespan
electromagnetic
railguns.
Язык: Английский
Mechanical Properties of Silicon Carbide Composites Reinforced with Reduced Graphene Oxide
Materials,
Год журнала:
2024,
Номер
17(13), С. 3370 - 3370
Опубликована: Июль 8, 2024
This
article
presents
research
on
the
influence
of
reduced
graphene
oxide
mechanical
properties
silicon
carbide
matrix
composites
sintered
with
use
Spark
Plasma
Sintering
method.
The
produced
sinters
were
subjected
to
a
three-point
bending
test.
An
increase
in
flexural
strength
was
observed,
which
reaches
maximum
value
503.8
MPa
for
SiC–2
wt.%
rGO
composite
comparison
323
reference
SiC
sample.
hardness
decreases
content
down
1475
HV10,
is
correlated
density
results.
Measured
fracture
toughness
values
are
burdened
high
standard
deviation
due
presence
agglomerates.
KIC
range
3.22–3.82
MPa*m1/2.
Three
main
mechanisms
responsible
identified:
bridging,
deflecting,
and
branching
cracks.
Obtained
results
show
that
can
be
used
as
reinforcing
phase
matrix,
an
especially
visible
impact
strength.
Язык: Английский
Mechanical Performance and Tribological Behavior of WC-ZrO2 Composites with Different Content of Graphene Oxide Fabricated by Spark Plasma Sintering
Sci,
Год журнала:
2024,
Номер
6(4), С. 82 - 82
Опубликована: Дек. 10, 2024
This
paper
presents
research
on
the
effects
of
addition
various
contents
graphene
oxide
and
sintering
temperature
mechanical,
tribological,
electrical
characteristics
WC-ZrO2
composites.
Wet
processing
spark
plasma
provided
dense
samples
with
simultaneous
reduction
(rGO)
during
sintering.
The
obtained
results
showed
that
best
mechanical
properties
were
observed
at
a
1700
°C
in
0.5
vol.%
rGO
content;
namely,
indentation
fracture
toughness
(5.8
±
0.4
MPa·m1/2)
flexural
strength
(872
43
MPa)
increased
by
9%
24.3%
compared
sample
without
rGO.
In
to
improved
performance,
rGO-reinforced
composites
exhibited
lower
wear
rates
friction
coefficients
than
non-rGO
composites,
due
formation
graphitic
lubricating
tribolayer
worn
surfaces
counterbodies
pair,
which
sufficient
lubrication
reduce
coefficient
rate.
resulting
also
low
resistivity,
suggesting
possibility
using
discharge
machining
manufacture
ceramic
products
complex
shapes
from
them.
Язык: Английский