Sintering of molybdenum metal powder using microwave energy

P. Chhillar, D. Agrawal, J. H. Adair

Research output: Contribution to journalArticle

36 Scopus citations

Abstract

Molybdenum is a refractory metal used for high temperature applications. Sintered molybdenum (Mo) with fine microstructures is desired due to its improved mechanical properties. However, the sintering of Mo is not easily achievable by conventional processes. In this work, the author report the results of sintering molybdenum powder to obtain submicron grain size microstructure using microwave energy. As received Mo powder was agglomerated with a mean agglomerate size of 1.6 μm, but equivalent surface area based on N2 adsorption suggests an average particle size of 200 nm. Sintering was carried out using the as received powder. Samples with densities as high as 98% of theoretical density (TD) were obtained with limited grain growth in <5 min of sintering time in microwaves, compared to 10-20 h in a conventional process. The highlight of this research is achieving 98%TD in 1 min at 1650°C with a submicron grain size.

Original languageEnglish (US)
Pages (from-to)182-187
Number of pages6
JournalPowder Metallurgy
Volume51
Issue number2
DOIs
StatePublished - Aug 22 2008

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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