International Journal of Applied Ceramic Technology,
Год журнала:
2024,
Номер
21(4), С. 2915 - 2922
Опубликована: Фев. 27, 2024
Abstract
Si
3
N
4
ceramics
with
high
mechanical
properties
and
thermal
conductivity,
exhibiting
fine
bimodal
microstructure,
were
prepared
by
adjusting
the
Er
2
O
/MgO
ratio
hot‐pressing
sintering
at
1800°C
for
h.
The
grain
distribution,
lattice
oxygen
content,
properties,
crack
propagation
process
of
sintered
bulk
samples
systematically
investigated.
It
was
found
that
a
low
contributed
to
densification
ceramics,
whereas
favored
growth
ceramics.
In
this
research,
size
distribution
average
diameters
as
well
their
impact
on
examined.
When
3:1,
had
larger
diameter
higher
but
somewhat
reduced.
2:2,
sample
displayed
enhanced
performance,
which
can
be
explained
formation
structure.
research
indicates
it
is
feasible
control
microstructure
optimize
tailoring
additives.
Journal of Materials Research and Technology,
Год журнала:
2024,
Номер
29, С. 4833 - 4844
Опубликована: Фев. 27, 2024
To
solve
the
problem
of
deterioration
oxidation
resistance
and
thermal
shock
caused
by
low
carbonization
MgO–C
refractories,
nano-laminated
BN
modified
graphite
was
prepared
molten
salt
method
to
reinforce
unfired
refractories.
The
findings
revealed
that
introduction
significantly
improved
mechanical
properties.
Moreover,
index
refractories
with
4
wt%
34%
lower
than
unadded
samples,
residual
strength
after
increased
224%.
Furthermore,
incorporating
facilitated
formation
columnar
Mg2SiO4,
octagonal
MgAl2O4,
MgO–Mg2SiO4–MgAl2O4–Mg3B2O6
dense
layers,
thereby
contribute
overall
performance
improvements.
Journal of the American Ceramic Society,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 13, 2024
Abstract
MgO–C
refractories
are
of
paramount
importance
in
the
converter
side
blowing
system,
requiring
outstanding
oxidation
resistance
under
harsh
conditions
including
high
temperature,
oxygen
atmosphere,
and
high‐speed
airflow.
In
this
study,
MgSiN
2
phase
reconstruction
was
used
to
improve
refractories,
as
well
mechanical
properties
were
evaluated.
The
results
indicated
that
cold
modulus
rupture
sample
with
9
wt%
increased
by
93.3%
compared
without
.
After
tests,
index
rate
constant
(
k
)
reduced
38.9%
35.3%.
Furthermore,
incorporating
facilitated
formation
layered
dense
structures
consisting
plate‐like
Mg‐Sialon
MgO–Mg
SiO
4
–MgAl
O
This
structural
optimization
effectively
inhibited
diffusion
reaction
within
material,
resulting
gradual
potential
mitigation.
Journal of the American Ceramic Society,
Год журнала:
2024,
Номер
107(6), С. 3881 - 3894
Опубликована: Янв. 16, 2024
Abstract
The
CNTs/MgAl
2
O
4
whiskers
composite
reinforcement
was
prepared
by
catalytic
carbon‐bed
sintering
and
added
to
low‐carbon
Al
3
‐C
refractories
enhance
the
thermal
shock
resistance
of
refractories.
effects
Ni(NO
)
·6H
content
on
phase
microstructure
were
investigated.
nano‐indentation
technology
used
quantitatively
evaluate
effect
refractories,
toughening
mechanism
further
results
revealed
that
inner
outer
diameters
CNTs
approximately
5.69
16.26
nm,
respectively.
winded
around
interlocking
structural
MgAl
with
a
high
aspect
ratio
(>100),
which
beneficial
dispersion
in
refractory
matrix.
significantly
improved
adding
3.0
wt.%
(named
C3).
specific
fracture
energy
matrix
residual
strength
C3
reached
141
N·m
−1
39.2%,
29.4%
97.0%
higher
than
those
blank
sample
(109
19.9%),
This
is
because
reinforced
whiskers,
promoting
occurrence
“bridging”
“crack
deflection”
generation
microcracks
