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Grain Boundary Design using Ceramic Multiple Crystals and Plasticity

Research Project

Project/Area Number 11450260
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Structural/Functional materials
Research InstitutionThe University of Tokyo

Principal Investigator

IKUHARA Yuichi  Engineering Research Institute, The University of Tokyo, Associate Professor, 工学部・附属総合試験所, 助教授 (70192474)

Project Period (FY) 1999 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥14,200,000 (Direct Cost: ¥14,200,000)
Fiscal Year 2001: ¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2000: ¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 1999: ¥8,600,000 (Direct Cost: ¥8,600,000)
KeywordsMultiple Crystal / Alumina / Zirconia / Coincidence Site Lattice Boundary / Grain Boundary Sliding / Stress Accommodation / Creep / Transmission Electron Microscopy / マルチプルクりスタル / バイクリスタル / 高分解能電子顕微鏡法 / 高温変形 / 粒界性格
Research Abstract

In this year, alumina and zirconia multiple crystals were systematically fabricated, and the respective grain boundary structure and chemistry were characterized by high-resolution electron microscopy (HREM), energy dispersive X-ray spectroscopy (EDS) and electron energy loss spectroscopy (EELS).
Alumina multiple crystals were fabricated by a hot joining technique at 1500 ℃ in air to obtain ten kinds of tilt grain boundaries which included small angle, CSL and high angle grain boundaries. It was found that grain boundary energy strongly depended on the grain boundary characters, e.g., there were large energy cusps at low Σ CSL grain boundaries. But, main part of grain boundary energy is likely to be due to the strain energy around the grain boundary, and the contribution of atomic configuration is not so large. Small angle grain boundaries were consisted of an array of partial dislocation with Burgers vector of 1/3[1 1^^- 00] to form the stacking faults between the dislocations. The beh … More avior of grain boundary sliding was also investigated for typical grain boundaries by high-temperature creep test at 1400 ℃. As the result, the occurrence of grain boundary sliding was found to depend on the grain boundary geometry and atomic structure.
Zirconia multiple crystals were also fabricated by a hot joining technique at 1600 ℃ in air to obtain ten kinds of tilt grain boundaries. It was found that the grain boundary structure and energy strongly depended on the grain boundary characters. For example, Σ9 grain boundary showed particularly high energy because the structure unit is highly strained at the boundary, although the amount of segregated yttrium is very large. In the case of Σ3 boundary, the atomic structure depends on the boundary planes. When boundary plane is (111), the boundary is perfectly straight along the (111) plane, however, facet structure is formed along (111)//(115) planes when the initial boundary plane is set parallel to (112). The relationship between grain boundary characters and energy will be discussed in detail from the view point of atomic structures and segregation for all kinds of grain boundaries in zirconia. Less

Report

(4 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • 1999 Annual Research Report
  • Research Products

    (32 results)

All Other

All Publications (32 results)

