Fine grain niobium sheet via ingot metallurgy

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

C - Chemistry, Metallurgy

22

C

C22C 1/02 (2006.01) B22D 7/02 (2006.01) B22D 23/06 (2006.01) B22D 25/06 (2006.01) C22C 1/05 (2006.01) C22C 45/10 (2006.01) B21C 37/02 (2006.01)

Patent

CA 2524430

A method of making a silicon-containing alloy of niobium or tantalum that includes: A) forming a blend comprising niobium or tantalum powder and silicon powder and pressing the blend to form pressed blend; B) attaching the pressed blend to an electrode comprising niobium or tantalum; 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; and E) applying thermo-mechanical processing steps to the alloy ingot to form a wrought product. The method provides a fully recrystalized niobium or tantalum 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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