From: Brock Hinzmann (bhinzmann@sric-bi.com)
Date: Mon Jun 13 2005 - 02:12:37 EEST
Metallic glass has been around for 45 years, as pointed
out in the article (I was writing papers about it 25 years
ago, when GE was dumping more than $100 million into
trying to commercialize it). Unfortunately, NewScientist
is not the best source of information, as they tend to
oversensationalize everything, Liquid Metal being a pefect
example. Improvements in overcoming brittle behavior are
probably welcome, but I am always concerned about the
widespread commercial acceptance of anything with
expensive ingredients.
Brock
On Fri, 10 Jun 2005 18:50:49 +0100 (BST)
ben halford <ben_halford2003@yahoo.co.uk> wrote:
>Metallic Glass - not quite below 100 deg C but
>nevertheless has potenital in RP
> http://www.newscientist.com/channel/mech-tech/mg18624931.000
>Regards
>Ben
>
>Jonathan Harris <j.j.harris@bham.ac.uk> wrote:
>
>... and then of course this might be really interesting
>(if you can get hold of any - sorry I know this probably
>doesn't fit your availability criterion):
>
>
>Quote from Nature, Research Highlights Vol 435|9 June
>2005
>(http://www.nature.com/nature/journal/v435/n7043/pdf/435716a.pdf)
>
>
>
>"Going soft
>Phys. Rev. Lett. 94, 205502 (2005)
>
>You can squeeze and mould it like putty. But
>the material developed by WeiHua Wang, of
>the Institute of Physics in Beijing, and his
>team is not a plastic made from polymers
>- it is a metallic glass that goes soft in
>boiling water.
>Wang's blend of cerium, aluminium and
>copper, with a dash of niobium, is completely
>amorphous. At room temperature, it has the
>hardness, toughness and electrical
>conductivity of a typical metal. When heated,
>it displays plastic properties, becoming
>malleable at just 68 C. This unusually low
>glass transition temperature, combined with
>resistance to crystallization, means the
>material should appeal to manufacturers."
>
>Sounds like fun to me!
>
>Regards,
>Jonathan.
>
>________________________________
>
>From: Jonathan Harris [mailto:j.j.harris@bham.ac.uk]
>Sent: 09 June 2005 08:57
>To: 'Eric Lie'
>Cc: RP-ML
>Subject: RE: [rp-ml] Materials for 3D Printer
>
>
>Some thoughts....
>
>Polycaprolactone melts at around 60 deg C and is
>relatively tough - a bit like nylon. Only drawback in my
>experience is that when molten (even using indirect
>methods, e.g. immersing in hot water) it sticks like
>crazy to just about anything. (People have tried RPing
>it before (Zein, Hutmacher, Tan and Teoh, Fused
>deposition modeling of novel scaffold architectures for
>tissue engineering applications, Biomaterials, Volume 23,
>Issue 4, 15 February 2002, Pages 1169-1185.
> (http://www.sciencedirect.com/science/article/B6TWB-44HSM83-T/2/ef9c2e7a48b05496fb1115ce0444ad0e)).
>
>
>Something else that might be suitable, which I came
>across courtesy of another list, is this:
>http://www.maplin.co.uk/Search.aspx?Criteria=polymorph&doy=9m6
>
>It melts at approx 60 deg and doesn't become adhesive
>when molten (though I have only ever used it in
>conjunction with the manufacturers instructions). I
>can't really comment on pricing as I don't know your
>definition of expensive.
>
>
>Regards,
>Jonathan.
>
>
>**************************************
>Biomaterials Unit
>University of Birmingham
>School of Dentistry
>UK.
>
>
>
>________________________________
>
>From: Eric Lie [mailto:EricLie@ntu.edu.sg]
>Sent: 09 June 2005 07:46
>To: rp-ml@rapid.lpt.fi
>Subject: [rp-ml] Materials for 3D Printer
>
>
>
>Dear all,
>
>
>
>Does anyone have any idea of a material that has melting
>point of lower than 80 degrees Celsius or below that
>won't give out foul burnt smell and yet still not brittle
>(e.g. cannot be wax)?
>
>
>
>I am looking for materials for home-based 3D printer. The
>materials cannot be expensive (ie commonly available).
>
>Thank you very much for the help.
>
>
>
>Cheers,
>
>Eric
>
>
>---------------------------------
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