Microstructure and Mechanical Properties of W-C-B Ceramics Containing VC

• Sugiyama Shigeaki

  Akita Prefectural Research and Development Center

• Taimatsu Hitoshi

  Department of Materials Science and Engineering, Faculty of Engineering and Resource Science, Akita University

Abstract

We prepared WC-based W-C-B ceramics by reactive resistance-heated hot pressing at 1600 to 1800°C from a B₄C-5W-80WC (molar ratio) powder mixture containing a small amount of VC, and examined the effect of VC on sinterability and the mechanical properties of the ceramics. The sintered bodies were composed mainly of WC and small quantities of W₂C, WB, W₂B and VC. Slight amounts of V were detected at the boundaries between WC grains. VC raised the sintering temperature necessary for obtaining dense bodies, and strongly suppressed the growth of WC grains. Young’s modulus for the dense bodies was slightly smaller than that without VC because of the low modulus value of VC. The suppressive effect of VC on the growth of WC grains avoided reducing hardness with increasing sintering temperature.

Journal

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 47 (9), 2353-2357, 2006

  The Japan Institute of Metals and Materials

Keywords

• tungsten carbide
• tungsten boride
• vanadium carbide
• sintering
• hot pressing
• mechanical properties

Details

• CRID: 1390001204250889984
• NII Article ID: 130004453313
• NII Article ID: 10018249229
• NII Book ID: AA1151294X
• DOI: 10.2320/matertrans.47.2353
• ISSN: 13475320
• ISSN: 13459678
• NDL BIB ID: 8062077
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8062077
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/47/9/47_9_2353/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed