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)
Artikel, Bibliographie
Kurzbeschreibung (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).
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 1997 |
| Autor(en): | Seidel, Jürgen ; Rödel, Jürgen |
| Art des Eintrags: | Bibliographie |
| Titel: | Measurement of crack tip toughness in alumina as a function of grain size |
| Sprache: | Englisch |
| Publikationsjahr: | Februar 1997 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the American Ceramic Society. |
| Jahrgang/Volume einer Zeitschrift: | 80 |
| (Heft-)Nummer: | 2 |
| Kurzbeschreibung (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). |
| Freie Schlagworte: | TRANSFORMATION-TOUGHENED ZIRCONIA; POLYCRYSTALLINE ALUMINA; FRACTURE-TOUGHNESS; STRENGTH; CERAMICS; RESISTANCE; DEFLECTION; SPECIMENS; STRESSES; BEHAVIOR |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe 11 Fachbereich Material- und Geowissenschaften > Fachbereich Materialwissenschaft (1999 aufgegangen in 11 Fachbereich Material- und Geowissenschaften) |
| Hinterlegungsdatum: | 19 Nov 2008 16:04 |
| Letzte Änderung: | 20 Feb 2020 13:30 |
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