(CeO_2)_<1-x>(YO_<1.5>)_xの合成と弾性特性の評価に関する研究  [in Japanese] Evaluation of Elastic Property of (CeO_2)_<1-x>(YO_<1.5>)_x Ceramics  [in Japanese]

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Author(s)

    • 佐藤 一永 SATO Kazuhisa
    • 東北大学多元物質科学研究所 Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
    • 橋田 俊之 HASHIDA Toshiyuki
    • 東北大学大学院工学研究科附属エネルギー安全科学国際研究センター Fracture and Reliability Research Institute, Tohoku University
    • 鈴木 研 [他] SUZUKI Ken
    • 東北大学大学院工学研究科附属エネルギー安全科学国際研究センター Fracture and Reliability Research Institute, Tohoku University
    • 川田 達也 KAWADA Tatsuya
    • 東北大学多元物質科学研究所 Institute of Multidisciplinary Research for Advanced Materials, Tohoku University

Abstract

The influences of the sintering additive content of Y<sub>2</sub>O<sub>3</sub> on elastic modulus of ceria ceramics were investigated by small punch (SP) testing method and molecular dynamics (MD) method. Y<sub>2</sub>O<sub>3</sub> doped ceria powders with a composition of (CeO<sub>2</sub>)<sub>1-x</sub>(YO<sub>1.5</sub>)<sub>x</sub> (x=0, 0.10, 0.15, 0.20, 0.30, 0.40) were prepared by a co-precipitation method. The powders were compacted by die pressing (50 MPa) followed by cold isostatic pressing (120 MPa), and sintered at 1500°C in air for 5 h. The elastic modulus was decreased significantly with increasing additive contents of the Y<sub>2</sub>O<sub>3</sub> oxides. Especially, it tended to exhibit a minimum value at 10∼20 mol%. However, ionic conductivity increased with increasing additive content of the Y<sub>2</sub>O<sub>3</sub> oxides, exhibited a maximum value at 15 mol%. Calculation model and interatomic potential were shown to be useful to evaluate the elastic property.

Journal

  • Journal of the Japan Society of Powder and Powder Metallurgy

    Journal of the Japan Society of Powder and Powder Metallurgy 52(11), 840-844, 2005-11-15

    Japan Society of Powder and Powder Metallurgy

References:  18

Codes

  • NII Article ID (NAID)
    130000056254
  • NII NACSIS-CAT ID (NCID)
    AN00222724
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    05328799
  • NDL Article ID
    7734159
  • NDL Source Classification
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL Call No.
    Z17-274
  • Data Source
    CJP  NDL  J-STAGE 
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