Electronics Forum | Fri Jan 30 00:41:04 EST 2015 | neeraj_iiser
Thanks a lot , my application is cryogenic in nature. I am trying to make a Sub-Angstrom resolution Thermal expansion sensor, whose components have been machined out of OHFC copper, and i needed to solder a manganin wire to one of the capcitor plates
Electronics Forum | Wed Nov 02 03:35:09 EST 2005 | Slaine
I thought it was the tin content that leached the copper so presumed 100Sn would be more aggressive?
Electronics Forum | Thu Nov 03 04:31:21 EST 2005 | arnold
davef, how can you convince me that 100Sn dissolved copper much faster?
Electronics Forum | Thu Nov 03 07:22:16 EST 2005 | davef
arnold: I did not say that Sn100 dissolved copper faster. The graph of dissolution rates [from the link above] shows that Sn100 dissolves copper slower than many of the other solders.
Electronics Forum | Thu Nov 03 13:35:46 EST 2005 | Amol
the copper forms intermetallics with tin to get Cu3Sn and Cu6Sn5. thus intermetallics formation consumes Cu and depends upon the cooling rate, faster the cooling rate, lesser the intermetallic formation
Electronics Forum | Mon Jan 19 22:59:52 EST 2015 | mac5
Carl, You can use a high temp solder to connect your T/C's but we use Kapton or glass tape so the T/C's can be reused. Mac
Electronics Forum | Mon Jan 19 23:18:56 EST 2015 | cspasol
Thank you mac. May I know what t/C's your using? Do you have any recommended High temp solder that we can buy? We already use Kapton, but it affects the curved on our profile data.
Electronics Forum | Tue Jan 20 22:28:14 EST 2015 | mac5
Carl, Try this link http://www.smtnet.com/Forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=6929&#Message27727 Or search 'thermocouple attach' in the forum Good luck, Mac
Electronics Forum | Thu Jan 29 09:18:36 EST 2015 | davef
Nichrome, manganin, phosphor bronze etc are easy to solder ... the hard part is removing the corrosion * Manganin: 86% copper, 12% manganese, 2% nickel. Often, it's used in making cryogenic measurements, due to its low heat loss. * Select a flux for
Electronics Forum | Wed Nov 02 22:06:54 EST 2005 | davef
Slaine, our intuition is the same as yours [that 100Sn should dissolve the copper faster than other solders]. Bob Gilbert's FCT data shows otherwise. Look here: http://www.fctassembly.com/newsltr/2004/0804/Aug04.htm
