Lubricants,
Journal Year:
2024,
Volume and Issue:
12(11), P. 401 - 401
Published: Nov. 20, 2024
In
the
study
at
hand,
a
systemic
investigation
regarding
tribochemical
effects
of
crankcase
soot
is
presented.
Sooted
oils
were
generated
via
an
engine
dynamometer
test.
Both
conventional
as
well
advanced
oil
condition
monitoring
methods
indicated
mild
degradation
additives.
The
wear
volume
was
greatly
increased
with
sooted
in
model
tribometer
tests,
despite
high
residual
zinc
dialkyl
dithiophosphate
(ZDDP)
antiwear
(AW)
levels.
Once
removed
ultracentrifugation,
returned
to
levels
comparable
fresh
oil.
Surface
investigations
revealed
that
ZDDP
tribofilms
could
not
form
oils,
only
thin
sulfide
layer
present
on
metal
surfaces.
Meanwhile,
typical
observable
centrifuged
oils.
results
tribocorrosive
mechanism
most
likely
responsible
for
elevated
where
iron
base
films
formed,
which
then
rapidly
by
particles
abrasive
manner.
Scientific Reports,
Journal Year:
2024,
Volume and Issue:
14(1)
Published: July 17, 2024
Abstract
This
article
discusses
a
focused
study
on
visualizing
the
flow
patterns
in
two-phase
pulsating
heat
pipe
(PHP)
using
Fe
3
O
4
/water
as
working
fluid
at
V/V%
concentration.
The
research
also
aims
to
meticulously
examine
phase
change
phenomena
heating
section,
particularly
focusing
bubble
formation
and
expansion
processes.
A
high-speed
video
camera
was
utilized
capture
dynamic
insights
into
behavior
of
mixture.
Based
findings,
straightforward
model
developed
explain
generation
growth
mixture,
serving
useful
reference
for
future
PHP
designs
optimizations.
Visual
observations
noted
stable
nature
nanofluid
over
4-day
period,
confirming
its
consistency
throughout
experiments.
Moreover,
impact
load
variation
evaporator
section
assessed
controlled
inputs
ranging
from
10
80
W.
Observations
arrangement
slugs
plugs
50%
filling
ratio
revealed
interesting
self-adjusting
response
increasing
inputs,
providing
valuable
operational
dynamics.
Notably,
oscillatory
/water,
chosen
fluid,
exhibited
greater
activity
comparison
water.
distinctive
contributed
achieving
heightened
thermal
performance
efficiency
system,
attributed
faster
attainment
annular
condition.
Tribology International,
Journal Year:
2024,
Volume and Issue:
199, P. 110007 - 110007
Published: July 18, 2024
In
response
to
the
mounting
concern
over
environmental
pollution
and
depletion
of
petroleum
reserves,
biolubricants
have
emerged
as
a
promising
alternative
mineral
oil-based
lubricants.
Thus,
aim
this
research
is
tribological
characterization
green
castor
soybean
nanolubricants
containing
functionalized
CaCO3
nanoparticles.
Friction
improvements
were
reached
with
maximum
friction
decreases
14
%
18
compared
oils.
Concerning
wear,
optimal
concentration
for
was
intermediate
0.15
wt%
width
wear
reductions
27
24
oils,
respectively.
Tribological
mechanisms
tribofilm
formation,
repairing
rolling-bearing
identified.
rolling-sliding
tests,
use
nanoparticles
crucial
at
low
speeds
outstanding
reductions.
Lubricants,
Journal Year:
2025,
Volume and Issue:
13(1), P. 28 - 28
Published: Jan. 10, 2025
Nanoparticles
exhibit
diverse
effects
when
added
as
additives
to
oily
medium,
enhancing
tribological
properties
and
surface
characteristics.
Studies
have
shown
that
many
oxide
ceramic
nanoparticles
improve
friction
wear,
while
mixtures
also
demonstrate
favorable
properties.
This
study
explores
the
effect
of
an
yttria–silica
(Y2O3,
SiO2)
nanoparticle
mixture
in
a
Group
III
base
oil
medium.
The
results
reveal
significantly
reduces
(−8–17%),
mean
wear
scar
diameter
(−32%),
volume
(−94%),
increasing
load-bearing
capacity
(+114%)
by
creating
durable
boundary
layer.
Observations
from
scanning
electron
microscopy
revealed
original
is
protected.
EDX
analyses
highlight
layer’s
elemental
composition,
which
high
yttrium,
silicon,
oxygen
found
higher
areas.
XRD
analysis
could
not
detect
yttria
additive
within
layer,
suggesting
it
fragmented
due
sliding
stress,
resulting
amorphous
structure
for
new
TEM
imaging
confirmed
layer
thickness
40–45
nm.
These
findings
significant
potential
industrial
applications
developing
advanced,
high-performance
lubricants
demanding
mechanical
systems.
Proceedings of the Institution of Mechanical Engineers Part N Journal of Nanomaterials Nanoengineering and Nanosystems,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 24, 2025
This
study
investigates
the
impact
of
incorporating
two
distinct
nanoadditives,
Graphene
Oxide
(GO),
and
Detonation
Nanodiamond
(DND),
into
standard
internal
combustion
engine
(ICE)
lubricant
to
reduce
friction
wear
under
real
operating
conditions.
Experiments
on
a
single
cylinder
gasoline
reveal
enhanced
brake
thermal
efficiency
reduced
piston
ring,
with
up
21%
increase
in
at
half
load
using
1
mg/l
GO.
The
DND-based
nanolubricant
demonstrates
superior
performance
compared
base
lubricant.
Both
maximum
weight
percentage
0.01
gm/l,
exhibit
unique
properties
–
spherical
DND
nanoparticles
act
as
nano
ball-bearing,
while
flake-like
GO
minimize
by
reducing
contact
area
between
mating
surfaces.
use
nanoadditives
increases
crankcase
temperature
17.5%,
attributed
conductivity
improved
convective
transfer.
surface
analysis
used
rings
shows
entrapped
nanoparticles.
X-ray
photoelectron
spectroscopy
(XPS)
reveals
40
nm
thick
tribofilm
rings,
highlighting
contribution
reduction
mechanisms.
research
underscores
potential
nanoadditive-enhanced
lubricants
for
improving
durability
real-operating
