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

Patent metadata

Field	Value
Publication number	US-11377386-B2
Application number	US-202117533506-A
Country	US
Kind code	B2
Filing date	Nov 23, 2021
Priority date	Nov 17, 2017
Publication date	Jul 5, 2022
Grant date	Jul 5, 2022

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:
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 ;
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 % K 2 O; 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.

2. The glass-based article of claim 1 , wherein the glass-based article has a Vicker's crack initiation threshold of at least 1 kgf.

3. The glass-based article of claim 1 , wherein the depth of layer is at least about 10 μm.

4. The glass-based article of claim 1 , wherein the maximum hydrogen concentration is located at the surface of the glass-based article.

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

6. 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 ; and
greater than or equal to 6 mol % to less than or equal to 15 mol % P 2 O 5 .

7. 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 ; and
greater than or equal to 3 mol % to less than or equal to 20 mol % Al 2 O 3 .

8. The glass-based article of claim 1 , wherein the center of the glass-based article comprises:
greater than or equal to 55 mol % to less than or equal to 69 mol % SiO 2 ;
greater than or equal to 5 mol % to less than or equal to 15 mol % Al 2 O 3 ;
greater than or equal to 6 mol % to less than or equal to 10 mol % P 2 O 5 ; and
greater than or equal to 10 mol % to less than or equal to 20 mol % K 2 O.

9. The glass-based article of claim 8 , wherein the center of the glass-based article comprises:
greater than 0 mol % to less than or equal to 10 mol % Cs 2 O; and
greater than 0 mol % to less than or equal to 10 mol % Rb 2 O.

10. The glass-based article of claim 1 , wherein the glass-based article is substantially free of at least one of lithium and sodium.

11. The glass-based article of claim 1 , further comprising a compressive stress layer extending from a surface of the glass-based article into the glass-based article to a depth of compression.

12. The glass-based article of claim 11 , wherein the compressive stress layer comprises a compressive stress of greater than or equal to 100 MPa and the depth of compression is greater than or equal to 75 μm.

13. A glass-based article, comprising:
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 ;
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 % K 2 O;
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.

14. The glass-based article of claim 13 , wherein the depth of layer is at least about 10 μm.

15. The glass-based article of claim 13 , wherein the maximum hydrogen concentration is located at the surface of the glass-based article.

16. The glass-based article of claim 13 , the one or more alkali metal oxides further comprising Cs 2 O and/or 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

• C03C3/083

  containing aluminium oxide or an iron compound · CPC title

• C03B2201/21

  doped with molecular hydrogen · CPC title

• C03C3/085

  containing an oxide of a divalent metal · CPC title