Nb-Ti Image Gallery

Schematic

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SSC prototype strand cross-section superimposed on detail 990x560
169KB - JPEG
SSC prototype strand cross-section superimposed on detail (IGC strand).
SSC prototype strand cross-section (OST strand) 530x530
105KB - GIF
SSC prototype strand cross-section (OST strand).
A high critical current density microstructure in a conventionally processed Nb-Ti microstructure 873x600
142KB - JPEG
A high critical current density microstructure in a conventionally processed Nb-Ti microstructure (UW strand).
Hc2 Surfaces for Nb-Ti-Ta at 2 K and 4.2 K. 950x629
142KB - JPEG
Hc2 Surfaces for Nb-Ti-Ta at 2 K and 4.2 K.
SSC prototype strand cross-section pdf189KB - PDF The development of a high critical current density microstructure in a conventionally processed Nb-Ti microstructure.
The assembly of a high critical current density conventionally processed Nb-Ti composite. pdf129KB - PDF
112KB - JPEG
The assembly of a high critical current density conventionally processed Nb-Ti composite.
A comparison of a high critical current density microstructure in a conventionally processed Nb-Ti strand pdf342KB - PDF
66KB - JPEG
A comparison of a high critical current density microstructure in a conventionally processed Nb-Ti strand, with the equilibrium fluxoid spacing at 5 T, 4.2 K.
A comparison of a high critical current density microstructure in a Nb-Ti/Nb APC strand pdf400KB - PDF A comparison of a high critical current density microstructure in a Nb-Ti/Nb APC strand, with the equilibrium fluxoid spacing at 5 T, 4.2 K.

2D Images

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Nb-TI: 13 µm diameter NbTiTa filaments etched out of IGC-AS Nb-Ti-Ta strand for FNAL-LHC IR Quads. 2024x1485 - 679KB
1024x752 - 97KB
13 µm diameter NbTiTa filaments etched out of IGC-AS Nb-Ti-Ta strand for FNAL-LHC IR Quads. FESEM.
Nb-Ti: CERN Nb-Ti Reference Strand for the LHC project. 1280x807 - 453KB CERN Nb-Ti Reference Strand for the LHC project. This strand has over 6000 Nb-47Ti filaments.
Nb-Ti: Strand for the SSC manufactured by IGC-AS. 1258x782 - 613KB
1024x638 - 192KB
Strand for the SSC manufactured by IGC-AS.
Nb-Ti: Light microscope montage for SSC Nb-Ti strand manufactured by IGC-AS. 1258x782 - 676KB
1024x638 - 196KB
Light microscope montage for SSC Nb-Ti strand manufactured by IGC-AS.
Nb-Ti: Another SSC Nb-Ti strand (IGC-AS) variant, this time with more filament detail. 1533x1023 - 2.5MB
1024x684 - 302KB
Another SSC Nb-Ti strand (IGC-AS) variant, this time with more filament detail.
Nb-Ti: APC type Nb-Ti strand with Ta pins produced by Osuke Miura 568x455 - 66KB
568x455 - 20KB
APC type Nb-Ti strand with Ta pins produced by Osuke Miura, Department of Electrical Engineering, Tokyo Metropolitan University 1-1, Minami-osawa Hachioji 192-0397, JAPAN. This is a polished transverse cross-section imaged by FESEM. The Ta pins proved to be less uniform than other examined by Miura but they look very fanciful - which is why they are here!
Nb-Ti: Light microscope image of NRC Nb-Ti ingot cross-section that has been given a composition sensitive etch. 2037x781 - 467KB
1024x391 - 80KB
Light microscope image of NRC Nb-Ti ingot cross-section that has been given a composition sensitive etch. Compositional uniformity is critical for the success of Nb-Ti superconductors.
Nb-Ti: Polarized light micrograph of Nb-Ti-Fe alloy used for an OI-ST strand in the FNAL-LHC IR Quad program. 1128x860 - 588KB
1010x767 - 160KB
Polarized light micrograph of Nb-Ti-Fe alloy used for an OI-ST strand in the FNAL-LHC IR Quad program. Both the specimen surface and the objective have been tilted to enhance the topographical contrast from a composition sensitive etch.
Nb-Ti: High resolution electron backscatter 1650x1258 - 579KB
1008x768 - 93KB
High resolution electron backscatter of this partially heat treated Nb-Ti strand shows both alpha-Ti precipitation (black) and Ti depletion (white) near grain boundaries. There is a large range of precipitate size here (which is not good).
Nb-Ti: False coloredelectronn backscatter image of Nb-Ti strand cross-section. 1024x691 - 989KB
1024x691 - 227KB
False coloredelectronn backscatter image of Nb-Ti strand cross-section. This strand produced at Kharkov uses very long heat treatments (400 hrs) and low temperatures (350 °C) to produce large volumes of fine scale alpha titanium (green). Note the exceptional uniformity of the precipitation.

3D Images

These image are vieweable in 3D using traditional red-blue glasses (typical of glasses used for 1950s horror movies).

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Nb-Ti: 3d (blue-green anaglyph) deep-deep-etch exposing Nb-Ti filaments 1418x1938 - 1.6MB - JPG
1418x1938 - 7.2MB - TIF
3d (red-blue anaglyph) deep-deep-etch exposing Nb-Ti filaments in high performance strand. This image shows Nb-Ti filaments exposed by etching away the Cu stabiliser from a multifilamentary Nb-Ti/Cu strand manufactured by IGC-AS. This strand is a high Fe, high Jc prototype strand produced as part of the FNAL-UW developmental work for the LHC-IR Quad superconducting accelerator magnets. Strand supplied to the UW by IGC-AS under contract with Fermilab.
Nb-Ti: 3d (blue-green anaglyph) deep-etch cross section of Nb-Ti strand 1398x2130 - 757KB
672x1024 - 361KB
3d (red-blue anaglyph) deep-etch cross section of Nb-Ti strand. This image shows a partial transverse cross-section of a multifilamentary Nb-Ti/Cu strand manufactured by IGC-AS. This strand is a high Fe, high Jc prototype strand produced as part of the FNAL-UW developmental work for the LHC-IR Quad superconducting accelerator magnets. Strand supplied to the UW by IGC-AS under contract with Fermilab.
Last modified on 17 June 2015