Seidel, Jürgen ; Rödel, Jürgen (1997)
Measurement of crack tip toughness in alumina as a function of grain size.
In: Journal of the American Ceramic Society., 80 (2)
Article
Abstract
Crack profile measurements near the crack tip in the SEM were used to measure crack tip toughness of alumina as a function of grain size (average grain size 0.9-16 mu m). For comparative tests, two crack configurations were included in the present study: straight cracks (CT specimen) loaded with an in situ device; and radial indentation cracks, The measured crack tip toughness values were independent of crack geometry, and no grain size dependence could be discerned. A mean crack tip toughness of 2.3 MPa . m(1/2) was evaluated. The crack tip toughness determined from crack profile measurements is significantly lower than the toughness evaluated with conventional indentation techniques (e.g., indentation strength bending).
| Item Type: | Article |
|---|---|
| Erschienen: | 1997 |
| Creators: | Seidel, Jürgen ; Rödel, Jürgen |
| Type of entry: | Bibliographie |
| Title: | Measurement of crack tip toughness in alumina as a function of grain size |
| Language: | English |
| Date: | February 1997 |
| Journal or Publication Title: | Journal of the American Ceramic Society. |
| Volume of the journal: | 80 |
| Issue Number: | 2 |
| Abstract: | Crack profile measurements near the crack tip in the SEM were used to measure crack tip toughness of alumina as a function of grain size (average grain size 0.9-16 mu m). For comparative tests, two crack configurations were included in the present study: straight cracks (CT specimen) loaded with an in situ device; and radial indentation cracks, The measured crack tip toughness values were independent of crack geometry, and no grain size dependence could be discerned. A mean crack tip toughness of 2.3 MPa . m(1/2) was evaluated. The crack tip toughness determined from crack profile measurements is significantly lower than the toughness evaluated with conventional indentation techniques (e.g., indentation strength bending). |
| Uncontrolled Keywords: | TRANSFORMATION-TOUGHENED ZIRCONIA; POLYCRYSTALLINE ALUMINA; FRACTURE-TOUGHNESS; STRENGTH; CERAMICS; RESISTANCE; DEFLECTION; SPECIMENS; STRESSES; BEHAVIOR |
| Divisions: | 11 Department of Materials and Earth Sciences 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials 11 Department of Materials and Earth Sciences > Department of Earth Sciences (1999 merged into Department of Materials and Earth Sciences) |
| Date Deposited: | 19 Nov 2008 16:04 |
| Last Modified: | 20 Feb 2020 13:30 |
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