Synthesis of nanostructured tungsten carbide via metal-organic chemical vapor deposition and carburization process

Wei Hsio Chen, Pramoda K. Nayak, Hao Tung Lin, Man Ping Chang, Jow-Lay Huang

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Nanostructured tungsten carbide particles were successfully synthesized by metal-organic chemical vapor deposition in a spouted bed followed by carburization in CH4/H2 atmosphere in the temperature range 700-900 °C. The carburization process was a little bit complex, which involved the coating of carbon on the outer surface of the decomposed W(CO) 6 precursor particles and then followed by carbon diffusion into the particles, leading to the formation of nanostructured WC via an intermediate metastable phase W2C. The carbon deficient phase W2C was formed initially at lower carburization temperature and then transformed to stable WC phase by increasing the temperature and holding time.

Original languageEnglish
Pages (from-to)44-48
Number of pages5
JournalInternational Journal of Refractory Metals and Hard Materials
Volume47
DOIs
Publication statusPublished - 2014 Jan 1

All Science Journal Classification (ASJC) codes

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

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