Fracture mirrors in alumina ceramics
- 1 June 1973
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine
- Vol. 27 (6) , 1433-1446
- https://doi.org/10.1080/14786437308226897
Abstract
Fracture mirror radii (r m) of strong, fine-grained alumina ceramics were measured and correlated with the fracture stress (σ f ) to show that the relation σ f rm 1/2 = constant, previously established for glass, applies for alumina ceramics at room temperature and at elevated temperatures. The mirror measurements were used to estimate the residual stresses in quenched alumina rods and to construct a residual stress profile. Using this stress profile and the local stress due to the applied load, the stresses acting to cause fracture at internal flaws in the quenched rods were estimated. These results show that the local stresses causing fracture decrease with increasing relative distance from the rod axis.Keywords
This publication has 11 references indexed in Scilit:
- Strengthening of Hot‐Pressed Al2O3 by QuenchingJournal of the American Ceramic Society, 1973
- Computation of Residual Stresses in Quenched Al2O3Journal of the American Ceramic Society, 1972
- Strengthening Alumina by Quenching in Various MediaJournal of Applied Physics, 1971
- The brittle fracture of alumina below 1000°CPhilosophical Magazine, 1969
- Crack-branchingPhilosophical Magazine, 1967
- Dislocation movement in the brittle fracture of aluminaActa Metallurgica, 1966
- On the shape and size of the fracture zones on glass fracture surfacesPhilosophical Magazine, 1966
- Crack-propagation behaviorsExperimental Mechanics, 1966
- Breaking Stress of Glass Determined from Dimensions of Fracture MirrorsJournal of the American Ceramic Society, 1959
- Effect of Origin Flaw Characteristics on Glass StrengthJournal of Applied Physics, 1958