Nb-Ti filamant onion blossom superimposed on the Frank Shaw Building, the new home of the Applied Superconductivity Center

NHMFL > ASC > Image Gallery > SC Art > 2D

ArrowSuperconductor Art Gallery: 2d Images Page 1

autumnalmjrnb3snfesem-fc-.jpg

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False color fractograph of OI-ST MJR Nb3Sn filaments. The Nb3Sn grains fracture at their grain boundaries, providing the contrast required to analyze their size and distribution. The remaining unreacted Nb islands (this strand is only partially reacted) are pulled up into ridges by the fracture process. The original FESEM image has been tinted to make it more dramatic. A similar cross-section is shown in the next page but is in the form of a 3-d anaglyph image. Unreacted strand supplied to the UW by Oxford Instruments Inc. - Superconducting Technology, Carteret, NJ.

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False color fractograph of SMI PIT Nb3Sn A15 layer. FESEM image colored for effect (a rejected image for the annual ASC Holiday/New Year card). Unreacted strand supplied to the UW by Shapemetal Innovation B. V., Enschede, The Netherlands.

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False color image of filaments in polished cross-section of Furukawa ITER Nb3Sn strand. Note the exceptional uniformity and the barely discernable extra spacing between the original bundles of 19 filaments.
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Another false color variant on the Furukawa ITER strand. The unreacted Nb cores (green) are more visible here. FESEM image.

     
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False color images of Nb3Sn filament extracted for IGC-AS ITER strand. FESEM image. The filament as approximately 1/25 the thickness of a sheet of paper.

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13 µm diameter NbTiTa filaments etched out of IGC-AS Nb-Ti-Ta strand for FNAL-LHC IR Quads. FESEM.
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Montage showing design of IGC-AS high J<sub>c</sub> (critical current density) internal Sn strand. Heat treated strand supplied to the UW by IGC-Advanced Superconductors, Waterbury, CT.
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Deep etch of IGC-AS internal Sn strand (Cu removed by etch).
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False color FESEM image of deep-etch IGC-AS Nb3Sn strand.
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A windows background image showing Nb3Sn filaments exposed by deep Cu etch.

All the ASC source photographs on this website are copyrighted and may not be used without the express permission of the © holders.

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