Fabrication, microstructure and properties of in situ synthesized B4C^|^ndash;NbB2 eutectic composites by spark plasma sintering

• DEMIRSKYI Dmytro

  National Institute for Materials Science

• SAKKA Yoshio

  National Institute for Materials Science

書誌事項

タイトル別名

• Fabrication, microstructure and properties of in situ synthesized B₄C–NbB₂ eutectic composites by spark plasma sintering
• Fabrication, microstructure and properties of in situ synthesized B4C–NbB2 eutectic composites by spark plasma sintering

抄録

Fabrication, microstructure and properties of in situ formation of strengthened eutectic composites, consisting of a matrix (B₄C, and B₄C–NbB₂ composite) and also containing regularly distributed whiskers of NbB₂ by spark plasma sintering (SPS) is reported. It has shown that pressure and the temperature at which pressure is decreased during SPS may be used as a means of controlling the eutectic formation and composites microstructure. The microstructure-property relations were determined for composites of NbB₂–B₄C eutectic composition as a function of NbB₂ content, eutectic inclusion rod size and NbB₂–NbB₂ spacing distance. It was found that the composites with the eutectic composition of 30–35 mol.% NbB₂ obtained by SPS exhibit a high Vickers hardness (26–27 GPa) and a maximum in indentation fracture toughness (~7 MPa·m^1/2) in case of interlamelar spacing distance of 0.8 ± 0.4 µm.

収録刊行物

• Journal of the Ceramic Society of Japan

  Journal of the Ceramic Society of Japan 123 (1433), 33-37, 2015

  公益社団法人 日本セラミックス協会

キーワード

• Spark–plasma sintering
• Eutectic
• B₄C
• NbB₂

詳細情報

• CRID: 1390001205286214144
• NII論文ID: 130004951093
• DOI: 10.2109/jcersj2.123.33
• ISSN: 13486535
• ISSN: 18820743
• Web Site: https://www.jstage.jst.go.jp/article/jcersj2/123/1433/123_JCSJ-P14173/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可