2011 Fiscal Year Final Research Report
In-situ observation of crack propagation behavior of ceramics by scanning probe microscope
| Project/Area Number |
21686062
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | Yokohama National University |
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Principal Investigator |
TATAMI Junichi 横浜国立大学, 環境情報研究院, 准教授 (30303085)
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| Project Period (FY) |
2009 – 2011
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| Keywords | セラミックス / 破壊 / 窒化ケイ素 / 走査型プローブ顕微鏡 / その場観察 / 磁歪材料 |
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| Research Abstract |
Small testing machine installed in scanning probe microscope was developed. A one-sided Chevron notched specimen was used for for stable fracture. A crack in the Si_3N_4 ceramics did not always propagate continuously from the tip of the crack. It was also observed that some of the micro cracks discontinuously formed and they connected. In Terfenol-D, which is a magnetostrictive material, magnetic domain structure near the crack tip was changed with crack propagation.
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