MATEC Web of Conferences,
Год журнала:
2024,
Номер
406, С. 06003 - 06003
Опубликована: Янв. 1, 2024
In
lightweight
high-entropy
alloy
development,
a
titanium-
aluminium
(TiAl)
base
matrix
is
favored
for
its
low
density,
high
strength-
to-weight
ratio,
and
excellent
corrosion
resistance.
Multi-component
alloys
using
TiAl
have
shown
stability
under
temperatures.
This
study
aimed
to
develop
by
adding
chromium
(Cr),
manganese
(Mn),
molybdenum
(Mo)
the
matrix,
forming
an
AlxCrMn5MoTi
alloy.
CALPHAD
models
were
employed
establish
phase
formation
rules
used
assess
thermodynamic
stability.
The
resulting
Al
x
CrMn
5
MoTi
features
body-centered
cubic
solid-solution
phase,
solidus
temperature
exceeding
1600°C,
density
6.2
g/cm³,
Young's
modulus
of
over
190
GPa.
properties
measured
include
mixing
entropy
(10.9
11.9
J/K),
enthalpy
(-11.5
-18.1
kJ/mol),
Omega
parameter
(Ω)
at
least
1.1,
atomic
size
difference
(δ)
no
greater
than
6.6%,
valence
electron
concentration
(VEC)
ranging
from
4.89
4.83.
shows
significant
promise
transportation,
energy,
industrial
applications,
meeting
demands
lightweight,
high-temperature,
corrosion-
resistant
materials.
The
interface
engineering
includes
intricate
procedures
for
the
development
of
heterostructures
and
heterojunctions,
modifying
composition
at
interface,
optimizing
interfacial
area
to
enhance
H
2
catalytic
performance.
Applied Sciences,
Год журнала:
2025,
Номер
15(9), С. 4859 - 4859
Опубликована: Апрель 27, 2025
The
purpose
of
this
article
is
to
evaluate
and
compare
the
mechanical
electrochemical
properties
four
new
materials,
composed
a
B4C
ceramic
matrix
doped
with
0.5%,
1%,
2%
3%
volumes
CoCrFeNiMo
HEA
monolithic
B4C.
studied
samples
were
obtained
using
spark
plasma
sintering
technique.
structure
hardness
analyzed
via
scanning
electron
microscopy
(SEM)
Vickers
microhardness
test.
After
immersion
in
artificial
sea
water
simulate
corrosive
marine
environment,
corrosion
potential,
rate
impedance
spectroscopy
tests
carried
out
determine
samples’
behavior.
Tafel
slopes
equivalent
circuit
that
fit
EIS
experimental
data
obtained.
A
denser
microstructure
smaller
grain
size
was
achieved
as
content
increase.
According
measurements,
every
sample
showed
normal
distribution.
All
exhibit
great
resistance
two-step
chemical
interaction,
influenced
by
presence
Warburg
element.
research
demonstrates
increasing
implies
better
performance
properties,
confirming
materials’
potential
use
environments
harsh
applications.
