Microstructure and properties of melt-spun Si-Al-Ge-transition metal amorphous alloys containing nanocrystalline Ge particles

Dmitri V. Louzguine, Akihisa Inoue

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

The effect of Ge addition on the microstructure and some properties was examined for rapidly solidified Si-Al-TM alloys. In particular, the addition of Ge to Si55Al20Fe10Ni5Cr5Zr 5 alloy causes a change to a mixed structure in which fine Ge solid solution particles are dispersed homogeneously in an amorphous matrix. The size, volume fraction and composition of the particles depend on Ge concentration in the alloy. Fine particles, with a size less than 10 nm, were obtained in the range from 5 to 10 at% Ge. These alloys are characterized by high values of hardness (935-1085 Hv) and electrical resistivity (11.0-12.6 μΩm). Owing to the change in the matrix composition, the crystallization temperature increases with increasing Ge content and the highest value reaches 767 K. The exclusion of Ge from the amorphous phase resulted from the complicate interaction between constituent elements.

Original languageEnglish
Pages (from-to)245-251
Number of pages7
JournalMaterials Transactions, JIM
Volume39
Issue number2
DOIs
Publication statusPublished - 1998 Feb

Keywords

  • Crystallization behaviour
  • Germanium particles
  • Multicomponent crystalline phase
  • Rapidly solidified phase
  • Silicon-based amorphous alloy

ASJC Scopus subject areas

  • Engineering(all)

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