Process for producing formed amorphous bodies with improved, hom

Details Process for producing formed amorphous bodies with improved, hom Process for producing formed amorphous bodies with improved, hom

1986-05-22

1988-08-02

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Powder pretreatment

419 38, 419 48, 419 49, 241 27, 264 15, B22F 100

Patent

active

047612630

ABSTRACT:
Process for producing formed bodies with improved homogeneous properties, high resistance to oxidation and corrosion, great hardness and firmness, good mechanical workability, and high resistance to abrasion, made out of an initial power material which contains two elemental metals; or one or more alloys; or one or more elemental metals and one or more alloys; or a combination of one or more elemental metals and/or one or more alloys with one or more metalloids and/or one or more non-metallic substances, except for formed bodies made of NiTi, of Nb.sub.3 Sn, of stoichiometric, binary intermettalic yttrium-cobalt compounds and gadolinium-cobalt compounds, and of Ni.sub.60 Nb.sub.40, wherein the initial material, in metallic form or in the form of a hard material or a mixture thereof, is ground to a fine pulverized powder in a high-energy ball mill, and in which the fine powder is subsequently shaped into a formed body, comprising: conducting the fine pulverization of the powder in a dry, purified protective gas until it loses practically all of its crystalline properties, as proven by X-ray diffractometry, while employing a temperature during the milling process which is below the temperature at which crystallization first occurs, and employing a temperature, during the subsequent shaping which is below the temperature at which crystallization first occurs.

REFERENCES:
patent: 3832156 (1974-08-01), Wilson et al.
patent: 4298382 (1981-11-01), Stempin et al.
patent: 4381197 (1983-04-01), Liebermann
patent: 4585617 (1986-04-01), Tenhover et al.
Chemical Abstracts, vol. 98, 1983, Abstract No. 98:226654b.
Chemical Abstracts, vol. 98, 1982, Abstract No. 78700e.
Chemical Abstracts, vol. 98, 1983, Abstract No. 98:64311h.
L. Schulz, "Preparation of Thick Amorphous Metals by Jelly Roll Technique and Rapid Diffusion", Amorphous Metals and Nonequilibrium Processing, Jun. 5 to 8, 1984, Strasbourg, France.
Koch et al., Applied Physics Letters, vol. 43 (11) Dec. 1983, pp. 1017-1019.
R. B. Schwarz, "Amorphization of Ni-Ti Alloys by Mechanical Alloying", Fifth International Conference on Rapidly Quenched Metals, Abstracts, Wuerzburg, Sep. 3 to 7, 1984, p. K 71.

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