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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Engineering / Faculty of Engineering >
Peer-reviewed Journal Articles, etc >
薄片化した α-アルミナの応力拡大係数と亀裂進展挙動
| Title: | 薄片化した α-アルミナの応力拡大係数と亀裂進展挙動 |
| Other Titles: | Stress Intensity Factor and Crack Propagation Behavior of Thin α-Alumina |
| Authors: | 松尾, 孟1 Browse this author | | 海江田, 裕介2 Browse this author | | 児嶋, 伸浩3 Browse this author | | 池田, 賢一4 Browse this author →KAKEN DB | | 波多, 聰5 Browse this author | | 中島, 英治6 Browse this author |
| Authors(alt): | Matsuo, Hajime1 | | Kaieda, Yusuke2 | | Kojima, Nobuhiro3 | | Ikeda, Ken-ichi4 | | Hata, Satoshi5 | | Nakashima, Hideharu6 |
| Keywords: | thin ceramics | | polycrystalline alumina | | stress intensity factor | | transgranular fracture rate | | crack deflection rate |
| Issue Date: | Jan-2010 |
| Publisher: | 日本金属学会 |
| Journal Title: | 日本金属学会誌 |
| Journal Title(alt): | Journal of the Japan Institute of Metals |
| Volume: | 74 |
| Issue: | 1 |
| Start Page: | 24 |
| End Page: | 29 |
| Publisher DOI: | 10.2320/jinstmet.74.24 |
| Abstract: | This paper reports the mechanical property and crack propagation behavior of thin ceramics. A method to evaluate the stress intensity factor, KI, of thin ceramics was proposed. Dependence of KI values on the average grain size, d, of thin α-alumina were measured by the method. KI values of thin α-alumina decreased with increasing d values from 4.3 μm to 15.2 μm, while the KI values were almost constant for 15.2 μm≤d≤63.0 μm. The trend of KI values agreed with the dependence of fracture toughness, Kc, of bulk α-alumina. The thin α-alumina specimens after crack propagation were investigated by scanning electron microscopic electron back-scattered diffraction (SEM/EBSD) analysis. Branched cracks were hardly observed, regardless of grain size. The result indicates that the toughing mechanism do not occur in the thin α-alumina. Dependence of the transgranular fracture rate, F, and the crack deflection rate, D, on d were measured from the orientation distribution maps. However, the F values and the D values were independent of d and approximately constant. The F values and D values depend on d in bulk α-alumina. It indicates that the crack propagation behavior is varied by thinning α-alumina. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/75540 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 池田 賢一
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