Publication: Micro-fast for the sintering of the superconductor material YBCO
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Publication date
2015
Defense date
2015-07-10
Authors
Tutors
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Abstract
In
the
last
twenty
years,
a
large
number
of
investigations
and
research
groups,
for
the
development
of
miniaturization
of
products
and
devices
used
in
the
industry,
can
be
found.
It
has
been
noticed
that
the
demand
for
micro-‐scale
manufactured
parts
has
experimented
a
strong
increased.
A
novel
microforming
technology,
named
Micro-‐FAST
has
become
one
of
the
most
promising
methods
for
micromanufacturing
with
a
competitive
and
efficient
low
cost,
which
results
a
very
important
requirement
to
take
into
account
nowadays.
Micro-‐FAST
is
the
field
assisted
sintering
technique
and
it
was
first
proposed
by
a
group
of
researchers
for
the
forming
of
microcomponents.
Some
of
the
researchers,
working
on
the
improvement
and
development
of
this
technique,
are
part
of
the
Design,
Manufacturing
and
Engineering
Management
department
of
the
university
of
Strathclyde,
where
the
experiments
mentioned
in
this
project
have
been
carried
out.
Following
the
knowledge
and
previous
work
they
have
performed
with
different
materials,
in
this
project
it
has
been
realized
a
Micro-‐FAST
using
a
superconductor
material,
Yttrium
Barium
Copper
Oxide,
known
as
YBCO
or
Y-‐123.
Oxide
superconductors
are
presenting
a
high
attractive
for
technical
applications
recently,
since
it
has
been
demonstrated
they
can
act
as
superconductors
at
liquid
nitrogen
temperature.
Because
of
this,
it
has
been
considered
it
can
be
a
great
challenge
to
carry
out
a
Micro-‐FAST
with
this
kind
of
material,
as
it
is
something
that
is
no
record
on
any
previous
report
or
magazine.
This
project
consists
in
6
chapters,
where
can
be
found
a
full
study
of
the
features
of
this
superconductor
material
as
well
as
of
the
characteristics
and
considerations
to
take
into
account
for
the
production
of
dense
YBCO
bulk
from
powders
of
this
material,
using
Micro-‐
FAST.
It
also
shows
the
resulting
samples
obtained
after
the
sintering
process
carried
out
in
a
3800
Gleeble
machine
at
the
Imperial
College
in
London.
The
different
parameters
selected
for
the
several
experiment
are
indicated
and
it
can
be
also
observed
a
deep
analysis
of
the
microstructure
and
the
relative
density
of
the
samples
using
high
quality
devices
provided
by
the
university.
The
goal
of
the
present
work
is
to
fabricate
highly
dense
YBCO
body
by
Micro-‐FAST
in
order
to
improve
the
sintering
time
and
also
analyse
the
effect
on
the
microstructure
and
density
when
some
parameters,
such
as
sintering
temperature,
pressure,
heating
rate
and/or
holding
time,
are
changed.
Description
Keywords
Superconductor materials, Micromanufacturing, Micro-FAST, Materiales superconductores