Microstructure modification and quasicrystalline phase formation in Al-Mn-Si-Be cast alloys

H. J. Chang; E. Fleury; G. S. Song; M. H. Lee; W. T. Kim; D. H. Kim

doi:10.1016/j.msea.2003.10.004

Microstructure modification and quasicrystalline phase formation in Al-Mn-Si-Be cast alloys

H. J. Chang, E. Fleury, G. S. Song, M. H. Lee, W. T. Kim, D. H. Kim

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	992-997
Number of pages	6
Journal	Materials Science and Engineering A
Volume	375-377
Issue number	1-2 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.msea.2003.10.004
Publication status	Published - 2004 Jul

Bibliographical note

Funding Information:
The authors are grateful for the financial support by the Creative Research initiatives of the Korean Ministry of Science and Technology.

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Microstructure modification and quasicrystalline phase formation in Al-Mn-Si-Be cast alloys",

abstract = "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.",

author = "Chang, {H. J.} and E. Fleury and Song, {G. S.} and Lee, {M. H.} and Kim, {W. T.} and Kim, {D. H.}",

note = "Funding Information: The authors are grateful for the financial support by the Creative Research initiatives of the Korean Ministry of Science and Technology. ",

year = "2004",

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doi = "10.1016/j.msea.2003.10.004",

language = "English",

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pages = "992--997",

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AU - Chang, H. J.

AU - Fleury, E.

AU - Song, G. S.

AU - Lee, M. H.

AU - Kim, W. T.

AU - Kim, D. H.

N1 - Funding Information: The authors are grateful for the financial support by the Creative Research initiatives of the Korean Ministry of Science and Technology.

PY - 2004/7

Y1 - 2004/7

N2 - 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.

AB - 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.

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