Thermal-mechanical process in producing high dispersed tungsten-copper composite powder

Yunping Li, Shu Yu

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

In this study, the reduction mechanism of tungsten-copper oxide precursors WO3, CuWO4 as well as the mixtures of these two components were analyzed in detail by TGA-DTA, SEM as well as particle size distribution, etc. The results showed that after milling for the oxide precursors in alcohol the reduced tungsten-copper composite powder showed better particle size distributions than the other two processes of dry milling and water milling. Surface modification by nitrogen showed to be effective in the anti-oxidation of the newly reduced powder because the absorption of nitrogen in the particle surface inhibits further oxidation. The final sintered parts of the reduced powder at 1200 °C and 60 min showed to have an extremely high relative density than the traditional process.

Original languageEnglish
Pages (from-to)540-548
Number of pages9
JournalInternational Journal of Refractory Metals and Hard Materials
Volume26
Issue number6
DOIs
Publication statusPublished - 2008 Nov 1

Keywords

  • BET specific area
  • Particle size distribution
  • Reduction
  • Thermal-mechanical process
  • Tungsten-copper

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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