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| THPCH163 |
"Oligo-crystalin" Niobium / Large Grain Niobium Discs, Directly Cut from Ingot
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- B. Spaniol
W.C. Heraeus GmbH, Materials Technology Dept., Hanau
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"Oligo-crystalin" Niobium ingots with very large grains (diameter more than 200 mm) can be perfectly used as start material to cut Niobium discs to form half-cells for SCRF cavities. Caused by the minimum of remaining grain boundaries, the properties of these discs are very promising for the use in SCRF cavities. In addition to the technical properties of such material also the cost benefit is promising. The new production way to cut the discs directly from the ingot is less expensive than the "traditional" sheet rolling process. As a positive side effect, the risk of contaminations is minimized due to the reduced number of production steps.
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