Consolidation of amorphous Ni-Zr-Ti-Si powders by vacuum hot-pressing method

Pee Yew Lee, Shih Sheng Hung, Jei Te Hsieh, Yu Lom Lin, Chung Kwei Lin

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

In the current study, we investigated the feasibility of fabricating amorphous Ni57Zr20Ti20Si3 powders by mechanical alloying, and consolidating them into bulk metallic glasses by a vacuum hot pressing technique. The as-milled and hot-pressed samples were examined by X-ray diffraction, scanning electron microscope, and differential thermal analysis. According to the results, amorphous Ni57Zr20Ti20Si3 powders were prepared after milling elemental powder mixtures for 5 h. The amorphous powders were found to exhibit a wide supercooled liquid region of 88 K before crystallization. Bulk metallic glasses were prepared successfully by consolidating the as-milled Ni57Zr20Ti20Si3 amorphous powders using vacuum hot pressing in the supercooled liquid region. Vickers microhardnesses of the as-pressed samples are in the range of 788-830 kg/mm2.

Original languageEnglish
Pages (from-to)1277-1282
Number of pages6
JournalIntermetallics
Volume10
Issue number11-12
DOIs
Publication statusPublished - Nov 2002
Externally publishedYes

Keywords

  • C. Mechanical alloying and milling

ASJC Scopus subject areas

  • Chemistry(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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