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Title: Alloy and method of producing the same

Abstract

In accordance with a preferred embodiment of the invention, an alloy or other composite material is provided formed of a bulk metallic glass matrix with a microstructure of crystalline metal particles. The alloy preferably has a composition of (X.sub.a Ni.sub.b Cu.sub.c).sub.100-d-c Y.sub.d Al.sub.c, wherein the sum of a, b and c equals 100, wherein 40.ltoreq.a.ltoreq.80, 0.ltoreq.b.ltoreq.35, 0.ltoreq.c.ltoreq.40, 4.ltoreq.d.ltoreq.30, and 0.ltoreq.e.ltoreq.20, and wherein preferably X is composed of an early transition metal and preferably Y is composed of a refractory body-centered cubic early transition metal. A preferred embodiment of the invention also provides a method of producing an alloy composed of two or more phases at ambient temperature. The method includes the steps of providing a metastable crystalline phase composed of at least two elements, heating the metastable crystalline phase together with at least one additional element to form a liquid, casting the liquid, and cooling the liquid to form the alloy. In accordance with a preferred embodiment of the invention, the composition and cooling rate of the liquid can be controlled to determine the volume fraction of the crystalline phase and determine the size of the crystalline particles, respectively.

Inventors:
; ; ;
Issue Date:
Research Org.:
Johns Hopkins University, Baltimore, MD (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1175429
Patent Number(s):
6918973
Application Number:
10/287,627
Assignee:
Johns Hopkins University (Baltimore, MD)
Patent Classifications (CPCs):
C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS
DOE Contract Number:  
FG02-98ER45699
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Hufnagel, Todd C., Ott, Ryan T., Fan, Cang, and Kecskes, Laszlo. Alloy and method of producing the same. United States: N. p., 2005. Web.
Hufnagel, Todd C., Ott, Ryan T., Fan, Cang, & Kecskes, Laszlo. Alloy and method of producing the same. United States.
Hufnagel, Todd C., Ott, Ryan T., Fan, Cang, and Kecskes, Laszlo. Tue . "Alloy and method of producing the same". United States. https://www.osti.gov/servlets/purl/1175429.
@article{osti_1175429,
title = {Alloy and method of producing the same},
author = {Hufnagel, Todd C. and Ott, Ryan T. and Fan, Cang and Kecskes, Laszlo},
abstractNote = {In accordance with a preferred embodiment of the invention, an alloy or other composite material is provided formed of a bulk metallic glass matrix with a microstructure of crystalline metal particles. The alloy preferably has a composition of (X.sub.a Ni.sub.b Cu.sub.c).sub.100-d-c Y.sub.d Al.sub.c, wherein the sum of a, b and c equals 100, wherein 40.ltoreq.a.ltoreq.80, 0.ltoreq.b.ltoreq.35, 0.ltoreq.c.ltoreq.40, 4.ltoreq.d.ltoreq.30, and 0.ltoreq.e.ltoreq.20, and wherein preferably X is composed of an early transition metal and preferably Y is composed of a refractory body-centered cubic early transition metal. A preferred embodiment of the invention also provides a method of producing an alloy composed of two or more phases at ambient temperature. The method includes the steps of providing a metastable crystalline phase composed of at least two elements, heating the metastable crystalline phase together with at least one additional element to form a liquid, casting the liquid, and cooling the liquid to form the alloy. In accordance with a preferred embodiment of the invention, the composition and cooling rate of the liquid can be controlled to determine the volume fraction of the crystalline phase and determine the size of the crystalline particles, respectively.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2005},
month = {7}
}

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Works referenced in this record:

Deformation behavior of Zr-based bulk nanocrystalline amorphous alloys
journal, February 2000


ZrNbCuNiAl bulk metallic glass matrix composites containing dendritic bcc phase precipitates
journal, April 2002


Ductility of bulk nanocrystalline composites and metallic glasses at room temperature
journal, July 2000


Icosahedral quasicrystalline phase formation in Zr-Al-Ni-Cu glassy alloys by addition of Nb, Ta and V elements
journal, January 2001