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1990 Fiscal Year Final Research Report Summary

Fabrication of Oxide Ceramics with High Fracture Strength and High Thermal Shock Resistance

Research Project

Project/Area Number 63850163
Research Category

Grant-in-Aid for Developmental Scientific Research (B).

Allocation TypeSingle-year Grants
Research Field 無機工業化学
Research InstitutionTohoku University

Principal Investigator

SHIMADA Masahiko  Tohoku University, Faculty of Engineering Professor, 工学部, 教授 (80029701)

Co-Investigator(Kenkyū-buntansha) SATO Tsugio  Tohoku University, Faculty of Engineering Associate Professor, 工学部, 助教授 (90091694)
ENDO Tadashi  Tohoku University, Faculty of Engineering Associate Professor, 工学部, 助教授 (30176797)
Project Period (FY) 1988 – 1990
KeywordsTetragonal zirconia polycrystals / Y-TZP based ceramic composites / Y-TZP / A1_2O_3 composite / Y-TZP / mullite composite / Y-TZP / SiC whisker composite / Thermal shock resistance / Thermal stress fracture / Post-sintering hot isostatic pressing
Research Abstract

In order to improve mechanical properties and thermal shock resistance of tetragonal zirconia polycrystals with high fracture strength and toughness, thermal stress fracture behavior and mechanical properties of yttria-doped tetragonal zirconia polycrystals (Y-TZP) and Y-YZP based ceramics were investigated. The thermal stress fracture of ceramic materials in the water-quenching test was initiated by the thermal stress due to the convective heat transfer accompanied by boiling of water. The thermal shock resistance of ceramic materials increased with increasing the fracture strength, thermal conductivity and thermal transfer coefficient and with decreasing Young's modulus, Poison's ratio and thermal expansion coefficient of the material. The thermal shock resistance of Y-TZP based ceramics was anormalously lower than the predicted value, because the toughening mechanism by the stress-induced tetragonal to monoclinic phase transformation did not function well against the thermal stress … More in Y-TZP ceramics. The increment of the grain size of Y-TZP ceramics increased the contribution of the transformation toughening against not only the mechanical-stress fracture but also the thermal-stress fracture, which consequently improved both fracture toughness and thermal shock resistance. Therefore, the thermal shock resistance of Y-TZP was correlated with the fracture toughness rather than fracture strength. Dispersion of A1_2O_3 particles into Y-TZP was useful for improving both the fracture strength and thermal shock resistance. On the other hand, dispersion of mullite particles and SiC whiskers into Y-TZP resulted in decreasing the relative density and fracture strength but in increasing the thermal shock resistance, because of the decrease of the thermal expansion coefficient and of the increase of the thermal conductivity. Hot isostatic pressing of the presintered body was useful to increase the relative density without the grain growth and to improve the fracture strength and thermal shock resistance. Less

  • Research Products

    (19 results)

All Other

All Publications (19 results)

