Zinc
alloys
have
emerged
as
promising
candidates
for
biodegradable
materials
due
to
their
remarkable
biocompatibility
and
favorable
mechanical
characteristics.
The
incorporation
of
alloying
elements
plays
an
essential
role
in
advancing
the
tensile
strength
Zn
alloys.
Nevertheless,
achieving
uniform
dispersion
these
poses
challenges
chemical
segregation
during
solidification.
In
this
study,
rapid
solidification
followed
by
high-pressure
torsion
was
successfully
employed
fabricate
Zn-Li-Mn-Mg-Cu
characterized
ultrafine-grained
microstructures
with
evenly
distributed
nanometric
intermetallic
phases.
A
comprehensive
examination,
including
phase
composition,
microstructural
evolution,
properties
deformation
mechanisms,
conducted.
impact
varying
annealing
temperatures
on
stability
systematically
examined.
combined
implementation
yielded
average
grain
size
below
360
nm,
thereby
demonstrating
exceptional
yield
stress
(YS),
ultimate
(UTS),
elongation
failure
(Ef)
equal
at
least
325±6
MPa,
350±8
MPa
40±11
%,
respectively.
Heat
treatment
notably
augmented
properties,
resulting
a
YS
=
440±11
UTS
491±6
while
preserving
plasticity
(Ef
23±4
%)
Zn-0.33Li-0.27Mn-0.14Mg-0.1Cu
alloy.
Nanoindentation
strain
rate
jump
tests
identified
boundary
sliding
diffusion
primary
mechanisms.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: June 27, 2024
Wearable
and
implantable
active
medical
devices
(WIMDs)
are
transformative
solutions
for
improving
healthcare,
offering
continuous
health
monitoring,
early
disease
detection,
targeted
treatments,
personalized
medicine,
connected
capabilities.
Commercialized
WIMDs
use
primary
or
rechargeable
batteries
to
power
their
sensing,
actuation,
stimulation,
communication
functions,
periodic
battery
replacements
of
implanted
pose
major
risks
surgical
infections
inconvenience
users.
Addressing
the
energy
source
challenge
is
critical
meeting
growing
demand
WIMD
market
that
reaching
valuations
in
tens
billions
dollars.
This
review
critically
assesses
recent
advances
harvesting
storage
technologies
can
potentially
eliminate
need
replacements.
With
a
key
focus
on
advanced
materials
enable
harvesters
meet
needs
WIMDs,
this
examines
crucial
roles
efficiencies
harvesters,
wireless
charging,
devices.
concludes
by
highlighting
challenges
opportunities
necessary
achieve
vision
self-powered
wearable
devices,
eliminating
associated
with
replacement
frequent
manual
recharging.
Advanced Science,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 26, 2024
Abstract
With
the
integration
of
bioelectronics
and
materials
science,
implantable
self‐powered
systems
for
electrical
stimulation
medical
devices
have
emerged
as
an
innovative
therapeutic
approach,
garnering
significant
attention
in
research.
These
achieve
self‐powering
through
integrated
energy
conversion
modules,
such
triboelectric
nanogenerators
(TENGs)
piezoelectric
(PENGs),
significantly
enhancing
portability
long‐term
efficacy
equipment.
This
review
delves
into
design
strategies
clinical
applications
systems,
encompassing
optimization
harvesting
selection
fabrication
adaptable
electrode
materials,
innovations
systematic
strategies,
extensive
utilization
biological
therapies,
including
treatment
neurological
disorders,
tissue
regeneration
engineering,
drug
delivery,
tumor
therapy.
Through
a
comprehensive
analysis
latest
research
progress,
technical
challenges,
future
directions
these
areas,
this
paper
aims
to
provide
valuable
insights
inspiration
further
systems.
Advanced Energy and Sustainability Research,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 16, 2025
As
the
environmental
pollution
caused
by
electronic
products
becomes
increasingly
severe,
development
and
application
of
biodegradable
batteries
have
become
more
important.
Traditional
are
limited
low
power
output,
capacity,
lack
flexibility
stretchability,
restricting
their
range
applications.
Herein,
a
battery
made
from
magnesium–molybdenum
electrodes
gelatin‐organic
acid
electrolytes
such
as
lactic
(LA)–gelatin
(gel)
citric
(CA)–gelatin
is
proposed.
The
addition
organic
acids
to
gelatin
increases
ionic
conductivity
electrolyte
promotes
its
reaction
with
magnesium
electrode,
effectively
enhancing
performance.
In
experimental
results,
it
shown
that
LA–gel‐based
achieves
maximum
2.37
×
10
−
3
S
cm
1
,
while
CA–gel‐based
demonstrates
activation
energy
11.04
kJ
mol
.
highest
open‐circuit
voltage
recorded
for
Mg
anode
Mo
cathode
1.92
V,
related
plateau
around
1.3
V.
capacity
achieved
Mg‐based
76.8
μW
1.36
mAh
2
respectively,
at
40
μA
LA–gel
battery.
Moreover,
can
be
stretched
80%
strain
maintaining
stable
capacity.
The Philosophical Magazine A Journal of Theoretical Experimental and Applied Physics,
Journal Year:
2024,
Volume and Issue:
104(6-8), P. 389 - 405
Published: Jan. 26, 2024
The
Geometrically
Necessary
Dislocation
(GND)
density
was
estimated
from
Electron
Backscatter
Diffraction
(EBSD)
data
for
an
AZ31/Mg-0.6Gd
(wt.%)
hybrid
material
fabricated
by
high-pressure
torsion
(HPT)
at
room
temperature
through
equivalent
strain
range
of
ϵeq
=
0.3–144
using
Kernel
Average
Misorientation
(KAM)
and
the
Nye
tensor
approaches.
results
show
that
generally
GND
densities
are
significant
beginning
deformation
(ϵeq
0.3)
decrease
in
both
alloys
when
increases.
Mg-0.6Gd
alloy
exhibits
a
lower
due
to
rapid
dynamic
recrystallization.
These
were
compared
measured
AZ31
mono-materials
processed
separately
HPT
under
same
experimental
conditions.
In
these
increase
with
increasing
up
7
then
further
straining.
regions
exhibit
higher
than
particularly
low
where
disc
thickness
bonding
interfaces
cause
more
heterogeneity
material.
It
is
shown
evolution
as
function
has
tendency
KAM
approaches
but
average
values
significantly
approach.
An
analysis
suggests
approach
overestimates
Mg-based
alloys.
