Quasicrystal-forming ability of the icosahedral phase in Al-Cu-Fe-Be alloys

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

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The effect of Be (beryllium) addition and the influence of cooling rate on the solidification path of the icosahedral (i) phase in conventional casting Al62-xBexCu25.5Fe12.5 (x=0,1,3,5,7 at.%) alloys were investigated by means of X-ray diffraction, differential thermal analysis, SEM and EDX analyses. The addition of Be has been found to modify the i-phase formation mechanism from peritectic reaction to primary solidification. The volume fraction of the i-phase has been observed to increase from 45% for x=0 to 90% for x=7. These results suggested that the substitution of Al by Be is favorable for the increase of the quasicrystal-forming ability (QFA) of the i-phase. Two parameters have been proposed for defining and assessing the QFA for i-phase formed by peritectic reaction. These parameters can be expressed by the reduced quasicrystal transition temperature Trq=Tp/Tl and the reduced undercooling ΔTr=ΔTlp/Tl, respectively, (Tl: Liquidus temperature, Tp: Peritectic peak temperature, and ΔTlp=Tl - Tp: Freezing range of primary phase).

Original languageEnglish
Pages (from-to)42-49
Number of pages8
JournalMaterials Science and Engineering A
Volume346
Issue number1-2
DOIs
Publication statusPublished - 2003 Apr 15

Fingerprint

beryllium alloys
Beryllium alloys
Beryllium
Quasicrystals
beryllium
solidification
Solidification
Undercooling
liquidus
supercooling
Freezing
Differential thermal analysis
freezing
Superconducting transition temperature
Energy dispersive spectroscopy
Volume fraction
Casting
thermal analysis
Substitution reactions
transition temperature

All Science Journal Classification (ASJC) codes

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

Cite this

Song, G. S. ; Fleury, E. ; Lee, S. M. ; Kim, W. T. ; Kim, D. H. / Quasicrystal-forming ability of the icosahedral phase in Al-Cu-Fe-Be alloys. In: Materials Science and Engineering A. 2003 ; Vol. 346, No. 1-2. pp. 42-49.
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Quasicrystal-forming ability of the icosahedral phase in Al-Cu-Fe-Be alloys. / Song, G. S.; Fleury, E.; Lee, S. M.; Kim, W. T.; Kim, D. H.

In: Materials Science and Engineering A, Vol. 346, No. 1-2, 15.04.2003, p. 42-49.

Research output: Contribution to journalArticle

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AU - Kim, D. H.

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