Effect of temperature on the fracture of sapphire
- 1 October 1973
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine
- Vol. 28 (4), 783-796
- https://doi.org/10.1080/14786437308220983
Abstract
At low temperatures, metastable crack growth dictates the environment free strength of sapphire. Plastic deformation by dislocation motion or twin formation and growth plays no role in the fracture process at temperatures below 400° C. These conclusions are supported both by crack growth studies and critical stress intensity factor measurements on sapphire crystals, and by transmission electron microscopy studies of arrested cracks in sapphire and alumina.Keywords
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