Structural evolution during heat treatment of mechanically alloyed Al-Cu-Fe-(Si) alloys

Ki Buem Kim, Suk Hwan Kim, Won Tae Kim, Do Hyang Kim, Kyung Tae Hong

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Abstract

Structural evolution during mechanical alloying and subsequent heat treatment of Al65Cu20Fe15 and Al65Cu20Fe10Si5 was studied by X-ray diffractometry (XRD), transmission electron microscopy (TEM) and differential scanning calorimetry (DSC). The Al65Cu20Fe15 and Al65Cu20Fe10Si5 powders milled for 10 h showed a layered structure consisting of Al-, Cu- and Fe-rich layers. DSC traces obtained from the powder during heating, up to 600°C, showed two exothermic peaks with peak temperatures of 330 and 440°C in Al65Cu20Fe15 and 330 and 500°C in Al65Cu20Fe10Si5 powders. The lower exothermic peaks correspond to the formation of Al2Cu and Al7Cu2Fe phases from the layered structure. The second high temperature exotherms correspond to the formation of Al(Fe,Cu) and 1/1 cubic approximant in the Al65Cu20Fe15 powder and to the formation of Al13Fe4 adn 1/1 cubic approximant in the Al65Cu20Fe10Si5 powder. The Al65Cu20Fe15 and Al65Cu20Fe10Si5 powders annealed for 5 h at 750°C showed microstructure consisting of Al(Cu,Fe) and Al13Fe4 phases, and Al13Fe4, icosahedral and new approximant phases, respectively. The partial substitution of Fe by Si increased the stability of the 1/1 cubic approximant and icosahedral phases.

Original languageEnglish
Pages (from-to)822-829
Number of pages8
JournalMaterials Science and Engineering A
Volume304-306
Issue number1-2
DOIs
Publication statusPublished - 2001 May 31

Fingerprint

Powders
heat treatment
Heat treatment
Differential scanning calorimetry
heat measurement
scanning
Mechanical alloying
X ray diffraction analysis
alloying
Substitution reactions
substitutes
Transmission electron microscopy
Heating
Temperature
transmission electron microscopy
microstructure
Microstructure
heating
x rays
temperature

All Science Journal Classification (ASJC) codes

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

Cite this

Kim, Ki Buem ; Kim, Suk Hwan ; Kim, Won Tae ; Kim, Do Hyang ; Hong, Kyung Tae. / Structural evolution during heat treatment of mechanically alloyed Al-Cu-Fe-(Si) alloys. In: Materials Science and Engineering A. 2001 ; Vol. 304-306, No. 1-2. pp. 822-829.
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Structural evolution during heat treatment of mechanically alloyed Al-Cu-Fe-(Si) alloys. / Kim, Ki Buem; Kim, Suk Hwan; Kim, Won Tae; Kim, Do Hyang; Hong, Kyung Tae.

In: Materials Science and Engineering A, Vol. 304-306, No. 1-2, 31.05.2001, p. 822-829.

Research output: Contribution to journalArticle

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AU - Kim, Ki Buem

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