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Title: Metastable alloy materials produced by solid state reaction of compacted, mechanically deformed mixtures

Abstract

Bulk metastable, amorphous or fine crystalline alloy materials are produced by reacting cold-worked, mechanically deformed filamentary precursors such as metal powder mixtures or intercalated metal foils. Cold-working consolidates the metals, increases the interfacial area, lowers the free energy for reaction, and reduces at least one characteristic dimension of the metals. For example, the grains (13) of powder or the sheets of foil are clad in a container (14) to form a disc (10). The disc (10) is cold-rolled between the nip (16) of rollers (18,20) to form a flattened disc (22). The grains (13) are further elongated by further rolling to form a very thin sheet (26) of a lamellar filamentary structure (FIG. 4) containing filaments having a thickness of less than 0.01 microns. Thus, diffusion distance and time for reaction are substantially reduced when the flattened foil (28) is thermally treated in oven (32) to form a composite sheet (33) containing metastable material (34) dispersed in unreacted polycrystalline material (36).

Inventors:
 [1];  [2];  [3]
  1. Herzlia, IL
  2. Pasadena, CA
  3. Ames, IA
Issue Date:
Research Org.:
California Institute of Technology (CalTech), Pasadena, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
866125
Patent Number(s):
4640816
Assignee:
California Institute of Technology (Pasadena, CA)
Patent Classifications (CPCs):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
DOE Contract Number:  
AT03-81ER10870; AM03-76SF00767
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
metastable; alloy; materials; produced; solid; reaction; compacted; mechanically; deformed; mixtures; bulk; amorphous; fine; crystalline; reacting; cold-worked; filamentary; precursors; metal; powder; intercalated; foils; cold-working; consolidates; metals; increases; interfacial; lowers; free; energy; reduces; characteristic; dimension; example; grains; 13; sheets; foil; clad; container; 14; form; disc; 10; cold-rolled; nip; 16; rollers; 18; 20; flattened; 22; elongated; rolling; sheet; 26; lamellar; structure; fig; containing; filaments; thickness; 01; microns; diffusion; distance; time; substantially; reduced; 28; thermally; treated; oven; 32; composite; 33; material; 34; dispersed; unreacted; polycrystalline; 36; free energy; substantially reduced; crystalline material; metal foil; metal powder; substantially reduce; polycrystalline material; alloy material; powder mixture; stable material; powder mixtures; mechanically deformed; composite sheet; metal foils; metastable alloy; thermally treated; fine crystalline; intercalated metal; alloy materials; containing filaments; /419/29/148/505/

Citation Formats

Atzmon, Michael, Johnson, William L, and Verhoeven, John D. Metastable alloy materials produced by solid state reaction of compacted, mechanically deformed mixtures. United States: N. p., 1987. Web.
Atzmon, Michael, Johnson, William L, & Verhoeven, John D. Metastable alloy materials produced by solid state reaction of compacted, mechanically deformed mixtures. United States.
Atzmon, Michael, Johnson, William L, and Verhoeven, John D. Thu . "Metastable alloy materials produced by solid state reaction of compacted, mechanically deformed mixtures". United States. https://www.osti.gov/servlets/purl/866125.
@article{osti_866125,
title = {Metastable alloy materials produced by solid state reaction of compacted, mechanically deformed mixtures},
author = {Atzmon, Michael and Johnson, William L and Verhoeven, John D},
abstractNote = {Bulk metastable, amorphous or fine crystalline alloy materials are produced by reacting cold-worked, mechanically deformed filamentary precursors such as metal powder mixtures or intercalated metal foils. Cold-working consolidates the metals, increases the interfacial area, lowers the free energy for reaction, and reduces at least one characteristic dimension of the metals. For example, the grains (13) of powder or the sheets of foil are clad in a container (14) to form a disc (10). The disc (10) is cold-rolled between the nip (16) of rollers (18,20) to form a flattened disc (22). The grains (13) are further elongated by further rolling to form a very thin sheet (26) of a lamellar filamentary structure (FIG. 4) containing filaments having a thickness of less than 0.01 microns. Thus, diffusion distance and time for reaction are substantially reduced when the flattened foil (28) is thermally treated in oven (32) to form a composite sheet (33) containing metastable material (34) dispersed in unreacted polycrystalline material (36).},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {1}
}

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