Effect of Titania Doping on Phase Stability of Zirconia Bioceramics in Hot Water

• Takigawa Yorinobu

  Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University

• Naka Yukihisa

  Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University

• Higashi Kenji

  Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University

抄録

The effect of titania doping on tetragonal to monoclinic (t-m) phase transformation of zirconia bioceramics is evaluated by ageing in hot water at 413 K. The examined materials are 3 mol%Y₂O₃ stabilized tetragonal zirconia polycrystal (3Y-TZP) and 1.5, 3.0 and 7.7 mol%TiO₂-doped 3Y-TZP. The t-m phase transformation of 3Y-TZP is accelerated by titania doping in all the specimen examined. However, 7.7 mol%TiO₂-doped TZP shows better phase stability than 1.5 or 3.0 mol%TiO₂-doped one. This change in phase stability of 7.7 mol%TiO₂-doped TZP cannot be simply explained from the difference of grain size or the change in the axial ratio, c⁄a. XRD analysis reveals that the distance between nearest neighbor anion and cation site significantly decreases only in 7.7 mol%TiO₂-doped TZP. This result indicates that the binding energy between dopant and oxygen vacancy affects the phase stability as well as the change in the axial ratio, c⁄a.

収録刊行物

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 48 (3), 332-336, 2007

  公益社団法人 日本金属学会

キーワード

• zirconia
• phase stability
• <I>t</I>-<I>m</I> transformation
• titania-doping
• oxygen vacancy
• binding energy

詳細情報

• CRID: 1390001204252019584
• NII論文ID: 130004453466
• NII論文ID: 10018734313
• NII書誌ID: AA1151294X
• DOI: 10.2320/matertrans.48.332
• ISSN: 13475320
• ISSN: 13459678
• NDL書誌ID: 8670465
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8670465
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/48/3/48_MH200621/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可