Tribology - Materials Surfaces & Interfaces,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 9, 2025
This
study
evaluates
the
tribological
performance
of
Fe-based
composite
coatings
for
aerospace
and
automotive
applications,
focusing
on
wear
resistance
at
elevated
temperatures.
The
coatings,
comprising
15%
WC-Co
Cr
3
C
2
in
an
SS316L
matrix,
were
deposited
onto
maraging
steel
via
HVOF
spraying.
Microstructural
analysis
adhesive
strength
testing
confirmed
strong
particle
bonding,
with
achieving
a
hardness
711
±
14
HV.
Dry
sliding
behaviour
was
assessed
using
ball-on-disc
tribometer
alumina
as
counterface
under
10
N
30
loads
25
°C,
300
600
°C.
Results
indicated
decrease
coefficient
friction
specific
rate
increasing
load
temperature.
At
rates
reduced
by
∼97.56%
(10
N)
∼97.12%
(30
than
uncoated
steel.
Abrasive
dominated
room
temperature,
while
oxidative
mechanisms
emerged
attributed
to
protective
glaze
layer
formation.
Materials,
Год журнала:
2023,
Номер
16(8), С. 3250 - 3250
Опубликована: Апрель 20, 2023
Titanium
(Ti)
and
its
alloys
have
been
widely
employed
in
aeronautical,
petrochemical,
medical
fields
owing
to
their
fascinating
advantages
terms
of
mechanical
properties,
corrosion
resistance,
biocompatibility,
so
on.
However,
Ti
face
many
challenges,
if
they
work
severe
or
more
complex
environments.
The
surface
is
always
the
origin
failure
for
workpieces,
which
influences
performance
degradation
service
life.
To
improve
properties
function,
modification
becomes
common
process
alloys.
present
article
reviews
technology
development
laser
cladding
on
alloys,
according
technology,
materials,
coating
function.
Generally,
parameters
auxiliary
could
influence
temperature
distribution
elements
diffusion
molten
pool,
basically
determines
microstructure
properties.
matrix
reinforced
phases
play
an
important
role
coating,
can
increase
hardness,
strength,
wear
oxidation
excessive
addition
particles
deteriorate
ductility,
thus
balance
between
functional
basic
should
be
considered
during
design
chemical
composition
coatings.
In
addition,
interface
including
phase
interface,
layer
substrate
plays
stability,
thermal
reliability.
Therefore,
state,
substrate,
processing
parameters,
comprise
critical
factors
prepared.
How
systematically
optimize
influencing
obtain
well-balanced
are
long-term
research
issues.
Surface and Coatings Technology,
Год журнала:
2023,
Номер
464, С. 129556 - 129556
Опубликована: Апрель 26, 2023
Despite
ongoing
optimization
of
WC-Co
Direct
Energy
Deposition-based
cladding,
the
deposition
multilayer
coating
is
currently
challenging.
Pores
and
cracks
that
extended
along
deposit
thickness
have
been
always
observed
in
medium-large
coatings.
The
change
substrate
from
steel
to
hard
metal
deposition,
replaces
all
thermal
characteristics
dilution
modes.
This
study
looks
into
ways
improve
quality
multilayers
for
cutting
application
by
remelting
between
subsequent
layers.
In
order
define
key
process
parameters
identify
effects
remelting,
coatings
are
first
examined
a
single-track
single-layer
simplified
condition.
These
initial
tests
demonstrate
reduces
porosity
"white
layer"
microstructural
modification.
configuration
was
then
examined,
thorough
analysis
microstructure
revealed
an
enrichment
Fe-Co-C
elements
surface
advantageous
second
layer.
Remelting's
on
discussed,
method's
advantages
drawbacks
made
clear
potential
future
application.
Journal of Materials Research and Technology,
Год журнала:
2024,
Номер
30, С. 6910 - 6923
Опубликована: Май 1, 2024
Carbon
nanotubes
(CNTs),
as
a
kind
of
nanopowder,
can
be
used
reinforcing
powder
to
improve
various
properties
coatings
because
their
good
self-lubricating
and
three-dimensional
structure.
However,
CNTs
are
difficult
mix
uniformly
with
other
powders
due
easily
disrupted
microstructure
extremely
low
density.
Therefore,
CoCrFeNiMn
HEA
2
wt.%
were
mixed
by
new
mixing
method—alcohol
stirring
ball-less
ball
mill
methods.
/2
prepared
laser
cladding
(LC).
The
phase
composition,
microstructure,
wear
resistance,
corrosion
resistance
the
HEA/CNTs
coating
analyzed
characterization
techniques.
results
showed
that
grain
refinement
occurred
in
after
adding
CNTs,
generating
fine
carbides.
It
was
calculated
densification
percentage
increased
porosity
decreased.
Compared
coating,
microhardness
101.66%,
friction
coefficient
rate
only
63.30%
6.22%
coating.
more
positive
Ecorr
smaller
Icorr
indicated
has
better
resistance.
