High-Temperature Deformation and Fracture Behavior of Al_2O_3-Y_2O_3 Doped Silicon Nitride

この論文にアクセスする

この論文をさがす

著者

抄録

In order to clarify the high-temperature deformation and fracture behavior of Al<SUB>2</SUB>O<SUB>3</SUB>–Y<SUB>2</SUB>O<SUB>3</SUB> doped Si<SUB>3</SUB>N<SUB>4</SUB>, four-point bending tests were conducted at temperatures from room temperature to 1790 K and at strain rates from 1.5×10<SUP>−6</SUP>s<SUP>−1</SUP> to 3×10<SUP>−2</SUP>s<SUP>−1</SUP> in a nitrigen gas of 1.013×10<SUP>5</SUP>Pa (1 atm). As a result, the mechanical equation of state at yield stress was obtained as ε=A(σy⁄E)<SUP>m</SUP>exp(−Q/RT), where m=3.9 in the low temperature range or high strain-rate range, where m=1.7 in the high temperature range or low strain-rate range. The critical strain rate at which m changed shifted to high strain-rate side as temperature rises. It was suggested that plastic deformation of the Si<SUB>3</SUB>N<SUB>4</SUB> was controlled by grain boundary sliding with cavity formation in the range of m=1.7, and dislocation motion and micro-crack propagation in the range of m=3.9. The activation energy for deformation Q was almost independent of strain rate when m=3.9, while Q tended to increase with decreasing strain rate when m=1.7. The relationship between deformation and fracture in Si<SUB>3</SUB>N<SUB>4</SUB> was discussed on the basis of m value and fracture mode.

収録刊行物

  • Materials transactions, JIM

    Materials transactions, JIM 37(3), 430-434, 1996-03

    社団法人 日本金属学会

参考文献:  11件中 1-11件 を表示

  • <no title>

    Silicon Nitride 93, 1993

    被引用文献1件

  • <no title>

    TUREKAWA S.

    J. Japan Inst. Metals 59, 263, 1995

    被引用文献1件

  • <no title>

    LANGE F. F.

    J. Am. Ceram. Soc. 57, 84, 1974

    被引用文献2件

  • Ceramics

    JIS Handbook, 252-259, 1991

    被引用文献1件

  • <no title>

    IKUHARA Y.

    J. Ceram. Soc. Jap. 93, 409, 1985

    被引用文献1件

  • <no title>

    SUDA A.

    Proc. 3rd. IUMRS Inter. Conf. Adv. Mater. 433, 1993

    被引用文献1件

  • <no title>

    KURISHITA H.

    Mater. Sci. Eng. 54, 104, 1982

    被引用文献1件

  • <no title>

    CANNON W. R.

    J. Mater. Sci. 18, 1, 1983

    被引用文献6件

  • <no title>

    GRATHWOHL G.

    Deformation of Ceramics II 573, 1984

    被引用文献1件

  • <no title>

    LANGE F. F.

    Progress in Nitrogen Ceramics 467, 1983

    被引用文献1件

  • <no title>

    EVANS A. G.

    Progress in Materials Science 21, 1676, 1976

    被引用文献1件

被引用文献:  1件中 1-1件 を表示

各種コード

  • NII論文ID(NAID)
    10002447703
  • NII書誌ID(NCID)
    AA10699969
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    09161821
  • データ提供元
    CJP書誌  CJP引用  J-STAGE 
ページトップへ