Method of casting articles of a bulk-solidifying amorphous alloy

Patent · Wed Dec 31 23:00:00 EST 1997

OSTI ID:871793

Lin, Xianghong ^[1]; Johnson, William L ^[2]; Peker, Atakan ^[3]

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1. Laguna Niguel, CA
2. Pasadena, CA
3. Aliso Viejo, CA

A casting charge of a bulk-solidifying amorphous alloy is cast into a mold from a temperature greater than its crystallized melting temperature, and permitted to solidify to form an article. The oxygen content of the casting charge is limited to an operable level, as excessively high oxygen contents produce premature crystallization during the casting operation. During melting, the casting charge is preferably heated to a temperature above a threshold temperature to eliminate heterogeneous crystallization nucleation sites within the casting charge. The casting charge may be cast from above the threshold temperature, or it may be cooled to the casting temperature of more than the crystallized melting point but not more than the threshold temperature, optionally held at this temperature for a period of time, and thereafter cast.

• Research Organization: California Institute of Technology (Pasadena, CA)
• DOE Contract Number: FG03-86ER45242
• Assignee: Amorphous Technologies International (Laguna Niguel, CA); California Institute of Technology (Pasadena, CA)
• Patent Number(s): US 5797443
• OSTI ID: 871793
• Country of Publication: United States
• Language: English

Related Subjects

/164/148/
alloy
amorphous
amorphous alloy
article
articles
bulk-solidifying
bulk-solidifying amorphous
cast
casting
casting operation
charge
content
contents
cooled
crystallization
crystallized
eliminate
excessively
form
heated
held
heterogeneous
level
limited
melting
melting temperature
method
mold
nucleation
nucleation sites
operable
operation
optionally
oxygen
oxygen content
period
permitted
preferably
preferably heated
premature
produce
sites
solidify
temperature
thereafter
threshold
threshold temperature
time