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.
Claims20
A glass article strengthened by water treatment, comprising:
- from greater than or equal to 11 mol % to less than or equal to 25 mol % K2O;
- a surface of the glass article;
- a hydrogen-containing layer extending from the surface into the glass article to a depth of layer, wherein the depth of layer refers to a first depth below the surface where hydrogen concentration matches a hydrogen concentration at a center of the glass article;
- and
- a compressive stress layer from hydrogen species, the compressive stress layer extending from the surface of the glass article into the glass article to a depth of compression, wherein the depth of compression refers to the depth at which stress in the glass article changes from compressive to tensile;
- wherein the depth of layer is greater than 5 μm from the surface;
- and
- wherein the compressive stress layer comprises compressive stress of at least 100 MPa.
A glass article strengthened by water treatment, comprising:
- from greater than or equal to 11 mol % to less than or equal to 25 mol % K2O;
- a surface of the glass article;
- a compressive stress layer from hydrogen species, the compressive stress layer extending from the surface of the glass article into the glass article to a depth of compression, wherein the depth of compression refers to the depth at which stress in the glass article changes from compressive to tensile;
- and
- wherein the compressive stress layer comprises compressive stress of at least 100 MPa.
Dependencies are inferred from the claim text.