Micromorphology and damage characterization of vacuum brazed stainless steel joints with laser etched interfaces
Materials Research Express,
Год журнала:
2025,
Номер
12(2), С. 026504 - 026504
Опубликована: Фев. 1, 2025
Abstract
This
study
investigates
the
effect
of
laser
etching
on
vacuum
welded
joints
through
organizational
observation
and
shear
testing.
The
residual
stress
in
various
sample
structures
during
brazing
process
was
analyzed
proposed
FE
models.
findings
indicate
that
improves
wetting
behavior
copper
material
AISI
304
stainless
steel
substrate.
However,
contrary
to
theoretical
expectations,
due
melting
splashing
base
etching,
loose
stacked
particles
are
formed.
With
increase
times,
strength
brazed
shows
a
gradual
decline
trend.
finite
element
results
microstructure
formed
by
promotes
generation
thermal
compressive
reduces
tensile
stress.
Язык: Английский
Research status and applications of different nanomaterials system based on ultrafast laser nanojoining technology
Wei Chen,
Yi Ma,
Libin Lu
и другие.
Journal of Laser Applications,
Год журнала:
2025,
Номер
37(2)
Опубликована: Март 3, 2025
With
the
development
of
aviation,
electronics,
and
energy
technologies,
nanomaterials
play
an
increasingly
important
role
in
manufacturing
micro-/nanodevices,
achieving
high-quality
joining
has
become
key
to
constructing
assembling
multifunctional
micro-/nanodevices.
Ultrafast
lasers
have
significant
advantages
such
as
extremely
high-pulse
density,
wide
material
adaptability,
small
processing
heat-affected
zone.
Therefore,
nanojoining
technology
based
on
ultrafast
direction.
This
article
provides
a
review
laser,
summarizing
principles,
characteristics,
application
status
three
major
laser
technologies
currently
available.
Furthermore,
this
elaborates
input,
damage
formation
nanojunctions
process
for
metal-metal,
metal-nonmetal,
nonmetal-nonmetal
nanomaterials.
Finally,
potential
applications
electronic
devices,
photodetectors,
biomedical
fields
were
explored
low
nanostructures
obtained
through
nanojoining.
Язык: Английский
Laser ablation in liquids: A versatile technique for nanoparticle generation
Optics & Laser Technology,
Год журнала:
2025,
Номер
186, С. 112705 - 112705
Опубликована: Март 4, 2025
Femtosecond laser-ablative aqueous synthesis of multi-drug antiviral nanoparticles
Nanomedicine,
Год журнала:
2025,
Номер
unknown, С. 1 - 9
Опубликована: Март 13, 2025
Nanomedicine
offers
a
number
of
innovative
strategies
to
address
major
public
health
burdens,
including
complex
respiratory
illnesses.
In
this
work,
we
introduce
multi-drug
nanoparticle
fabricated
using
femtosecond
laser
ablation
for
the
treatment
influenza,
SARS-CoV-2,
and
their
co-infections.
The
SARS-CoV-2
antiviral,
remdesivir;
influenza
baloxavir
marboxil;
anti-inflammatory,
dexamethasone,
were
co-crystalized
then
ablated
in
aqueous
media
pulsed
subsequently
surface
modified
with
cationic
polymer,
chitosan,
or
poly-d-lysine.
Physical
chemical
properties
characterized
multiple
complimentary
techniques.
Finally,
clinically
relevant
vitro
primary
mouse
trachea
epithelial
cell-air-liquid
interface
culture
model
was
used
analyze
antiviral
effect
our
nanoparticles
against
Influenza
Virus
A.
Our
final
exhibited
positive
zeta
potential
diameter
~73
nm.
Remdesivir,
marboxil,
dexamethasone
all
present
suspension
at
1:1:1
ratio.
Notably,
these
particles
potent
anti-influenza
effect,
decreasing
viral
titer
by
≈
4
logs
comparison
vehicle
controls.
Overall,
findings
demonstrate
great
promise
both
use
generate
anti-viral
effects
nanoformulation
illness.
Язык: Английский
Laser Generation of AlCrCuFeNi High-Entropy Alloy Nanocolloids
The Journal of Physical Chemistry C,
Год журнала:
2024,
Номер
128(46), С. 19815 - 19828
Опубликована: Ноя. 7, 2024
We
report
on
the
synthesis
of
AlCrCuFeNi
high-entropy
alloy
(HEA)
nanoparticles
(NPs)
using
pulsed
laser
ablation
target
in
two
different
solvents,
deionized
water
(DIW)
and
anhydrous
ethanol
(EtOH).
The
laser-generated
HEA
NPs
DIW
EtOH
show
a
bimodal
size
distribution
NPs.
compositional,
phase,
structural
analysis
microscopic
spectroscopic
techniques
reveals
formation
phases
nanostructures
these
solvents.
In
DIW,
core–shell
structure
which
shell
is
rich
Al
O
core
Cu–Ni
was
observed.
However,
EtOH,
solid
solution
scanning
transmission
electron
microscopy–EDS
revealed
that
segregation
driven
by
an
oxide.
statistical
chemical
composition
particles
trends
as
function
particle
size.
Larger
variation
their
composition,
content
plays
crucial
role
phase
NPs,
leading
to
compositional
oxide
layer
small
homogeneous
all
elements
Further,
calculation
physiochemical
thermodynamic
parameters
indicates
with
mixture
face-centered
cubic
body-centered
Based
experimental
results,
possible
growth
mechanism
morphologies
during
liquid
discussed.
Язык: Английский