Journal
ACTA MATERIALIA
Volume 53, Issue 6, Pages 1631-1641Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2004.12.013
Keywords
functionally graded materials; centrifugal in situ method; centrifugal force; intermetallic compound; particle size
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To discuss the formation mechanism of the graded composition during the centrifugal in situ method, a detailed study of microstructures in the Al-Al2Cu FGMs fabricated by the centrifugal in situ method from various initial master ingots was carried out. It was found that FGMs can be fabricated by the centrifugal in situ method from not only hypoeutectic or hypereutectic alloys but also eutectic alloys. The particle sizes of the Al2Cu and Al primary crystals were dependent upon their locations in the ring thickness. Using the above experimental results, it has been concluded that the graded structure appearing in the eutectic specimen must be caused by the difference in the densities between Al and Cu in liquid state. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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