Evaluation of process behavior and crystallite specifications of mechano-chemically synthesized WC-Al2O3 nano-composites

M. Sh Bafghi, M. Sakaki, J. Vahdati Khaki, Q. Zhang, F. Saito

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

A new route for the synthesis of WC-Al2O3 composite free from unwanted W2C phase through mechano-chemical treatment of WO3-xAl-y(4 - 1.5x)C mixture has been investigated. It has been concluded that by substitution of 10 mol% of 2 mol Al (x = 1.8) with equivalent stoichiometric amount of C together with 20 mol% excess carbon addition (y = 1.2), i.e., using a WO3:1.8Al:1.56C initial mixture, W2C free WC-Al2O3 composite can be successfully obtained by about 6 h milling. Crystallite size and lattice strain of the WC-Al 2O3 composite synthesized in the present study as well as those obtained by the previous successful routes have been reported. The results revealed that a powder whose synthesis route involves lower adiabatic temperature as well as longer milling time would have a smaller crystallite size and higher lattice strain. Furthermore, TEM observations showed that all synthesized powders contain the agglomerates which consist of nano-size particles.

Original languageEnglish
Pages (from-to)160-166
Number of pages7
JournalMaterials Research Bulletin
Volume49
Issue number1
DOIs
Publication statusPublished - 2014 Jan 1

Keywords

  • A. Carbides
  • A. Composites
  • A. Nanostructures
  • C. Electron microscopy
  • C. X-ray diffraction

ASJC Scopus subject areas

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

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