Comparative analysis of crystallization of Al85RE8Ni5Co2 (RE = Rare-Earth Metals) metallic glasses with and without supercooled liquid region

D. V. Louzguine, A. Inoue

Research output: Contribution to journalConference articlepeer-review

10 Citations (Scopus)

Abstract

The present study is devoted to an effect of a supercooled liquid region on crystallization behaviour of the Al85RE8Ni5Co2 metallic glasses produced by rapid solidification of the melt. The Al85RE8Ni5Co2 amorphous alloys can be divided into two groups depending on whether they show glass-transition on heating or not. Under annealing at the temperature above the glass-transition or under continuous heating at high enough heating rate, most of the Al-RE-Ni-Co glasses exhibiting formation of the supercooled liquid region primarily crystallize by precipitation of the nanoscale α-Al particles, Al-RE-Ni-Co alloys having no glass transition form intermetallic compounds primarily or corporately with α-Al. Amorphous alloys exhibiting no glass-transition crystallize equally at different modes studied. However, crystallization of the Al-RE-Ni-Co metallic glasses below glass-transition temperature follows different transformation mechanism. During isothermal annealing below glass-transition temperature an unknown metastable phase is formed conjointly with α-Al. Although transformation mechanism looks similar to an eutectic one some differences are found.

Original languageEnglish
Pages (from-to)117-122
Number of pages6
JournalMaterials Science Forum
Volume386-388
Publication statusPublished - 2002 Jan 1
EventProceedings of the International Symposium on Metastable, Mechanically Alloyed and Noncrystalline Materials (ISMANAM) - Ann Arbor, MI, United States
Duration: 2001 Jun 242001 Jun 29

Keywords

  • Al alloys
  • Crystallization behavior
  • Metallic glass
  • Supercooled liquid region

ASJC Scopus subject areas

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

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