Video - Making MgB2 Superconductors

MSimon · Post by **MSimon** » Sun May 25, 2008 1:59 pm

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http://www.columbussuperconductors.com/ ... uction.wmv

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Abour 2 minutes / 6 MB

From:

http://www.columbussuperconductors.com/mgb2.htm

Billy Catringer · Post by **Billy Catringer** » Thu Feb 05, 2009 12:30 pm

The video does not show the necessary annealing steps in the process, but they may be annealing on the fly. Both copper and nickel have the nasty habit of work hardening.

KitemanSA · Post by **KitemanSA** » Thu Feb 05, 2009 1:31 pm

Neat video, but this is what American Superconductors calls 1st generation wire. Their 2nd generation wire basically has better properties in all areas.

Of course, AmSC make HTS, (BSCCO, YBCO) not MgB2; though the issues may be the same.

Billy Catringer · Post by **Billy Catringer** » Thu Feb 05, 2009 5:43 pm

If they are using nickel and copper in the new composites, they have to do some annealing along the way during fabrication. I am surprised that they do not offer some of these with silver cores instead of copper.

MSimon · Post by **MSimon** » Thu Feb 05, 2009 7:19 pm

MgB has "metalic" mechanical properties and has good neutron resistance. Its neutron resistance could be increased if it was made with pure B11.

KitemanSA · Post by **KitemanSA** » Thu Feb 05, 2009 7:29 pm

MSimon wrote:...Its neutron resistance could be increased if it was made with pure B11.

?? Shouldn't that be B10 which can absorb a neutron and remain Boron? Admittedly, I am outside my field here.

Billy Catringer · Post by **Billy Catringer** » Thu Feb 05, 2009 7:44 pm

Additional note. Silver is itself a good absorber of neutrons and there are some alloys of it that hold up well in nuclear service.

MSimon · Post by **MSimon** » Thu Feb 05, 2009 8:50 pm

KitemanSA wrote:
MSimon wrote:...Its neutron resistance could be increased if it was made with pure B11.
?? Shouldn't that be B10 which can absorb a neutron and remain Boron? Admittedly, I am outside my field here.

Neutron absorption causes lattice defects. The less the better. Thus B11.