Effect of Pre-crack Size and Crack-healing Temperature on Fatigue Strength of Mullite/SiC Ceramics(Ceramics & Rocks 2)

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概要

• 論文の詳細を見る

• Mullite/SiC composite ceramics was sintered and subjected to three-point bending on specimens made according to the appropriate JIS standard. Semi-elliptic surface crack of 100 - 200 μm in diameter was made on each specimen. By using three kinds of specimens that was smooth, cracked and crack healed, crack-healing behavior and cyclic fatigue strength were determined systematically at room temperature. Static fatigue strengths was determined systematically at room temperature,700℃ and 1000℃. A crack was healed at 1000℃. The main conclusions obtained are following: (a) Mullite/SiC composite ceramics has an ability to heal a crack, (b) Crack healed specimens showed higher cyclic and static fatigue strengths than as-received specimens, and this fact was caused by healing of small cracks caused by polishing, (c) Crack-healed zone had enough fatigue strength and most fracture occurred outside the crack-healed zone, (d) Crack-healed specimen has sufficient strengths for cyclic and static fatigue at room temperature, (e) The static fatigue strengths of crack-healed samples at 700℃ and 1000℃ were similar to the values at room temperature, (f) The specimen subjected to crack-healing at 1000℃ had a sufficient fatigue strength even at 1000℃.

• 一般社団法人日本機械学会の論文
• 2001-10-20

著者

• TSUJI Kiichi

  Departmetnt of Biomedical Engineering, Faculty of Engineering, Toin University of Yokohama

• Tsuji Kiichi

  Department Of Biomedical Engineering Toin University Of Yokohama

• Chu Min

  Department Of Energy & Safety Engineering Yokohama National University

• ANDO Kotoji

  Department of Energy & Safety Engineering, Yokohama National University

• FURUSAWA Kotokaze

  Graduate School of Engineering, Yokohama National University

• HANAGATA Tsuyoshi

  Graduate School of Engineering, Yokohama National University

• SATO Shigemi

  Research & Development Dept, NHK Spring Co., Ltd.

• Chu M

  Yokohama National Univ. Hodogaya Jpn

• Ando K

  Yokohama National Univ. Hodogaya Jpn

• Sato S

  Nhk Spring Kanazawaku Jpn

• Hanagata Tsuyoshi

  Graduate School Of Engineering Yokohama National University

• Furusawa Kotokaze

  Graduate School Of Engineering Yokohama National University

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