Fracture Resistance and Contact Damage of TiN Particle Reinforced Si_3N_4 Ceramics(Properties (structural and functional),<Special Issue>Guest Editors Dedicated to Prof. Gunter Petzow: Modern Trends in Advanced Ceramics)

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概要

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• The R-curve behavior, spherical Hertzian contact damage and cyclic contact damage of a bearing grade Si_3N_4 ceramic reinforced with TiN particle dispersion are investigated and compared with the performance of a reference Si_3N_4 ceramic without TiN but with a similar microstructure. These ceramics were produced by firing powder compacts of Si_3N_4, Y_2O_3 and Al_2O_3, with and without additional AlN and TiO_2, at 1800℃ for 2h in 0.9 MPa N_2, followed by hot isostatic pressing at 1700℃. The ceramic without TiN has an R-curve with an initial value around 5.5MPam^<1/2>, which slowly rises to 6.5MPam^<1/2> after a crack extension of 300μm. In contrast, the Si_3N_4 ceramic with TiN particles has a higher initial K_R value but the R-curve remains relatively flat during subsequent crack growth. The latter ceramic exhibits a higher critical stress for permanent deformation and for ring-crack formation on the indented surfaces. It also demonstrates a better retention of the residual strength after single and repeated Hertzian indentation. The superior performance of the TiN-reinforced ceramic is attributed to the strengthening of grain boundary by TiN particles. Specifically, the resistance against contact and fatigue damage of this bearing grade Si_3N_4 is explained in terms of the effect of high grain boundary strength on the R-curve behavior, grain boundary microcracking, and the balance between crack shielding accumulation and degradation by grain boundary sliding during cyclic loading.

• 社団法人日本セラミックス協会の論文
• 2006-11-01

著者

• KIM Do

  Department of Aqualife Medicine, College of Fisheries and Ocean Sciences, Chonnam National Universit

• TATAMI Junichi

  Graduate School of Environment and Information Science, Yokohama National University

• KOMEYA Katsutoshi

  Graduate School of Environment and Information Science, Yokohama National University

• MEGURO Takeshi

  Graduate School of Environment and Information Science, Yokohama National University

• Kondo K

  Kyoto Univ. Kyoto Jpn

• Meguro Takeshi

  Graduate School Of Environment And Information Sciences Yokohama National Univ.

• Meguro Takeshi

  Graduate School Of Environment And Information Science Yokohama National University

• Wakihara Toru

  Graduate School Of Environment And Information Sciences Yokohama National Univ.

• Yamamoto Yohei

  Graduate School Of Environment And Information Sciences Yokohama National University

• CHEN I.-Wei

  Department of Materials Science and Engineering, University of Pennsylvania

• KOMASTU Michiyasu

  Toshiba Materials Co., Ltd.

• Komeya K

  Graduate School Of Environment And Information Sciences Yokohama National Univ.

• Komeya Katutoshi

  Graduate School Of Environment And Information Science Yokohama National University

• Kondo K

  Tokyo Inst. Technol. Yokohama Jpn

• Tatami Junichi

  Department Of Artificial Environment And Information Faculty Of Environment And Information Sciences

• Meguro Takeshi

  Department Of Artificial Environment And Information Faculty Of Environment And Information Sciences

• Kondo K

  Stanley Electric Co. Ltd. Yokohama Jpn

• Kondo Kazuhiro

  Fujitsu Laboratories Ltd.

• Kondo K

  Fujitsu Laboratories Ltd.

• Kondo Kunitaka

  Institute Of Physics University Of Tsukuba

• Kim Do

  Department Of Materials Science & Engineering Korea Advanced Institute Of Science And Technology

• Chen I.-wei

  Department Of Materials Science And Engineering University Of Pennsylvania

• Kim Do

  Department Of Aqualife Medicine College Of Fisheries And Ocean Sciences Chonnam National University

• Kondo Ken'ichi

  Broadcasting Science Research Laboratories Of Nippon Hoso Kyokai:(present Address) Moririka Electron

• Komeya Katsutoshi

  Graduate School Of Environment And Information Science Yokohama National University

• Komastu Michiyasu

  Toshiba Materials Co. Ltd.

• Kim Do

  Department Of Applied Mathematics Pukyong National University

• Kim Do

  Department Of Applied Mathematics College Of Natural Sciences National Fisheries University Of Pusan

• Wakihara Toru

  Graduate School And Research Institute Of Environment And Information Sciences Yokohama National University

• Tatami Junichi

  Graduate School And Research Institute Of Environment And Information Sciences Yokohama National University

• Meguro Takeshi

  Graduate School and Research Institute of Environment and Information Sciences, Yokohama National University

• Tatami Junichi

  Graduate School and Research Institute of Environment and Information Sciences, Yokohama National University

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