Formation of quasicrystalline phases in Al-rich Al-Mn-Be alloys

H. J. Chang, E. Fleury, G. S. Song, W. T. Kim, Do Hyang Kim

Research output: Contribution to journalConference article

15 Citations (Scopus)

Abstract

The effect of Be addition on the formation of quasicrystalline phases in Al-rich Al-Mn(-Be) alloys has been investigated. A metastable icosahedral quasicrystalline phase was found to form in a 93.5Al-5Mn-1.5Be (in wt%) alloy prepared by a conventional casting technique, indicating that the addition of Be to Al-Mn alloys improves the quasicrystal forming ability. The icosahedral phase in conventionally cast Al-Mn-Be alloys forms in the undercooled melt with the equilibrium growth morphology of the pentagonal dodecahedron. Heat treatment at 540 °C for 100 h results in the precipitation of small platelets of a two-dimensional quasiperiodic phase in the α-Al matrix. These precipitates have an orientation relationship with the α-Al matrix.

Original languageEnglish
Pages (from-to)12-16
Number of pages5
JournalJournal of Non-Crystalline Solids
Volume334-335
DOIs
Publication statusPublished - 2004 Mar 15
Event8th International Conference on Quasicrystals - Bangalore, India
Duration: 2002 Sep 82002 Sep 13

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Quasicrystals
matrices
Platelets
platelets
casts
Precipitates
precipitates
Casting
heat treatment
Heat treatment

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

Cite this

Chang, H. J. ; Fleury, E. ; Song, G. S. ; Kim, W. T. ; Kim, Do Hyang. / Formation of quasicrystalline phases in Al-rich Al-Mn-Be alloys. In: Journal of Non-Crystalline Solids. 2004 ; Vol. 334-335. pp. 12-16.
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Formation of quasicrystalline phases in Al-rich Al-Mn-Be alloys. / Chang, H. J.; Fleury, E.; Song, G. S.; Kim, W. T.; Kim, Do Hyang.

In: Journal of Non-Crystalline Solids, Vol. 334-335, 15.03.2004, p. 12-16.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Formation of quasicrystalline phases in Al-rich Al-Mn-Be alloys

AU - Chang, H. J.

AU - Fleury, E.

AU - Song, G. S.

AU - Kim, W. T.

AU - Kim, Do Hyang

PY - 2004/3/15

Y1 - 2004/3/15

N2 - The effect of Be addition on the formation of quasicrystalline phases in Al-rich Al-Mn(-Be) alloys has been investigated. A metastable icosahedral quasicrystalline phase was found to form in a 93.5Al-5Mn-1.5Be (in wt%) alloy prepared by a conventional casting technique, indicating that the addition of Be to Al-Mn alloys improves the quasicrystal forming ability. The icosahedral phase in conventionally cast Al-Mn-Be alloys forms in the undercooled melt with the equilibrium growth morphology of the pentagonal dodecahedron. Heat treatment at 540 °C for 100 h results in the precipitation of small platelets of a two-dimensional quasiperiodic phase in the α-Al matrix. These precipitates have an orientation relationship with the α-Al matrix.

AB - The effect of Be addition on the formation of quasicrystalline phases in Al-rich Al-Mn(-Be) alloys has been investigated. A metastable icosahedral quasicrystalline phase was found to form in a 93.5Al-5Mn-1.5Be (in wt%) alloy prepared by a conventional casting technique, indicating that the addition of Be to Al-Mn alloys improves the quasicrystal forming ability. The icosahedral phase in conventionally cast Al-Mn-Be alloys forms in the undercooled melt with the equilibrium growth morphology of the pentagonal dodecahedron. Heat treatment at 540 °C for 100 h results in the precipitation of small platelets of a two-dimensional quasiperiodic phase in the α-Al matrix. These precipitates have an orientation relationship with the α-Al matrix.

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JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

SN - 0022-3093

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