The influence of rare earth metals on the structure of some rapidly solidified Ge- and Si-based alloys

Dmitri V. Louzguine, Akihisa Inoue

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Ge-rich amorphous alloys containing up to 70 at % Ge were produced by the optimization of the Al, Cr and RE (RE: Rare earth metals) content. Contrary to the Ge-based alloys, no positive influence of RE additions on the glass forming ability (GFA) of the Si-Al-TM and Si-Al alloys (TM: Transition metals) was found. As no split of the first broad peak is seen in the X-ray diffraction patterns taken from the amorphous phase of the Ge-Al-RE alloys, one can suggest that such a feature observed in the Ge-Al-TM and Ge-Al-TM-RE alloys is affected by the presence of 3d TM. Peritectic-type phase transformation, amorphous phase + unknown crystalline phase 1 → unknown crystalline phase 2, was observed in the Ge60Al25La15 alloy and studied. The metastable crystalline phase 2 (Ge12Al5La3) was found to have a tetragonal lattice with lattice parameters of a = 0.559 nm and c = 0.528 nm.

Original languageEnglish
Pages (from-to)505-509
Number of pages5
JournalMaterials Science and Engineering A
Volume304-306
Issue number1-2
DOIs
Publication statusPublished - 2001 May 31

Keywords

  • Amorphous phase
  • Crystalline structure
  • Ge- and Si-based alloys
  • Phase transformation

ASJC Scopus subject areas

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

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