Materials Research Express,
Год журнала:
2024,
Номер
11(7), С. 076518 - 076518
Опубликована: Июль 1, 2024
Abstract
This
study
investigates
solid-state
diffusion
bonding
between
two
INCONEL
617
alloy
samples
using
field-assisted
sintering
technology
(FAST).
The
focuses
on
analyzing
the
faying
surface
validating
theoretical
design
modeling
done
by
CALculation
of
PHAse
Diagrams
(CALPHAD)
approach
followed
experimental
validation.
Varying
kinetics’
limitations
enabled
phase
stability
and
control
governed
CALPHAD
design.
contains
a
pseudo-binary
diagram
assisted
with
thermal
mapping
property
to
obtain
optimum
temperature
while
understanding
fields
their
evolution
through
Molybdenum
(Mo)
increasing
content
increase.
FAST
parameters
recommended
were
800
°C
under
10
MPa
pressure
holding
time
30
min.
investigation
observations
promising
in
way
that
gamma
(
γ
)
only,
further
region
prime
′).
It
is
worth
mentioning
joining
resulted
fine
thickness
around
μ
m
controlled
heat
affected
zone
(HAZ)
leading
relevant
reduction
recrystallization
yielding
an
average
grain
size
60–100
before
after
bonding.
Furthermore,
modes
metal
carbide
(MC)
have
been
found;
MC
formed
micro-MC
pools
surface.
Journal of Physics Condensed Matter,
Год журнала:
2025,
Номер
37(11), С. 115601 - 115601
Опубликована: Янв. 2, 2025
Abstract
We
report
the
detailed
investigation
of
magnetic,
transport,
and
magnetocaloric
effects
(MCEs)
GdSbSe
by
magnetic
susceptibility
χ(T
stretchy="false">)
,
isothermal
magnetization
M
(
H
),
resistivity
ρ,H
heat
capacity
Cp
measurements,
crystallizing
in
ZrSiS-type
tetragonal
crystal
system
with
space
group
P4/nmm.
Temperature-dependent
measurements
revealed
long-range
antiferromagnetic
ordering
two
additional
anomalies
below
Néel
temperature
N≈8.6
K),
corroborated
through
specific
studies.
Isothermal
unveil
hidden
metamagnetic
signatures
a
clear
deviation
from
linearity.
In
addition,
enhanced
value
Sommerfeld
coefficient
γ
=
152(5)
mJ
mol
−1
K
2
)
suggests
strong
electronic
correlations
GdSbSe.
The
entropy
derived
isotherms
unfolds
field-induced
transition
Inverse
MCE
to
Conventional
MCE.
transport
properties
indicate
semimetallic
behavior,
strongly
coupled
order.
Furthermore,
linear
field
dependence
MR
high-field
region
anticipate
possibility
Dirac-like
dispersion.
Deviations
Kohler’s
rule
non-linear
Hall
suggest
multiband
nature
Journal of Applied Physics,
Год журнала:
2025,
Номер
137(4)
Опубликована: Янв. 22, 2025
Soft
magnetic
materials
with
high
operating
frequency
and
low
power
loss
are
crucial
for
electricity
transmission
utilization.
However,
finding
an
effective
method
to
improve
the
while
minimizing
in
these
remains
a
significant
challenge.
Herein,
we
synthesized
(Y1−xSmx)2Fe14B
(0≤x≤1)
compounds
introduced
nitrogen
atoms
into
their
interstitial
crystal
sites
via
gas–solid
reaction,
remarkably
improving
reducing
loss.
For
x
=
0.15,
increased
from
1.7
5.5
MHz,
imaginary
part
of
relative
permeability
decreased
6.1
1.6.
The
1607.7
664.1kW/m3,
separation
indicated
that
eddy
current
Peddy
was
significantly
suppressed
by
nitriding
1397.7
547.9kW/m3.
conductivity
approximately
43%
nitriding,
9380.9
5359.0
S/m.
These
results
demonstrate
tuning
through
nitrogenation
rare-earth
transition
metal
intermetallic
is
developing
new
high-frequency
soft
materials.
Journal of the American Ceramic Society,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 4, 2025
Abstract
Herein,
we
report
on
the
structural,
magnetic,
dielectric,
and
optical
properties
of
La‐doped
Sr
2‐
x
La
Fe
0.5
Hf
1.5
O
6
(SLFHO,
0.0
≤
2.0)
double
perovskite
oxides
synthesized
by
solid‐state
reaction
method.
X‐ray
powder
diffraction
data
their
Rietveld
refinement
reveal
that
SLFHO
powders
crystallize
in
an
orthorhombic
structure
with
Pnma
space
group.
The
exhibit
spherical
morphology
average
particle
size
160
nm,
as
shown
from
SEM
images.
Their
molar
ratios
Sr:La:Fe:Hf
elements
were
determined
1.77:0.50:0.50:1.95
energy
dispersive
spectroscopy
data,
approaching
nominal
stoichiometry.
photoelectron
spectra
verified
2+
,
3+
4+
(Hf
x+
)
ions
existed
powders,
oxygen
species
lattice
adsorbed
oxygen,
respectively.
ferromagnetic
behavior
at
2
300
K,
respectively,
K
saturated
magnetization
was
5.66
emu/g
(or
0.60
μ
B
/f.u.).
Magnetic
transition
temperature,
T
C
to
be
867
K.
Dielectric
measurements
demonstrated
a
strong
frequency‐dependent
dielectric
observed
ceramics
relaxor‐like
appearing
temperature
range
200–600
Such
is
ascribed
response
singly‐ionized
vacancies
(
activation
0.54
eV.
Room
examined
using
UV–vis
diffuse
reflectance
high
absorption
this
wavelength
region,
wide
indirect
bandgap
E
g
=
3.39
eV)
estimated
Tauc's
relation
spectra.
display
high‐temperature
ferrimagnetism,
behavior,
bandgap,
making
them
potential
employed
fields
spintronics
magnetic
semiconductor
devices.
Scientific Reports,
Год журнала:
2025,
Номер
15(1)
Опубликована: Апрель 5, 2025
The
synthesis
of
lanthanum
(La)
substituted
Zn
(Mn0.6Zn0.2La0.2Fe2O4)
and
Fe
(Mn0.6Zn0.4La0.2Fe1.8O4)
was
performed
using
sol-gel
auto-combustion
techniques
to
investigate
the
effects
doping
on
structural
magnetic
properties
Mn-Zn
nanoferrites.
X-ray
diffraction
transmission
electron
microscopy
confirmed
development
a
single-phase
spinel
structure
reduction
in
crystallite
size
(from
16
10.7
nm)
with
La
substitution.
Although
saturation
magnetization
(Ms)
decreased
due
changes
cation
distribution
interactions,
led
an
increase
initial
permeability.
This
enhancement
linked
Ms
magneto-crystalline
anisotropy
constant
(K1).
permeability
loss
factor
(tan
δµ)
remained
low
(around
10-
2)
for
La-doped
ferrites,
indicating
minimal
energy
at
room
temperature.
These
results
suggest
promising
potential
advanced
biomedical
applications,
line
Sustainable
Development
Goals
(SDGs).
technique
provides
scalable
environmentally
friendly
method
synthesizing
these
materials,
supporting
SDG
targets
related
responsible
consumption
production
(SDG
12).