  • [Publications] Tsugio Sato,Masayuki Ishitsuka,Tadashi Endo and Masahiko Shimada,: "Thermal Shock Rcsistance of ZrO_2 Based Ceramics" Materials & Design,. 9. 204-212 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Tsugio Sato,Masayuki Ishitsuks,Toshiya Fulushima,Tadashi Endo and Masahiko Shimada,: "Thermal Shock Resistance of YttriaーDoped Tetragonal Zirconia Polycystals" Mater.Sci.Forum. 34/36. 189-193 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 佐藤 次雄,石塚 雅之,遠藤 忠,島田 昌彦,嵐 治夫: "ジルコニアセラミックスの熱衝撃破壊" ジルコニアセラミックス,. 10. 157-174 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Masayuki Ishitsuka,Tsugio Sato,Tadashi Endo,Masahiko Shimada and Haruo Arashi: "Raman MicroーProbe Spectroscopic Studies on Thermal Fracture of ZrO_2ーBased Ceramics" J.Mater.Sci.Lett.8. 638-640 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Masayuki Ishitsuka,Tsugio Sato,Tadashi Endo and Masahiko Shimada,: "Thermal Shock Fracture Behaviour of ZrO_2 Based Ceramics" J.Mater.Sci.,. 24. 4057-4061 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Tsugio Sato,Tadashi Endo and Masahiko Shimada,: "Postsintering Hot Isostatic Pressing of CeriaーDoped Tetragonal Zirconia/Alumina Composites in an ArgonーOxygen Gas Atmosphere" J.Amer.Ceram.Soc.761-764 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Masayuki Ishitsuka,Tsugio Sato,Tadashi Endo and Masahiko Shimada,Hideo Oーno,Naoki Igawa and Takanori Nagasaki: "GrainーSize Dependence of ThermalーShock Resistance of YttriaーDoped Tetragonal Zirconia Polycrystals" J.Amer.Ceram.Soc.,. 73. 2523-2525 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 寺内 信哉,佐藤 次雄,遠藤 忠,島田 昌彦,: "YーTZP/SiC複合体の焼結と機械的性質" 粉体および粉末冶金,. 37. 1063-1066 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Tsugio sato, Masayuki Ishitsuka, Tadashi Endo and Masahiko Shimada: "Thermal Shock Resistance of ZrO_2 Based Ceramics" Materials & Design. 9. 204-212 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tsugio Sato, Masayuki Ishitsuka, Toshiya Hukushima, Tadashi Endo and Masahiko Shimada: "Thermal Shock Resistance of Yttria-Doped Tetragonal Zircoonia Polycrystals" Mater. Sci. Forum. 34/36. 189-193 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Masahiko Shimada, Tsugio Sato, Masayuki Ishitsuka and Tadashi Endo: "Thermal Shock Resistance of ZrO_2 Based Materials" Proc. 4th Int. Symp. Sci. Technol. Sintering. 1155-1160 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tsugio Sato, Masayuki Ishitsuka, Tadashi Endo, Masahiko Shimada and Haruo Arashi: "Thermal Stress Fracture of Zirconia Ceramics" Zirconia Ceramics. 10. 157-174 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Masayuki Ishitsuka, Tsugio Sato, Tadashi Endo, Masahiko Shimada and Haruo Arashi: "Raman Microprobe Spectroscopic Studies on Thermal Shock Fracture of ZrO_2-Based Ceramics" J. Mater. Sci. Lett.8. 638-640 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Masayuki Ishitsuka, Tsugio Sato, Tadashi Endo and Masahiko Shimada: "Thermal shock Fracture Behavior of ZrO_2 Based Ceramics" J. Mater. Sci.24. 4057-4061 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tsugio Sato, Tadashi Endo and Masahiko Shimada: "Postsintering Hot Isostatic Pressing of Ceria-Doped Tetragonal Zirconia/Alumina Composites in an Argon-Oxygen Gas Atmosphere" J. Amer. Ceram. Soc.72. 761-764 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tsugio Sato, Tadashi Endo and Masahiko Shimada: "Hot-Isostatic Pressing of Yttria and Ceria Doped Zirconia/Alumina Composites in Oxygen Atmosphere" Proc. MRS Int. Conf. Adv. Mater. Struct. Ceram.293-300 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tsugio Sato, Tadashi Endo and Masahiko Shimada: "Post-Sintering Hot Isostatic Pressing of Ceria-Doped Tetragonal Zirconia/Alumina Composites" Proc. Zirconia 88 Adv. Zirconia Sci. Technol.293-300 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Masayuki Ishitsuka, Tsugio Sato, Tadashi Endo, Masahiko Shimada, Hideo O-no, Naoki Igawa and Takanori Nagasaki: "Grain-Size Dependence of Thermal-Shock Resistance of Yttria-Doped Tetragonal Zirconia Polycrystals" J. Amer. Ceram. Soc.73. 2523-2525 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sinya Terauchi, Tsugio Sato, Tadasi Endo and Masahiko Shimada: "Sintering and Mechanical Properties of Y-TZP/SiC Composites" Funmatsu Oyobi Funmatsuyakin. 37. 1063-1066 (1990)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1993-08-12  

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