Method for producing amorphous based metals

Details Method for producing amorphous based metals Method for producing amorphous based metals

1996-04-12

1998-07-07

Wyszomierski, George

Metal treatment

Process of modifying or maintaining internal physical...

Carburizing or nitriding using externally supplied carbon or...

148238, 148281, 148284, 148561, 75363, 75369, 423 53, 423 61, C22B 3430

Patent

active

057762643

ABSTRACT:
Amorphous tungsten, cobalt, nickel, molybdenum, iron and alloys thereof can be formed by reducing metal-containing compositions to form the elemental metal wherein the particle size of the elemental metal is less than about 80 microns. This is oxidized in an oxygen-starved environment containing less than 3% oxygen and an inert gas to slowly oxidize the elemental metal. By oxidizing the metal under these conditions, the normal exotherm occurring during oxidation is avoided. The slow oxidation of the metal continues forming an amorphous metal oxide. The amorphous metal oxide can then be reacted in a reducing environment such as hydrogen to form the amorphous elemental metal. This amorphous elemental metal can then be reacted with a carburizing gas to form the carbide or ammonia gas to form the nitride or hexamethylsilane to form the silicide. This permits gas/solid reactions. The amorphous metal can also be used in a variety of different applications.

REFERENCES:
patent: 4115526 (1978-09-01), Auborn et al.
patent: 5330557 (1994-07-01), May
patent: 5580397 (1996-12-01), Meyer et al.
Formation and Alloying of Nanostructured B-W Powders, N.C. Angastiniotis, B. H. Kear, L.E. McCandlish, K.V. Ramanujachary, M. Greenblatt, Nanostruct. Mat., 1, 293 (1992).
Chemical Processing and Properties of Nanostructured W-Base Materials, B.H. Kear, L.E. McCandlish, SAMPE Quarterly, (1993).

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