Glass with improved drop performance
Glass-based articles are provided that exhibit improved drop performance. The relationship between properties attributable to the glass composition and stress profile of the glass-based articles are provided that indicate improved drop performance.
1. A glass-based article, comprising:
a compressive stress layer extending from a surface of the glass-based article to a depth of compression,
wherein K IC 2 ×DOC/t×√{square root over (STE)}≥9.0×10 11 Pa 2.5 m 1.5 where K IC is the fracture toughness in Pa·m 0.5 of a glass-based substrate having a composition and phase assemblage equivalent to the composition and phase assemblage at the center of the glass-based article, DOC is the depth of compression in meters, t is the thickness of the glass-based article in meters, and STE is the stored strain energy of the glass-based article in Pa·m.
2. The glass-based article of claim 1 , wherein 75 μm≤DOC≤300 μm.
3. The glass-based article of claim 1 , comprising a maximum central tension CT less than or equal to 120/√{square root over (t)} MPa, where t is in mm.
4. The glass-based article of claim 1 , wherein the glass-based article has a thickness t≤1.0 mm.
5. The glass-based article of claim 1 , wherein STE≥20 Pa·m.
6. The glass-based article of claim 1 , wherein 5 Pa·m≤STE≤10 Pa·m.
7. The glass-based article of claim 1 , wherein the compressive stress layer comprises a compressive stress CS of greater than or equal to 100 MPa to less than or equal to 1300 MPa.
8. The glass-based article of claim 1 , wherein a glass-based substrate having a composition and phase assemblage equivalent to the composition and phase assemblage at the center of the glass-based article has at least one of:
a K IC greater than or equal to 0.75 MPa√{square root over (m)} to less than or equal to 1.5 MPa√{square root over (m)}
a hardness H greater than or equal to 6.0 GPa to less than or equal to 8.0 GPa, and
a Young's modulus E greater than or equal to 80 GPa to less than or equal to 120 GPa.
9. A glass-based article, comprising:
a compressive stress layer extending from a surface of the glass-based article to a depth of compression,
wherein K IC 2 ×DOC×√{square root over (STE)}≥5.6×10 8 Pa 2.5 m 2.5 where K IC is the fracture toughness in Pa·m 0.5 of a glass-based substrate having a composition and phase assemblage equivalent to the composition and phase assemblage at the center of the glass-based article, DOC is the depth of compression in meters, t is the thickness of the glass-based article in meters, and STE is the stored strain energy of the glass-based article in Pa·m.
10. The glass-based article of claim 9 , wherein 75 μm≤DOC≤300 μm.
11. The glass-based article of claim 9 , comprising a maximum central tension CT greater than or equal to 95 MPa.
12. The glass-based article of claim 9 , wherein the glass-based article has a thickness t≤1.0 mm.
13. The glass-based article of claim 9 , wherein STE≥20 Pa·m.
14. The glass-based article of claim 9 , wherein 5 Pa·m≤STE≤10 Pa·m.
15. The glass-based article of claim 9 , wherein the compressive stress layer comprises a compressive stress CS of greater than or equal to 100 MPa to less than or equal to 1300 MPa.
16. The glass-based article of claim 9 , wherein a glass-based substrate having a composition and phase assemblage equivalent to the composition and phase assemblage at the center of the glass-based article has at least one of:
a K IC greater than or equal to 0.75 MPa√{square root over (m)} to less than or equal to 1.5 MPa√{square root over (m)}
a hardness H greater than or equal to 6.0 GPa to less than or equal to 8.0 GPa, and
a Young's modulus E greater than or equal to 80 GPa to less than or equal to 120 GPa.
