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Castable high-temperature Ce-modified Al alloys

Patent ·
OSTI ID:1440532
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A cast alloy includes aluminum and from about 5 to about 30 weight percent of at least one material selected from the group consisting of cerium, lanthanum, and mischmetal. The cast alloy has a strengthening Al11X3 intermetallic phase in an amount in the range of from about 5 to about 30 weight percent, wherein X is at least one of cerium, lanthanum, and mischmetal. The Al11X3 intermetallic phase has a microstructure that includes at least one of lath features and rod morphological features. The morphological features have an average thickness of no more than 700 um and an average spacing of no more than 10 um, the microstructure further comprising an eutectic microconstituent that comprises more than about 10 volume percent of the microstructure.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-00OR22725; AC02-07CH11358; AC52-07NA27344
Assignee:
UT-Battelle, LLC (Oak Ridge, TN)
Patent Number(s):
9,963,770
Application Number:
15/204,169
OSTI ID:
1440532
Country of Publication:
United States
Language:
English

References (3)

Influence of cerium additions on the corrosion behaviour of high pressure die cast AM50 alloy journal December 2012
Reassessment of Al-Ce and Al-Nd binary systems supported by critical experiments and first-principles energy calculations journal December 2005
Effect of substituting cerium-rich mischmetal with lanthanum on microstructure and mechanical properties of die-cast Mg–Al–RE alloys journal August 2009

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36 MATERIALS SCIENCE