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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 of powder or the sheets of foil are clad in a container to form a disc. The disc is cold-rolled between the nip of rollers to form a flattened disc. The grains are further elongated by further rolling to form a very thin sheet of a lamellar filamentary structure 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 is thermally treated in oven to form a composite sheet containing metastable material dispersed in unreacted polycrystalline material. 4 figs.

Inventors:
; ;
Issue Date:
Research Org.:
California Institute of Technology
Sponsoring Org.:
USDOE
OSTI Identifier:
7007692
Patent Number(s):
4640816 A
Application Number:
PPN: US 6-645847
Assignee:
California Institute of Technology (Pasadena, CA) OAK; EDB-94-123852
DOE Contract Number:  
AT03-81ER10870; AM03-76SF00767
Resource Type:
Patent
Resource Relation:
Patent File Date: 31 Aug 1984
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALLOYS; FABRICATION; AMORPHOUS STATE; COMPACTING; MORPHOLOGY; 360101* - Metals & Alloys- Preparation & Fabrication

Citation Formats

Atzmon, M., Johnson, W.L., and Verhoeven, J.D. Metastable alloy materials produced by solid state reaction of compacted, mechanically deformed mixtures. United States: N. p., 1987. Web.
Atzmon, M., Johnson, W.L., & Verhoeven, J.D. Metastable alloy materials produced by solid state reaction of compacted, mechanically deformed mixtures. United States.
Atzmon, M., Johnson, W.L., and Verhoeven, J.D. Tue . "Metastable alloy materials produced by solid state reaction of compacted, mechanically deformed mixtures". United States.
@article{osti_7007692,
title = {Metastable alloy materials produced by solid state reaction of compacted, mechanically deformed mixtures},
author = {Atzmon, M. and Johnson, W.L. and Verhoeven, J.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 of powder or the sheets of foil are clad in a container to form a disc. The disc is cold-rolled between the nip of rollers to form a flattened disc. The grains are further elongated by further rolling to form a very thin sheet of a lamellar filamentary structure 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 is thermally treated in oven to form a composite sheet containing metastable material dispersed in unreacted polycrystalline material. 4 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {2}
}