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Measurement of crack tip toughness in alumina as a function of grain size

Seidel, Jürgen ; Rödel, Jürgen :
Measurement of crack tip toughness in alumina as a function of grain size.
In: Journal of the American Ceramic Society., 80 (2) pp. 433-438.
[Artikel], (1997)

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
Titel: Measurement of crack tip toughness in alumina as a function of grain size
Sprache: Englisch
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).

Titel der Zeitschrift, Zeitung oder Schriftenreihe: Journal of the American Ceramic Society.
Band: 80
(Heft-)Nummer: 2
Freie Schlagworte: TRANSFORMATION-TOUGHENED ZIRCONIA; POLYCRYSTALLINE ALUMINA; FRACTURE-TOUGHNESS; STRENGTH; CERAMICS; RESISTANCE; DEFLECTION; SPECIMENS; STRESSES; BEHAVIOR
Fachbereich(e)/-gebiet(e): Fachbereich Material- und Geowissenschaften > Materialwissenschaften > Nichtmetallisch-Anorganische Werkstoffe
FB Materialwissenschaft (aufgegangen in FB11)
Fachbereich Material- und Geowissenschaften > Materialwissenschaften
Fachbereich Material- und Geowissenschaften
Hinterlegungsdatum: 19 Nov 2008 16:04
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