moly tap?   you need epoxy filled with silver... my guess.  make sure  
you press down with pressure to make it a good contact upon glue it  
down (silver flakes need to contact each other to form almost ohmic  
contact).
             jk
On Aug 28, 2014, at 9:14 AM, David Hillman wrote:

> Hi Jeff - sorry to be the bearer of bad news but Moly is classified  
> as a
> "refractory" metal which are essentially impossible to get an  
> acceptable
> solder joint. The best information I have in my library is in the AWS
> Soldering Handbook (ISBN 0-87171-618-6) Section 3.3.11. You need a
> intermediate solderable coating such as nickel or copper on the  
> Moly and to
> get that layer adhered you need to clean the Moly surface with some  
> pretty
> nasty etching materials (HF, NaOH) and processes (molten baths,  
> boiling
> baths). Not something to causally try.
>
> Dave Hillman
> Rockwell Collins
> [log in to unmask]
>
>
> On Thu, Aug 28, 2014 at 5:56 AM, McGlaughlin, Jeffrey A <
> [log in to unmask]> wrote:
>
>> Any recommendations or warnings in trying to solder molybdenum  
>> conductors
>> to a circuit card?
>>
>> TIA
>>
>> Jeffrey McGlaughlin, C.I.D.
>> Engineering Designer
>> Avionics Systems & Tech Refersh
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