17. A glass-based article, comprising:
a compressive stress layer extending from a surface of the glass-based article to a depth of compression,
wherein K IC 2 ×DOC×H/E×√{square root over (STE)}≥4.1×10 7 Pa 2.5 m 2.5 where K IC is the fracture toughness in Pa·m 0.5 of a glass-based substrate having a composition and phase assemblage equivalent to the composition and phase assemblage at the center of the glass-based article, DOC is the depth of compression in meters, H is the hardness in Pascals of a glass-based substrate having a composition and phase assemblage equivalent to the composition at the center of the glass-based article, E is the Young's modulus in Pascals of a glass-based substrate having a composition and phase assemblage equivalent to the composition and phase assemblage at the center of the glass-based article, and STE is the stored strain energy of the glass-based article in Pa·m.
18. The glass-based article of claim 17 , wherein 75 μm≤DOC≤300 μm.
19. The glass-based article of claim 17 , comprising a maximum central tension CT greater than or equal to 95 MPa.
20. The glass-based article of claim 17 , wherein the glass-based article has a thickness t≤1.0 mm.
21. The glass-based article of claim 17 , wherein STE≥20 Pa·m.
22. The glass-based article of claim 17 , wherein 5 Pa·m≤STE≤10 Pa·m.
23. The glass-based article of claim 17 , wherein the compressive stress layer comprises a compressive stress CS of greater than or equal to 100 MPa to less than or equal to 1300 MPa.
24. The glass-based article of claim 17 , wherein a glass-based substrate having a composition and phase assemblage equivalent to the composition and phase assemblage at the center of the glass-based article has at least one of:
a K IC greater than or equal to 0.75 MPa√{square root over (m)} to less than or equal to 1.5 MPa√{square root over (m)}
a hardness H greater than or equal to 6.0 GPa to less than or equal to 8.0 GPa, and
a Young's modulus E greater than or equal to 80 GPa to less than or equal to 120 GPa.
25. A method, comprising:
ion exchanging a glass-based substrate to form a glass-based article having a compressive stress layer extending from a surface of the glass-based article to a depth of compression,
wherein K IC 2 ×DOC/t×√{square root over (STE)}≥7.0×10 11 Pa 2.5 m 1.5 where K IC is the fracture toughness in Pa·m 0.5 of the glass-based substrate, DOC is the depth of compression in meters, t is the thickness of the glass-based article in meters, and STE is the stored strain energy of the glass-based article in Pa·m.
26. A method, comprising:
ion exchanging a glass-based substrate to form a glass-based article having a compressive stress layer extending from a surface of the glass-based article to a depth of compression,
wherein K IC 2 ×DOC×H/E×√{square root over (STE)}≥4.1×10 7 Pa 2.5 m 2.5 where K IC is the fracture toughness in Pa·m 0.5 of the glass-based substrate, DOC is the depth of compression in meters, H is the hardness in Pascals of the glass-based substrate, E is the Young's modulus in Pascals of the glass-based substrate, and STE is the stored strain energy of the glass-based article in Pa·m.
27. A consumer electronic product, comprising:
a housing having a front surface, a back surface and side surfaces;
electrical components provided at least partially within the housing, the electrical components including at least a controller, a memory, and a display, the display being provided at or adjacent the front surface of the housing; and
a cover glass disposed over the display,
wherein at least one of a portion of the housing or a portion of the cover glass comprises the glass-based article of claim 1 .
28. A consumer electronic product, comprising:
a housing having a front surface, a back surface and side surfaces;
electrical components provided at least partially within the housing, the electrical components including at least a controller, a memory, and a display, the display being provided at or adjacent the front surface of the housing; and
a cover glass disposed over the display,
wherein at least one of a portion of the housing or a portion of the cover glass comprises the glass-based article of claim 9 .
29. A consumer electronic product, comprising:
a housing having a front surface, a back surface and side surfaces;
electrical components provided at least partially within the housing, the electrical components including at least a controller, a memory, and a display, the display being provided at or adjacent the front surface of the housing; and
a cover glass disposed over the display,
wherein at least one of a portion of the housing or a portion of the cover glass comprises the glass-based article of claim 17 .