Production of flaky Ti-based amorphous powder by a two-stage quenching technique and its thermal stability

Nobuyuki Nishiyama, M. Oguchi, A. Inoue, T. Masumoto

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Amorphous Ti-based flaky powders about 2 μm thick were produced in a wide range of particle size from 25 to 150 μm using a two-stage quenching technique consisting of impact flattening supercooled liquid droplets obtained by high-pressure Ar atomization. The flaky powder particles have a smooth surface with a sharp edge and good metallic luster, and their corrosion resistance is much better than that of pure Ti metal and SUS 304. The aspect ratio is as large as 20-300. No appreciable difference in Tg and Tx is found between the flaky powder and melt-spun ribbon, while the heat of structural relaxation for the powder is 2.0-2.9 times as large as that for the ribbon. It is concluded that the flaky amorphous powder is produced at a much higher cooling rate than the ribbon because of the subsequent cooling of the supercooled liquid droplets.

Original languageEnglish
Pages (from-to)697-701
Number of pages5
JournalMaterials Science and Engineering A
Volume179-180
Issue numberPART 1
DOIs
Publication statusPublished - 1994 May 1

ASJC Scopus subject areas

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

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