Glass-based articles with improved fracture resistance
Glass-based articles are provided that exhibit improved fracture resistance. The relationships between properties attributable to the glass composition and stress profile of the glass-based articles are provided that indicate improved fracture resistance.
1. A glass-based article, comprising:
a first surface;
a second surface; and
a stress profile having a first compressive region extending from a first surface to a first depth of compression DOC 1 , a second compressive region extending from a second surface to a second depth of compression DOC 2 , and a tensile region extending from DOC 1 to DOC 2 ,
wherein the tensile region has a tensile stress factor K T greater than or equal to 1.31 MPa·√(m) and less than 1.8·K IC , wherein K IC is the fracture toughness of a glass-based substrate having the same composition as the center of the glass-based article.
2. The glass-based article of claim 1 , wherein K T is greater than or equal to 1.41 MPa·√(m).
3. The glass-based article of claim 1 , wherein K T is less than or equal to 1.781·√K IC .
4. The glass-based article of claim 1 , wherein K IC is greater than or equal to 1.3 MPa·√(m).
5. The glass-based article of claim 1 , wherein DOC 1 =DOC 2 , as measured from the first and second surfaces, respectively.
6. The glass-based article of claim 1 , wherein the glass-based article is non-frangible.
7. 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 a portion of at least one of the housing or the cover substrate comprises the glass-based article of claim 1 .
8. A glass-based article:
a surface; and
a stress profile having a compressive region extending from a surface to a depth of compression DOC, and a tensile region,
wherein the tensile region has a tensile stress factor K T greater than or equal to 1.31 MPa·√(m) and less than or equal to K limit T , where K limit T is defined by:
K
T
limit
=
1.716
·
K
IC
1
+
2.263
DOC
t
wherein K IC is the fracture toughness of a glass-based substrate having the same composition as the center of the glass-based article, and t is the thickness of the glass-based article.
9. The glass-based article of claim 8 , wherein K T is greater than or equal to 1.41 MPa·√(m).
10. The glass-based article of claim 8 , wherein
DOC
t
is greater than 0.12.
11. The glass-based article of claim 8 , wherein K IC is greater than or equal to 0.67 MPa·√(m).
12. The glass-based article of claim 8 , wherein the glass-based article is non-frangible.
13. 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 a portion of at least one of the housing or the cover substrate comprises the glass-based article of claim 8 .
14. A glass-based article, comprising:
a first surface;
a second surface; and
a stress profile having a first compressive region extending from a first surface to a first depth of compression DOC 1 , a second compressive region extending from a second surface to a second depth of compression DOC 2 , and a tensile region extending from DOC 1 to DOC 2 ,
wherein the tensile region has a tensile stress factor KT greater than or equal to 1.31 MPa·√(m) and less than or equal to K limit T , where K limit t is defined by:
K
T
limit
=
2.504
·
K
IC
1
-
0.531
DOC
1
-
DOC
2
t
wherein K IC is the fracture toughness of a glass-based substrate having the same composition as the center of the glass-based article, t is the thickness of the glass-based article, and the DOC 1 and the DOC 2 are measured from the first surface.
15. The glass-based article of claim 14 , wherein K T is greater than or equal to 1.41 MPa·√(m).
16. The glass-based article of claim 14 , wherein K T is less than or equal to 0.95·K limit T .
17. The glass-based article of claim 14 , wherein K IC is greater than or equal to 0.67 MPa·√(m).
18. The glass-based article of claim 14 , wherein DOC 1 =t-DOC 2 .
19. The glass-based article of claim 14 , wherein the glass-based article is non-frangible.
20. 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 a portion of at least one of the housing or the cover substrate comprises the glass-based article of claim 14 .
21. A glass-based article, comprising:
a surface; and
a stress profile having a compressive region extending from a surface to a depth of compression DOC, and a tensile region,
wherein the compressive region has a compressive-stress factor K CS , the tensile region has a tensile stress factor K T greater than or equal to 1.31 MPa·√(m), and:
K
T
2
K
I
C
2
+
1
28.5
K
C
S
2
K
I
C
2
≤
4.45
wherein K IC is the fracture toughness of a glass-based substrate having the same composition as the center of the glass-based article.
22. The glass-based article of claim 21 , wherein:
K
T
2
K
I
C
2
+
1
28.5
K
C
2
K
I
C
2
≤
4.1
.
23. The glass-based article of claim 21 , wherein K T is greater than or equal to 1.41 MPa·√(m).
24. The glass-based article of claim 21 , wherein the glass-based article is non-frangible.
25. 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 a portion of at least one of the housing or the cover substrate comprises the glass-based article of claim 21 .