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US 11,377,386 B2Granted
Water-containing glass-based articles with high indentation cracking threshold
AssigneeCorning Incorporated
InventorsTimothy Michael Gross, Georgiy M Guryanov
Life of this patent
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Abstract
Glass-based articles that include a hydrogen-containing layer extending from the surface of the article to a depth of layer. The hydrogen-containing layer includes a hydrogen concentration that decreases from a maximum hydrogen concentration to the depth of layer. The glass-based articles exhibit a high Vickers indentation cracking threshold. Glass compositions that are selected to promote the formation of the hydrogen-containing layer and methods of forming the glass-based article are also provided.
Claims16
A glass-based article, comprising:
- SiO2;
- Al2O3;
- greater than or equal to 4 mol % to less than or equal to 15 mol % P2O5;
- one or more alkali metal oxides having alkali metal ions with an ionic radius of 0.133 nm or larger, wherein the one or more alkali metal oxides comprise greater than or equal to 6 mol % to less than or equal to 25 mol % K2O;
- and
- a hydrogen-containing layer extending from a surface of the glass-based article to a depth of layer,
- wherein monovalent hydrogen species in the hydrogen-containing layer substitute for a portion of ions with an ionic radius of 0.133 nm or larger such that a hydrogen concentration of the hydrogen-containing layer decreases from a maximum hydrogen concentration to the depth of layer, and
- wherein the depth of layer is greater than 5 μm.
5 more elements
A glass-based article, comprising:
- greater than or equal to 45 mol % to less than or equal to 75 mol % SiO2;
- greater than or equal to 3 mol % to less than or equal to 20 mol % Al2O3;
- greater than or equal to 4 mol % to less than or equal to 15 mol % P2O5;
- one or more alkali metal oxides having alkali metal ions with an ionic radius of 0.133 nm or larger, wherein the one or more alkali metal oxides comprise greater than or equal to 6 mol % to less than or equal to 25 mol % K2O;
- a hydrogen-containing layer extending from a surface of the glass-based article to a depth of layer, wherein monovalent hydrogen species in the hydrogen-containing layer substitute for a portion of ions with an ionic radius of 0.133 nm or larger such that a hydrogen concentration of the hydrogen-containing layer decreases from a maximum hydrogen concentration to the depth of layer, and wherein the depth of layer is greater than 5 μm;
- and
- a portion of the glass-based article in compressive stress of greater than or equal to 100 MPa.
4 more elements
Dependencies are inferred from the claim text.