Precipitation of Stable Icosahedral Phase in Ti-Based Amorphous Alloys

Yu Chan Kim, Jin Man Park, Jin Kyu Lee, Won Tae Kim, Do Hyang Kim

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The crystallization behavior of bulk amorphous Ti-Zr-Be-Cu-Ni alloys has been studied by using differential scanning calorimetry (DSC), X-ray diffractometry (XRD) and transmission electron microscopy (TEM). Detailed thermal analysis showed that Ti-Zr-Be-Cu-Ni amorphous alloys with the wide composition range crystallized through two exothermic reactions followed by one endothermic reaction. At first stage, nanometer scale primary icosahedral phase (I-phase) precipitated from an amorphous matrix and then the remaining amorphous phase crystallized into cubic β-Ti(Zr) phase or hexagonal Laves phase depending on the alloy composition. Finally, I- and β-Ti(Zr) phase or I- and Laves phase mixture transformed into the Laves phase by the high-temperature endothermic reaction, indicating that the I-phase is a thermally stable phase at the lower temperature range. Reversible transformation between the I-phase and Laves phase during cyclic heating and cooling confirmed the thermodynamic stability of the I-phase in Ti-Zr-Be-Cu-Ni system.

Original languageEnglish
Pages (from-to)1978-1981
Number of pages4
JournalMaterials Transactions
Volume44
Issue number10
DOIs
Publication statusPublished - 2003 Jan 1

Fingerprint

Laves phases
Amorphous alloys
endothermic reactions
Exothermic reactions
Crystallization
Chemical analysis
X ray diffraction analysis
Thermoanalysis
exothermic reactions
Differential scanning calorimetry
Thermodynamic stability
Transmission electron microscopy
Cooling
Heating
Temperature
thermal analysis
heat measurement
crystallization
cooling
thermodynamics

All Science Journal Classification (ASJC) codes

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

Cite this

Kim, Yu Chan ; Park, Jin Man ; Lee, Jin Kyu ; Kim, Won Tae ; Kim, Do Hyang. / Precipitation of Stable Icosahedral Phase in Ti-Based Amorphous Alloys. In: Materials Transactions. 2003 ; Vol. 44, No. 10. pp. 1978-1981.
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Precipitation of Stable Icosahedral Phase in Ti-Based Amorphous Alloys. / Kim, Yu Chan; Park, Jin Man; Lee, Jin Kyu; Kim, Won Tae; Kim, Do Hyang.

In: Materials Transactions, Vol. 44, No. 10, 01.01.2003, p. 1978-1981.

Research output: Contribution to journalArticle

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