高強度(σ_b≧1GPa)と強靱性(K_<IC>≧20MPa・m^<1/2>)を同時に実現したパルス通電加圧焼結法(PECPS)によるアルミナ固溶ジルコニアセラミックスの作製 Fabrication of ZrO_2 Solid Solution Ceramics Containing Al_2O_3 Having High Bending Strength (σ_b≧1GPa) and High Fracture Toughness (K_<IC>≧20MPa・m^<1/2>) Simultaneously by Pulsed Electric-current Pressure Sintering (PECPS)

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著者

    • 柴谷 健伍 SHIBAYA Kengo
    • 同志社大学理工学部機能分子・生命化学科 Department of Molecular Chemistry & Biochemistry, Faculty of Science & Engineering, Doshisha University
    • 佐藤 英行 SATO Hideyuki
    • 同志社大学理工学部機能分子・生命化学科 Department of Molecular Chemistry & Biochemistry, Faculty of Science & Engineering, Doshisha University
    • 松田 洋幸 [他] MATSUDA Hiroyuki
    • 同志社大学理工学部機能分子・生命化学科 Department of Molecular Chemistry & Biochemistry, Faculty of Science & Engineering, Doshisha University
    • 高岡 勝哉 TAKAOKA Katsuya
    • 同志社大学理工学部機能分子・生命化学科 Department of Molecular Chemistry & Biochemistry, Faculty of Science & Engineering, Doshisha University
    • 加藤 将樹 KATO Masaki
    • 同志社大学理工学部機能分子・生命化学科 Department of Molecular Chemistry & Biochemistry, Faculty of Science & Engineering, Doshisha University
    • 廣田 健 HIROTA Ken
    • 同志社大学理工学部機能分子・生命化学科 Department of Molecular Chemistry & Biochemistry, Faculty of Science & Engineering, Doshisha University

抄録

ZrO<SUB>2</SUB> solid solution (<I>ss</I>) ceramics containing 25mol%Al<SUB>2</SUB>O<SUB>3</SUB> and 1.125mol%Y<SUB>2</SUB>O<SUB>3</SUB>, <I>i.e.</I>, 75mol%ZrO<SUB>2</SUB>(1.5mol%Y<SUB>2</SUB>O<SUB>3</SUB>:1.5Y)-25mol%Al<SUB>2</SUB>O<SUB>3</SUB> ceramics, have been fabricated by sintering cubic ZrO<SUB>2</SUB> (<I>ss</I>) nanoparticles prepared via a sol-gel process with a pulsed electric-current pressure sintering (PECPS) at 1100°∼1350°C for 10 min under 60 MPa in Ar. Dense tetragonal-ZrO<SUB>2</SUB> (<I>ss</I>) ceramics with a small amount of α-Al<SUB>2</SUB>O<SUB>3</SUB>, sintered at 1300° to 1350°C, were composed of 0.2-0.3 μm grains with a high relative density of ≥97.5 %. They showed extreme high bending strength (σ<SUB>b</SUB>≥1 GPa) and high fracture toughness (<I>K</I><SUB>IC</SUB>≥20 MPa·m<SUP>1/2</SUP>) simultaneously. High-resolution TEM observation revealed that these mechanical properties were originated from homogeneous distribution of α-Al<SUB>2</SUB>O<SUB>3</SUB> particles in the nanometer-grain matrix of <I>t</I>-ZrO<SUB>2</SUB>; the precipitation of α-Al<SUB>2</SUB>O<SUB>3</SUB> could be achieved by adopting the solid solution powders containing α-Al<SUB>2</SUB>O<SUB>3</SUB> and PECPS.

収録刊行物

  • 粉体および粉末冶金

    粉体および粉末冶金 58(12), 727-732, 2011-12-15

    一般社団法人 粉体粉末冶金協会

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各種コード

  • NII論文ID(NAID)
    10030479629
  • NII書誌ID(NCID)
    AN00222724
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    05328799
  • NDL 記事登録ID
    023403413
  • NDL 請求記号
    Z17-274
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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