FU Money + Meets the (Next Big) Thing

[rudy rouhana]

No, I recall from that TiAl3 was unique in that it's strength increased under
high temperatures (or at least did not decrease significantly), making it
unique and ideal for turbine blades.  Since you can run them hotter, you gain
efficiency.  I thought that it was licensed out to Allison Gas Turbine (owned
by Rolls Royce), though I'm not sure if it is an exclusive license.

Actually, I just googled TiAl3, it's actually Titanium Aluminide, and is also
used in semi-conductor applications.  However, this paper confirms what I
mentioned earlier:

"Typical Applications: 
TiAl turbine blades to replace superalloys due to lower density and higher
operating temperatures, US national aerospace plane, air frames, investment
casting, automotive engine valves, turbocharger rotors"

http://www.reade.com/Products/Aluminides/titanium_aluminide.html

Actually, my materials professor was cited on some paper relating to it as
well:

TiN-BASED, ACTIVE METAL CONTAINING SOLDERS FOR JOINING OF ALUMINA: Tim Schwilm,
O.T. Inal and Frederick G. Yost, Materials and Metallurgical Engineering
Department, New Mexico Tech, Soccoro, NM 87801; Sandia National Laboratories,
Albuquerque, NM 87815

-Rudy

--- "Adam L. Beberg" <beberg@mithral.com> wrote:
> On Mon, 12 Nov 2001, rudy rouhana wrote:
> 
> > Are those TitaniumAlumina (Ti 1 Al 3 ) blades?  I believe they get
> > stronger as they are heated up.
> 
> Whoa, wanna 'splain that one?
> 
> I assume you mean it's brittle when cold, for hot values of cold.
> 
> - Adam L. "Duncan" Beberg
>   http://www.iit.edu/~beberg/
>   beberg@mithral.com
> 
> 
> 
> http://xent.com/mailman/listinfo/fork


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