Chang, HJ Fleury, E Song, GS Lee, MH Kim, WT Kim, DH 2024-01-21T06:40:38Z 2024-01-21T06:40:38Z 2021-09-01 2004-07-15 0921-5093 https://pubs.kist.re.kr/handle/201004/137404 In this paper, we report the formation of the new quaternary icosahedral quasicrystal in the Al-Mn-Si-Be system, which has a primitive icosahedral structure and has a significant lower cooling rate at the time of its formation. The icosahedral quasicrystalline phase was found to form in the Al-rich composition of Al-Mn-Si-Be alloy by conventional casting technique as well as by rapid quenching technique, indicating that the addition of Be to Al-Mn-Si alloys improves the quasicrystal forming ability. The icosahedral phase in conventionally cast Al-Mn-Si-Be alloys forms as a dendritic phase in the under-cooled melt showing five well-developed branches indicating the five-fold symmetry structure. At the later stage of the growth of the icosahedral phase, 1/1 approximant phase forms heterogeneously from the icosahedral phase. The Al-Mn-Si-Be icosahedral phase is metastable, and transforms into the 1/1 cubic approximant phase at high temperature. (C) 2003 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE SA HEXAGONAL APPROXIMANT PHASES SYSTEM Microstructure modification and quasicrystalline phase formation in Al-Mn-Si-Be cast alloys Article 10.1016/j.msea.2003.10.004 1 MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v.375, pp.992 - 997 MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 375 992 997 scie scopus 000223329700191 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Science & Technology - Other Topics Materials Science Metallurgy & Metallurgical Engineering Article; Proceedings Paper HEXAGONAL APPROXIMANT PHASES SYSTEM Al-Mn-Si-Be icosahedral phase approximant phase slow cooling