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, Do Hyang Kim

Research output: Contribution to journalArticle

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 languageEnglish
Pages (from-to)992-997
Number of pages6
JournalMaterials Science and Engineering A
Volume375-377
Issue number1-2 SPEC. ISS.
DOIs
Publication statusPublished - 2004 Jul 1

Fingerprint

cast alloys
Quasicrystals
microstructure
Microstructure
Rapid quenching
Metastable phases
casts
Casting
Cooling
cooling
symmetry
Chemical analysis
Temperature

All Science Journal Classification (ASJC) codes

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

Cite this

Chang, H. J. ; Fleury, E. ; Song, G. S. ; Lee, M. H. ; Kim, W. T. ; Kim, Do Hyang. / Microstructure modification and quasicrystalline phase formation in Al-Mn-Si-Be cast alloys. In: Materials Science and Engineering A. 2004 ; Vol. 375-377, No. 1-2 SPEC. ISS. pp. 992-997.
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Microstructure modification and quasicrystalline phase formation in Al-Mn-Si-Be cast alloys. / Chang, H. J.; Fleury, E.; Song, G. S.; Lee, M. H.; Kim, W. T.; Kim, Do Hyang.

In: Materials Science and Engineering A, Vol. 375-377, No. 1-2 SPEC. ISS., 01.07.2004, p. 992-997.

Research output: Contribution to journalArticle

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AU - Fleury, E.

AU - Song, G. S.

AU - Lee, M. H.

AU - Kim, W. T.

AU - Kim, Do Hyang

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