Fine grain niobium sheet via ingot metallurgy

Details Fine grain niobium sheet via ingot metallurgy Fine grain niobium sheet via ingot metallurgy

2004-10-27

2010-02-23

King, Roy (Department: 1793)

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

Reexamination Certificate

active

07666243

ABSTRACT:
A method of making a silicon-containing alloy of niobium that includes:A) forming a blend comprising niobium powder and silicon powder and pressing the blend to form pressed blend;B) attaching the pressed blend to an electrode comprising niobium;C) melting the electrode and pressed blend under vacuum arc remelting conditions, such that the blend mixes with the melted electrode;D) cooling the melted electrode to form an alloy ingot; andE) applying thermo-mechanical processing steps to the alloy ingot to form a wrought product.The method provides a fully recrystalized niobium wrought product with a grain size finer that ASTM 5, that can be used to make deep drawn cups and sputtering targets.

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