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Subject:
From:
Sylvain Kaufmann <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Sylvain Kaufmann <[log in to unmask]>
Date:
Wed, 23 Feb 2011 07:07:53 +0000
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Dear Technetters,

Thank you very much for all your replies and docs/links. Indeed, during my initial "googling", I missed the ductile to brittle transition words.

For now, I cannot much discuss the other parameters as I did not meet the designer yet. I may come back with some other questions afterwards.

Thanks again for your time.
Kind regards
sylvain

PS: sorry I did not put a subject on my first e-mail, I hit the send button too quickly

--------------------------------------------------------------------
Sylvain Kaufmann
CERN / European Laboratory for Particle Physics
Rte de Meyrin
dpt. TE-MPE-EM
1211 Geneva 23
Tel: +41 22 767 37 02
Fax: +41 22 766 87 77
www.cern.ch
--------------------------------------------------------------------



-----Original Message-----
From: Graham Naisbitt [mailto:[log in to unmask]] 
Sent: 22 February 2011 16:19
To: Sylvain Kaufmann; TechNet Forum
Subject: Re: [TN] Low Temperature Alloys

Hi Silvain

I contacted an old friend at ESA who advised:

Our spacecraft electronics are verified down to -55 degC, but I was involved
with some studies at lower temps, but only our favoured materials and a
Pb-free try:

(See attached file: Cryogenics_48(2008)497-510.pdf)

Fig 13, second block down should read 50InPb not SnPb.

Is this useful?

If anyone would like a copy of this document, let me know off TechNet directly.

Graham N


On 22 Feb 2011, at 10:35, Sylvain Kaufmann wrote:

> Dear Technetters,
> 
> I am looking for some information about solder joints / alloy behavior in extremely low temperature environment; in this particular case, for temperatures below 77K.
> 
> I have not been very lucky so far and could not find any useful data or papers.
> 
> Do any of you have experience with such environment? Any alloy to suggest or to stay away from? Some literature or studies that would be available somewhere?
> 
> Thanks in advance for your help and sharing your thoughts about that cold case.
> 
> Best regards
> sylvain
> 
> --------------------------------------------------------------------
> Sylvain Kaufmann
> CERN / European Laboratory for Particle Physics
> Rte de Meyrin
> dpt. TE-MPE-EM
> 1211 Geneva 23
> Tel: +41 22 767 37 02
> Fax: +41 22 766 87 77
> www.cern.ch
> --------------------------------------------------------------------
> 
> 
> 
> 
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