Ion-exchanged glass of high surface compression and shallow depth of layer with high resistance to radial crack formation from vickers indentation
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United States of America Patent
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Apr 7, 2020
Grant Date -
Jan 25, 2018
app pub date -
Aug 31, 2017
filing date -
Jul 1, 2011
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Abstract
Disclosed are alkali aluminosilicate glasses having unexpected resistance to indentation cracking. The glasses obtain this high resistance as a result of a high level of surface compression accompanied by a shallow depth of layer. The advantaged glasses show greater resistance to radial crack formation from Vickers indentation than glasses with the same compressive stress, but higher depths of layer.
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