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Nitrogen Melting Palladium


#1

Is it possible to use nitrogen in place of argon during the melting
process? I am using .952 palladium alloyed with ruthenium and
gallium. I am using a Yasui vacuum centrifigal casting machine.


#2

Hi,

Is it possible to use nitrogen in place of argon during the
melting process? I am using.952 palladium alloyed with ruthenium
and gallium. 

Since I’m not a chemist or experienced caster, I’ll let those with
the proper credentials give the definitive answer.

However, the reason argon is used as a cover gas when melting metals
is, it is an inert gas. It doesn’t combine chemically with the metal
or anything else. Nitrogen on the other hand is NOT an inert gas &
may combine chemically with the metal being melted producing
undesired characteristics. This is the same reason it’s used with
MIG, TIG, ABI Pulse Arc & PUK welders.

Dave


#3

I don’t think there is a gettering problem, but I can’t back this
statement up.I would stick with pure ARGON there will be no reaction
and You can’t save that much money.

jesse


#4

ADD this to my comments this morning. I don’t really know more than
the Yasui web site info on their system, but don’t use nitrogen in a
hot carbon or graphite containing system. It will make cyanogen in a
nitrogen atmosphere… The reaction is endothermic. I have run into
this twice. once in a carbon filament manufacturing research process
and once in as Thermocouple calibration system. see :
http://en.wikipedia.org/wiki/Cyanogen cyanogen is toxic and the
carbon will be converted.

jesse