A Strength-Area Relationship for Diamond

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Abstract
The fracture strength of diamond can be measured by the critical average stress required to produce a ring crack on a diamond surface with a spherical impacter. By using impacters of different sizes and materials, an inverse strengtharea relationship has been established for diamond. This relationship and the similarity between it and that found for glass add to the indications, already reported, of a possible flaw distribution in diamond. Evidence is given that, if such a distribution does exist, it is likely to consist of flaws bigger than point defects.

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