  • [Publications] N.Shibata.J.Katamura, A.Kuwabara, Y.Ikuhara, T.Sakuma: "The instability and resulting phase transition of cubic zirconia"Materials Science & Engineering A. Vol.312. 90-98 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] N.Shibata, T.Yamamoto, Y.Ikuhara, T.Sakuma: "Structure of [110] tilt grain boundaries in zirconia bicrystals"J. Electro. Microsopy. Vol.50. 429-433 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Y.Ikuhara, H.Yoshida, T.Sakuma: "Impurity effects on grain boundary strength in structural"Mater. Sci. Eng. A3190321. 24-30 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] T.Yamarnoto, Y.Ikuhara, T.Watanabe, T.Sakuma, Y.Taniuchi, K.Okada, T.Tanase: "High resolution microscopy study in Cr_3C_2-doped WC-Co"J. Mater. Sci.. Vol.36. 3885-3890 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Y.Ikuhara: "Grain Boundary and Interface Structures in Ceramics"J. Ceram. Soc. Jap.. Vol.109. S110-S120 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] T.Yamamoto, Y.Ikuhara: "Electron transport behaviour in Nb-doped SrTiO3 bicrystals"J. Electro. Microsopy.. Vol.50. 485-488 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] N.Shibata., J.Katamura., A.Kuwabara., Y.Ikuhara and T.Sakuma: "The instability and resulting phase transition of cubic zirconia"Materials Science & Engineering A. Vol.312. 90-98 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] N.Shibata., T.Yamamoto., Y.Ikuhara and T.Sakuma: "Structure of [110] tilt grain boundaries in zirconia bicrystals"J. Electro. Microsopy. Vol.50. 429-433 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Y.Ikuhara, H.Yoshida and T.Sakuma: "Impurity effects on grain boundary strength in structural ceramics"Mater. Sci. Eng.. A3190321. 24-30 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] T.Yamamoto. Y.Ikuhara., T.Watanabe., T.Sakuma., Y.Taniuchi., K.Okada., T.Tanase: "High resolution microscopy study in Cr_3C_2-doped WC-Co"J. Mater. Sci.. Vol.36. 3885-3890 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Y.Ikuhara: "Grain Boundary and Interface Structures in Ceramics"J. Ceram. Soc. Jap.. Vol.109. S110-120 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] T.Yamamoto and Y.Ikuhara: "Electron transport behaviour in Nb-doped SrTiO3 bicrystals"J. Electro. Microsopy. Vol.50. 485-488 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] N.Shibata., J.Katamura., A.Kuwabara., Y.Ikuhara, T.Sakuma: "The instability and resulting phase transition of cubic zirconia"Materials Science & Engineering A. Vol.312. 90-98 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] N.Shibata., T.Yamamoto., Y.Ikuhara, T.Sakuma: "Structure of [110] tilt grain boundaries in zirconia bicrystals"J. Electro. Microsopy. Vol.50. 429-433 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Y.Ikuhara, H.Yoshida, T.Sakuma: "Impurity effects on grain boundary strength in structural ceramics"Mater. Sci .Eng. A3190321. 24-30 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] T.Yamamoto, Y.Ikuhara, T.Watanabe, T.Sakuma, Y.Taniuchi, K.Okada, T.Tanase: "High resolution microscopy study in Cr_3C_2-doped WC-Co"J. Mater. Sci.. Vol.36. 3885-3890 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Y.Ikuhara: "Grain Boundary and Interface Structures in Ceramics"J. Ceram. Soc. Jap.. Vol.109. S110-S120 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] T.Yamamoto, Y.Ikuhara: "Electron transport behaviour in Nb-doped SrTiO3 bicrystals"J. Electro. Microsopy. Vol.50. 485-488 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] T.Watanabe,II.Yoshida,T.Yamamoto,Y.Ikuhara and T.Sakuma: ""Atomic Structures and Properties of Symmetric [000l]Tilt Grain Boundaries in Alumina""Ceram.Trans.. vol.118. 369-376 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Y.Ikuhara,T.Watanabe,T.Saito,T.Yamamoto and T.Sakuma: ""An Approach to Grain Boundary Design Using Ceramic Bicrystals""Ceram.Trans.. vol.118. 293-301 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Y.Ikuhara,T.Watanabe.T.Yamamoto,T.Saito,H.Yoshida and T.Sakuma: ""Grain Boundary Structure and Sliding of Alumina Bicrystals""Proc.Mater.Res.Soc.. vol.601. 125-132 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 幾原雄一,吉田英弘,佐久間健人: ""セラミックスの結晶粒界と局在量子構造""まてりあ. 39. 558-562 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] T.Watanabe,H.Yoshida,T.Saito,T.Yamamoto,Y.Ikuhara and T.Sakuma: ""Grain Boundary Energy and Atomic Structure in Alumina Bicrystals""Mater.Sic.Forum. vol.304-306. 601-606 (1999)

    • Related Report
      2000 Annual Research Report
  • [Publications] Y.Ikuhara,T.Watanabe,T.Saito,H.Yoshida and T.Sakuma: ""Atomic Structure and Chemical Bonding State of Sapphire Bicrystals""Mater.Sci.Forum. vol.294-296. 273-276 (1999)

    • Related Report
      2000 Annual Research Report
  • [Publications] 幾原雄一: "「セラミック材料の物理」"日刊工業新聞社. 343 (1999)

    • Related Report
      2000 Annual Research Report
  • [Publications] Y.Ikuhara: "High-Temperature Behavior of SiO2 at Grain Boundaries in TZP"Interface Science. 7. 77-84 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] T.Watanabe: "Grain Boundary Energy and Atomic Structure in Alumind Bicrystals"Mater.Sci.Forum. 304-306. 601-606 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Y.Ikuhara: "Atomic Structure and Chemical Bonding State of Sapphire Bicrystals"Mater.Sci.Forum. 294-296. 273-276 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] H.Yoshida: "A Critical Factor to Determine the High-Temperature Creep Resistance in Cation-Doped Polycrystalline Al 203"Key Eng.Mater.. 171〜174. 809-816 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] H.Yoshida: "High-Temperature Deformation in Unidirectionally Solidified Eutectic Al203-YAG Single Crystal"Key Eng.Mater.. 171〜174. 855-862 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] Y.Ikuhara: "Grain Boundary Structure and Sliding of Alumina Bicrystals"Proc.Mater.Res.Soc.. (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 幾原雄一: "セラミック材料の物理"日刊工業新聞社. 343 (1999)

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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