Re: Copper/ Bronze thermit: was: Something very odd on Ebay

I sold a bunch of such copper joining compounds under brand name Cadweld.

i

On 2008-01-28, Bruce in Bangkok <b_paige_125@xxxxxxxxx> wrote:
On Sun, 27 Jan 2008 11:51:56 -0800 (PST), furles@xxxxxxxxxxxxxxxxxx
wrote:

I think that Thermit gets a whole lot hotter that 2,000 F. BTW, there are
lots of ways to formulate Thermit. Aluminum will reduce many, many metallic
oxides yielding a pool of molten metal, be it Nickel, Chromium, Silver,
Cobalt, whatever. I've often wondered if you could obtain decent alloys this
way, by mixing say 80% Copper Oxide with 20% Tin Oxide, balance it out for
the Oxygen with Aluminum powder, and you "should" get bell bronze when you
burn it.

I've just seen this five year thread; this is the first time I've
visited his group, and Google won't let me reply to a post that old.
If it's of any interest, there was, and probably still is, a process
for attaching track circuit bonds to rail ends using a thermit-like
process, which produced some sort of copper/bronze metal. I don't
know the composition of either the mixture used, or the metal
produced. This process was quite common at one time, especially on
third-rail electrified lines, where very heavy bonds had to be used,
as they carried not only the track circuit current, but also the
traction return current, but the need for such bonds has been much
reduced by the use of continuous welded rail.


I think that you are talking abut the "thermo weld" process which uses
a powdered mix of copper oxide and aluminum to make electrical joins.
I believe that Mc masters Carr sell the kits. If not have a look at
www.mastercomm.net/exothermic_weld.htm.

Bruce-in-Bangkok
(Note:remove underscores
from address for reply)
.

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