Water-containing glass-based articles with high indentation cracking threshold
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.
1. A method of manufacturing a glass-based article, comprising:
substituting in monovalent hydrogen species for ions with an ionic radius of 0.133 nm or larger to form a hydrogen-containing layer of the glass-based article, wherein the hydrogen-containing layer extends from a surface of the glass-based article to the depth of layer, and hydrogen concentration of the hydrogen-containing layer decreases from a maximum hydrogen concentration to a depth of layer;
wherein the depth of layer is greater than 5 μm; and
wherein 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
greater than or equal to 6 mol % to less than or equal to 25 mol % K 2 O.
2. The method of claim 1 , wherein the glass-based article has a Vicker's crack initiation threshold of at least 1 kgf.
3. The method of claim 1 , wherein the depth of layer is at least about 10 μm.
4. The method of claim 1 , wherein the maximum hydrogen concentration is located at the surface of the glass-based article.
5. The method of claim 1 , further comprising at least one of Li 2 O, Na 2 O, Cs 2 O, and Rb 2 O.
6. The method 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 method 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 method 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 method 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 method of claim 1 , wherein the glass-based article is substantially free of at least one of lithium and sodium.
11. The method 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 method 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 method of manufacturing a glass-based article, comprising:
substituting in monovalent hydrogen species for ions with an ionic radius of 0.133 nm or larger to form a hydrogen-containing layer of the glass-based article, wherein the hydrogen-containing layer extends from a surface of the glass-based article to the depth of layer, and hydrogen concentration of the hydrogen-containing layer decreases from a maximum hydrogen concentration to a depth of layer;
wherein the depth of layer is greater than 5 μm;
wherein a portion of the glass-based article is in compressive stress of greater than or equal to 100 MPa; and
wherein 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 6 mol % to less than or equal to 25 mol % K 2 O.
14. The method of claim 13 , wherein the depth of layer is at least about 10 μm.
15. The method of claim 13 , wherein the maximum hydrogen concentration is located at the surface of the glass-based article.
16. The method of claim 13 , the one or more alkali metal oxides further comprising Cs 2 O and/or Rb 2 O.