Water-containing glass-based articles with high indentation cracking threshold

Patent metadata

Field	Value
Publication number	US-11760685-B2
Application number	US-202217899717-A
Country	US
Kind code	B2
Filing date	Aug 31, 2022
Priority date	Nov 17, 2017
Publication date	Sep 19, 2023
Grant date	Sep 19, 2023

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.

First claim

What is claimed is:

1. A glass-based article, comprising:
a hydrogen-containing layer extending from a surface of the glass-based article to a depth of layer;
a compressive stress layer extending from the surface of the glass-based article to a depth of compression,
wherein the compressive stress layer comprises a compressive stress greater than or equal to 100 MPa;
wherein a center of the glass-based article comprises:
SiO 2 ;
Al 2 O 3 ;
greater than or equal to 4 mol % to less than or equal to 15 mol % P 2 O 5 ;
greater than or equal to 6 mol % to less than or equal to 25 mol % K 2 O.

2. The glass-based article of claim 1 , further comprising at least one of Na 2 O, Cs 2 O, and Rb 2 O.

3. The glass-based article of claim 1 , wherein a maximum hydrogen concentration is located at the surface of the glass-based article, and wherein a hydrogen concentration of the hydrogen-containing layer decreases from the maximum hydrogen concentration to the depth of layer.

4. The glass-based article of claim 1 , wherein the center of the glass-based article comprises:
greater than or equal to 45 mol % to less than or equal to 75 mol % SiO 2 ;
greater than or equal to 3 mol % to less than or equal to 20 mol % Al 2 O 3 ;
greater than or equal to 4 mol % to less than or equal to 15 mol % P 2 O 5 ; and
greater than or equal to 11 mol % to less than or equal to 25 mol % K 2 O.

5. The glass-based article of claim 4 , wherein the center of the glass-based article comprises:
greater than or equal to 0 mol % to less than or equal to 10 mol % Cs 2 O; and
greater than or equal to 0 mol % to less than or equal to 10 mol % Rb 2 O.

6. The glass-based article of claim 5 , wherein the glass-based article is substantially free of lithium such that the lithium is less than 0.01 mol %.

7. The glass-based article of claim 1 , wherein the depth of compression is greater than or equal to 75 μm, and wherein the depth of layer is at greater than 5 μm.

8. The glass-based article of claim 1 , wherein the depth of compression is greater than or equal to 0.05t, where t is thickness of the glass-based article.

9. The glass-based article of claim 8 , having a thickness of less than 2 mm.

10. A consumer electronic product, comprising:
a housing comprising a front surface, a back surface and side surfaces;
electrical components at least partially within the housing, the electrical components comprising at least a controller, a memory, and a display, the display at or adjacent the front surface of the housing; and
a cover substrate disposed over the display,
wherein at least a portion of at least one of the housing or the cover substrate comprises the glass-based article of claim 9 .

11. A glass-based article, comprising:
a hydrogen-containing layer extending from a surface of the glass-based article to a depth of layer, wherein the depth of layer is at greater than 5 μm; and
a compressive stress layer extending from the surface of the glass-based article to a depth of compression, wherein the compressive stress layer comprises a compressive stress greater than or equal to 100 MPa, and wherein the depth of compression is greater than or equal to 75 μm,
wherein a center of the glass-based article comprises:
SiO 2 ;
Al 2 O 3 ;
greater than or equal to 4 mol % to less than or equal to 15 mol % P 2 O 5 ;
greater than or equal to 6 mol % to less than or equal to 25 mol % R 2 O, wherein the R 2 O is the sum of alkali metal oxides, and wherein the R 2 O comprises greater than or equal to 6 mol % and less than or equal to 25 mol % of K 2 O.

12. The glass-based article of claim 11 , wherein the R 2 O is further comprising at least one of Na 2 O, Cs 2 O, and Rb 2 O.

13. The glass-based article of claim 11 , wherein a maximum hydrogen concentration is located at the surface of the glass-based article, and wherein a hydrogen concentration of the hydrogen-containing layer decreases from the maximum hydrogen concentration to the depth of layer.

14. The glass-based article of claim 11 , wherein the center of the glass-based article comprises:
greater than or equal to 45 mol % to less than or equal to 75 mol % SiO 2 ;
greater than or equal to 3 mol % to less than or equal to 20 mol % Al 2 O 3 ;
greater than or equal to 4 mol % to less than or equal to 15 mol % P 2 O 5 ; and
greater than or equal to 11 mol % to less than or equal to 25 mol % K 2 O R 2 O.

15. The glass-based article of claim 11 , wherein the depth of compression is greater than or equal to 0.05t, where t is thickness of the glass-based article.

16. The glass-based article of claim 15 , wherein the thickness is less than 2 mm.

17. A glass-based article, comprising:
a hydrogen-containing layer extending from a surface of the glass-based article to a depth of layer, wherein a hydrogen concentration of the hydrogen-containing layer decreases from a maximum hydrogen concentration to the depth of layer, wherein the depth of layer is greater than 5 μm; and
a compressive stress layer extending from the surface of the glass-based article to a depth of compression, wherein the compressive stress layer comprises a compressive stress greater than or equal to 100 MPa, wherein the depth of compression is greater than or equal to 75 μm;
wherein a center of the glass-based article comprises:
SiO 2 ;
Al 2 O 3 ;
greater than or equal to 4 mol % to less than or equal to 15 mol % P 2 O 5 ; and
alkali metal oxides having alkali metal ions with an ionic radius of 0.133 nm or larger, wherein the alkali metal oxides comprise greater than or equal to 6 mol % to less than or equal to 25 mol % K 2 O.

18. The glass-based article of claim 17 , further comprising at least one of Na 2 O, Cs 2 O, and Rb 2 O.

Assignees

• Corning Inc

Inventors

• Gross Timothy Michael
• Guryanov Georgiy M

Classifications

• C03C3/097 Primary

  containing phosphorus, niobium or tantalum · CPC title

• C03C21/007 Primary

  in gaseous phase · CPC title

• C03C3/105 Primary

  containing aluminium · CPC title

• C03C21/002

  to perform ion-exchange between alkali ions (C03C21/005 takes precedence) · CPC title

• C03C3/083

  containing aluminium oxide or an iron compound · CPC title