Application of High-Pressure Torsion to WC–Co Ceramic-Based Composites for Improvement of Consolidation, Microstructure and Hardness

• Edalati Kaveh

  WPI, International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University Department of Materials Science and Engineering, Faculty of Engineering, Kyushu University

• Iwaoka Hideaki

  WPI, International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University Department of Materials Science and Engineering, Faculty of Engineering, Kyushu University

• Toh Shoichi

  Department of Physics, Faculty of Science, Fukuoka University

• Sasaki Ken

  Notoalloy Co., Ltd.

• Horita Zenji

  WPI, International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University Department of Materials Science and Engineering, Faculty of Engineering, Kyushu University

書誌事項

タイトル別名

• Application of High-Pressure Torsion to WC–Co Ceramic-Based Composites for Improvement of Consolidation, Microstructure and Hardness

抄録

This study shows that ultrafine-grained composites of WC–11 mass% Co are successfully consolidated by high-pressure torsion (HPT) followed by sintering at lower sintering temperatures or shorter sintering time than hot isostatic pressing (HIP) and compression and sintering. For the samples processed by HPT and successive sintering, the grain size (∼700 nm) is smaller and the hardness (∼1700 Hv) is higher when compared to those consolidated by compression and sintering and HIP. A heterogeneous microstructure consisting of nanograins of Co and WC and coarse grains of WC ceramics with high dislocation density, 2 × 10¹⁶ m⁻², is formed during HPT, but the average grain size is slightly increased by subsequent sintering. A W₃Co₃C carbide forms by sintering, while its fraction increases with increasing the shear strain or with increasing the sintering temperature.

収録刊行物

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 54 (9), 1540-1548, 2013

  公益社団法人 日本金属学会

キーワード

• severe plastic deformation (SPD)
• tungsten carbide
• heterogeneous microstructure
• ceramics
• ultrafine-grained (UFG)

詳細情報

• CRID: 1390282679226340736
• NII論文ID: 10031194633
• NII書誌ID: AA1151294X
• DOI: 10.2320/matertrans.mh201318
• COI: 1:CAS:528:DC%2BC3sXhslejtrrJ
• ISSN: 13475320
• ISSN: 13459678
• NDL書誌ID: 024794818
• Web Site: http://id.ndl.go.jp/bib/024794818
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I024794818
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/54/9/54_MH201318/_pdf
• 本文言語コード: en
• データソース種別:
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  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可