Wiederhorn, S.
and Krause, R.
(2002),
Crack Growth in Sapphire, Composites, Advanced Ceramics, Materials, and Structures, Annual Conference | 26th | | American Ceramic Society
(Accessed October 14, 2025)
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Crack Growth in Sapphire
Published
Author(s)
,
Abstract
Crack growth was studied in sapphire on both the m-plane and the r-plane (rhombohedral twin plane). Crack growth on the m-plane fit a power law function of stress intensity factor and an Arrhenius function of temperature. Crack growth on r-plane double torsion specimens was irregular. Spurts of growth on the r-plane were mixed with propagation on rough surfaces. Control of crack growth was not possible. Our studies suggest that r-plane fracture requires a lower KI than that on the m-plane. We suggest that propagation on the r-plane may be associated with twinning at the crack tip during or prior to crack growth.Proceedings Title
Composites, Advanced Ceramics, Materials, and Structures, Annual Conference | 26th | | American Ceramic Society
Volume
23
Issue
No. 3
Conference Dates
January 1, 2002
Conference Title
Ceramic Engineering and Science Proceedings
Pub Type
Conferences
Keywords
crack growth, dynamic fatigue fracture, lifetime, sapphire
Citation
Issues
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Created January 1, 2002, Updated February 19, 2017