Re: Melting points combined

I'm wondering if the pieces could be 'invested' and brought to temp in a
furnace. Perhaps a Reid technique type of ceramic cask with some
charcoal included to reduce the atmosphere?

Or laying the gold in close proximity to the copper and applying a
reducing slurry of ceramic as an initial coat or 2, then finsh investing
normally, place in kiln, ramp up to and down from target temp. See what
happens.

search for 'reid techinique'

Carl


Michael wrote:
> Never mind the experienc issue... I'm interested in the theory.
>
> So if the two metals were both well heated, fluxed, and in an inert
> atmosphere, it sounds like there is a reasonable chance of them fusing?
>
>
>
> "Ted Frater" <ted.frater@xxxxxxxxxx> wrote in message
> news:q46bf1hkg03snkq0ljlblfrat617h5eq1q@xxxxxxxxxx
>
>>Michael wrote:
>>
>>>Copper melts at 1,083 °C
>>>Gold (24k) melts at 1,063 °C
>>>Silver (pure) melts at 961 °C
>>>
>>>I would like to take a sheet of copper, 1mm thick, grave out an
>>>indentation
>>>(0.5mm deep) and then pour molten gold into the cavity.
>>>
>>>Assuming the metals are chemically clean, nicely fluxed, and so on, is it
>>>likely that the two metals will fuse nicely, or will I still need some
>>>solder?
>>>
>>>Thanks
>>>Michael
>>>
>>>
>>>
>>
>>In the absence of a full description of your skill level, workshop
>>experience etc, your going to need a lot more than solder to get the
>>results you describe.
>> The quickest way to find out of course is to try it yourself.
>>The professional metal workers here wouldnt mix fine gold with copper
>>unless someone put a lot of money up front. Our time is too valuable.
>> You will find if youve melted any gold that it has a very high surface
>>tension. even well fluxed youll find it well nigh impossible to get it
>>to flow as you want. Assuming you can keep your copper free of oxide at
>>the temperatures your talking about.
>> My guess is youll need a fully inert atmosphere like argon to work in,
>>or a reducing one all over the work, such as in a Craked ammonia tunnel
>>kiln thats one option. Do you have one?
>>.
>>
>
>
>
>

--
to reply, change ( .not) to ( .net)

.

Relevant Pages

  • Re: Sears/Statue of Liberty token question
    ... the Group 1B metals are known as the COINAGE ... > I'm pretty sure that you haven't seen all that many `gold' items either ... > more copper alloyed with gold rather than the other way round. ... copper bracelets are commonly sold via jewellers too Billy. ...
    (rec.collecting.coins)
  • Re: Pitted Gold Coins
    ... >>>noble metals? ... >> Copper is not a noble metal. ... A physicist may only consider gold, silver AND copper to be noble ...
    (rec.collecting.coins)
  • Re: Copper prices
    ... I am an investment planner in precious metals and energies markets. ... the average cost of gold has been increased from 280 US ... Zinc, copper, and silver are considered low end precious or semi-precious ...
    (alt.home.repair)
  • Re: Melting points combined
    ... Michael wrote: ... > I would like to take a sheet of copper, 1mm thick, grave out an indentation ... > Assuming the metals are chemically clean, nicely fluxed, and so on, is it ... The professional metal workers here wouldnt mix fine gold with copper ...
    (rec.crafts.jewelry)
  • Coppers a gold mine for brash thieves
    ... The world's thieves are pinching more than pennies these days. ... A humble conductor that's served humankind since the Stone Age, copper ... Commodity crime is hardly new. ... which needs even more metals like copper to build roads and stadiums ...
    (misc.transport.road)