Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 300, Issue 1-2, Pages 312-315Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S0921-5093(00)01474-X
Keywords
magnesium; zinc; yittrium; icosahedral; quasicrystal; composite; microstructure
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Structural applications of monolithic icosahedral phase (I-phase) materials have been limited by the brittleness of I-phases. Composite material design, including a ductile phase, can be a solution for the structural applications of the I-phase materials. Two phase microstructures, including thermodynamically stable I-phase, are studied in the Mg-rich corner of the alloy system Mg-Zn-Y. An (I-phase + alpha -Mg) eutectic microstructure is reported for the first time in the as-cast samples. By controlling thermal processing procedures, a very different (I-phase + alpha -Mg) microstructure from the eutectic microstructure can be developed, expanding the microstructural options available for the structural composite materials, comprising the I-phase and alpha -Mg solid solution. (C) 2001 Elsevier Science B.V. All rights reserved.
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