Everything you thought you knew
about metal forming and the like just got thrown out the window. We can now blow mold metal structures at low
temperatures in seconds.
The pictures already show us a
wide range of capability and certainly compares directly to plastic forming. Since the material is also amorphous, I suspect
that surface oxidation is not too much of an issue even.
These products will have a
material cost that is equivalent to high quality steel but a negligible
fabrication cost. The overall result
will be a leap in wear ability for blown plastic like products in exchange for
a small increase in cost and well within the expectation envelope.
They will be used across all aspects
of manufacturing because they allow weight to be removed and strength to be
retained.
We have now seen a fabrication
technology that can be applied to the manufacture of the Magnetic Field
Exclusion Vessel which is better known as an UFO. This was strongly indicated but never
confirmed or understood. Now we can
replicate exactly what we have seen.
New material combines the strength of steel and the moldability of
plastic
By Darren
Quick
00:36 March 1, 2011
Jan Schroers and his team have developed novel metal alloys that can be
blow molded into virtually any shape
Scientists at Yale University have done what materials scientists
have been trying to do for decades – create a material that boasts the look,
strength and durability of metal that can be molded into complex shapes as
simply and cheaply as plastic. The scientists say the development could have
the same impact on society as the development of synthetic plastics last
century and they have already used the novel metals to create complex shapes,
such as metallic bottles, watch cases, miniature resonators and biomedical
implants, that are twice as strong as typical steel and can be molded in less
than a minute.
Unlike the crystalline structure found in ordinary metals that makes
them strong but also results in them requiring three separate steps for
processing (shaping, joining and finishing), the metal alloys recently
developed by the Yale team are amorphous metals known as bulk metallic glasses
(BMGs), whose randomly arranged atoms and low critical cooling rate allows them
to be blow-molded into complex shapes like plastics. This allows the
researchers to combine the three traditional time- and energy-intensive metal
processing steps into one blow molding process that takes less than a minute.
Although the different metals used to make the alloys, such as
zirconium, nickel, titanium and copper, cost about the same as high-end steel,
they can be processed as cheaply as plastic, according to Jan Schroers, a
materials scientist at Yale that led the team.
The BMGs ability to soften and flow as easily as plastic at low
temperatures and low pressures, without crystallizing like regular metal is
what allows the material to be shaped with unprecedented ease, versatility and
precision, Schroers said. To ensure the ideal temperature for blow molding
was maintained, the team shaped the BMGs in a vacuum or in fluid.
"The trick is to avoid friction typically present in other forming
techniques," Schroers said. "Blow molding completely eliminates
friction, allowing us to create any number of complicated shapes, down to the
nanoscale."
Schroers and his team have already fabricated a wide variety of shapes
and devices using the new processing technique, including miniature resonators
for microelectromechanical systems (MEMs) and gyroscopes, but they say that is
just the beginning.
"This could enable a whole new paradigm for shaping metals,"
Schroers said. "The superior properties of BMGs relative to plastics and
typical metals, combined with the ease, economy and precision of blow molding,
have the potential to impact society just as much as the development of
synthetic plastics and their associated processing methods have in the last
century."
The new processing technique developed by the Yale researchers is
described online in the current issue of Materials Today.
1 comment:
Cool! We are still inventing!
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