Tensile and bending behavior of melt growth Al2O3/YAG composite at ultra high temperatures (1773-2023K)

S. Ochiai, Y. Sakai, K. Sato, T. Ueda, K. Morishita, H. Okuda, M. Tanaka, M. Hojo, Y. Waku, N. Nakagawa, S. Sakata, A. Mitani, T. Takahashi

研究成果: Contribution to journalConference article査読

抄録

The deformation and fracture behavior at 1773-2023K of the unidirectionally solidified eutectic Al2O3/YAG (Yttrium-Aluminum Garnet with the composition of Y3A15O13) ceramic composite was investigated. The stress-stain curve and strength of unnotched and notched specimens, measured by bending and tensile tests, showed that (a) both unnotched and notched specimens fractured in a brittle manner at low temperatures and at high displacement speeds, but in a ductile manner at high temperatures and at low displacement speeds, and (b) the notched strength increased, reaching maximum, and decreased with increasing temperature and decreasing displacement speed. The increase in the notched strength with increasing temperature and decreasing displacement speed up to the maximum value was accounted for by the increase in plastic zone size ahead of the notch, and the decrease with further increasing temperature and decreasing displacement speed by the loss of the stress carrying capacity of the yielded ligament, based on the finite element analysis.

本文言語英語
ページ(範囲)1091-1096
ページ数6
ジャーナルMaterials Science Forum
475-479
II
DOI
出版ステータス出版済み - 1 1 2005
外部発表はい
イベントPRICM 5: The Fifth Pacific Rim International Conference on Advanced Materials and Processing - Beijing, 中国
継続期間: 11 2 200411 5 2004

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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