Laminate articles with moderate adhesion and retained strength
One or more aspects of the disclosure pertain to an article including a film disposed on a glass substrate, which may be strengthened, where the interface between the film and the glass substrate is modified, such that the article has an improved average flexural strength, and the film retains key functional properties for its application. Some key functional properties of the film include optical, electrical and/or mechanical properties. In one or more embodiments, interface exhibits the effective adhesion energy is about less than about 4 J/m 2 . In some embodiments, the interface is modified by the inclusion of a crack mitigating layer between the glass substrate and the film.
1. A laminate article comprising:
a glass substrate having opposing major surfaces and a first average strain-to-failure;
a crack mitigating layer disposed on a first major surface forming a first interface; and
a film comprising chromium disposed on the crack mitigating layer forming a second interface, the film having a second average strain-to-failure that is less than the first average strain-to-failure,
wherein at least one of the first interface and the second interface exhibits a moderate adhesion such that at least a portion of the crack mitigating layer separates from the film or the glass substrate when the article is strained to a strain level between the first average strain-to-failure and the second average strain-to-failure, and
further wherein the crack mitigating layer comprises a plasma-polymerized polymer.
2. The laminate article of claim 1 , wherein the crack mitigating layer has a fracture toughness that is about 50% or less than the fracture toughness of one of the glass substrate and the film.
3. The laminate article of claim 2 , wherein the crack mitigating layer has a fracture toughness of about 1 MPa·m 1/2 or less.
4. The laminate article of claim 1 , wherein the plasma-polymerized polymer comprises one or more of a plasma-polymerized fluoropolymer, a plasma-polymerized hydrocarbon polymer, a plasma-polymerized siloxane polymer and a plasma-polymerized silane polymer.
5. The laminate article of claim 1 , wherein the crack mitigating layer has a thickness of 100 nm or less.
6. The laminate article of claim 1 , wherein the glass substrate has an average flexural strength that is substantially maintained when the crack mitigating layer is disposed on the first major surface and the film is disposed on the crack mitigating layer.
7. The laminate article of claim 1 , wherein the glass substrate is chemically strengthened and has a compressive stress greater than about 500 MPa and a compressive depth-of-layer greater than about 15 μm.
8. A laminate article comprising:
a glass substrate having opposing major surfaces and having a first average strain-to-failure;
a crack mitigating layer disposed on a first major surface forming a first interface; and
a film comprising chromium disposed on the crack mitigating layer forming a second interface, the film having a second average strain-to-failure that is lower than the first average strain-to-failure,
wherein the article exhibits an effective adhesion energy at one or more of the first interface and the second interface of less than about 4 J/m 2 , and
further wherein the crack mitigating layer comprises a plasma-polymerized polymer.
9. The laminate article of claim 8 , wherein the effective adhesion energy is or less than about 0.85 J/m 2 .
10. The laminate article of claim 8 , wherein the crack mitigating layer has a thickness of about 100 nanometers or less.
11. The laminate article of claim 8 , wherein the glass substrate has an average flexural strength that is substantially maintained when the crack mitigating layer is disposed on the first major surface and the film is disposed on the crack mitigating layer.
12. The laminate article of claim 8 , wherein the glass substrate is strengthened and has a compressive stress greater than about 500 MPa and a compressive depth-of-layer greater than about 15 μm.
13. A laminate article comprising:
a glass substrate having opposing major surfaces and having a first average strain-to-failure;
a crack mitigating layer disposed on a first major surface; and
a film comprising chromium disposed on the crack mitigating layer having a second average strain-to-failure that is lower than the first average strain-to-failure,
wherein the crack mitigating layer causes a crack originating in one of the film and the glass substrate and entering into the crack mitigating layer to remain within the crack mitigating layer, and
further wherein the crack mitigating layer comprises a plasma-polymerized polymer.
14. The laminate article of claim 13 , wherein the plasma-polymerized polymer comprises one or more of a plasma-polymerized fluoropolymer, a plasma-polymerized hydrocarbon polymer, a plasma-polymerized siloxane polymer and a plasma-polymerized silane polymer.
15. The laminate article of claim 13 , wherein the glass substrate has an average flexural strength that is substantially maintained when the crack mitigating layer is disposed on the first major surface and the film is disposed on the crack mitigating layer.
16. A laminate article comprising:
a glass substrate having opposing major surfaces and a first average strain-to-failure;
a crack mitigating layer disposed on a first major surface forming a first interface; and
a film comprising indium tin oxide or an aluminum oxynitride disposed on the crack mitigating layer forming a second interface, the film having a second average strain-to-failure that is less than the first average strain-to-failure,
wherein at least one of the first interface and the second interface exhibits a moderate adhesion such that at least a portion of the crack mitigating layer separates from the film or the glass substrate when the article is strained to a strain level between the first average strain-to-failure and the second average strain-to-failure, and
further wherein the crack mitigating layer comprises a nanoporous silica.
17. The laminate article of claim 16 , wherein the crack mitigating layer has a fracture toughness that is about 50% or less than the fracture toughness of one of the glass substrate and the film.
18. The laminate article of claim 17 , wherein the crack mitigating layer has a fracture toughness of about 1 MPa·m 1/2 or less.
19. The laminate article of claim 16 , wherein the crack mitigating layer has a thickness of 100 nm or less.
20. The laminate article of claim 16 , wherein the glass substrate has an average flexural strength that is substantially maintained when the crack mitigating layer is disposed on the first major surface and the film is disposed on the crack mitigating layer.
21. The laminate article of claim 16 , wherein the glass substrate is chemically strengthened and has a compressive stress greater than about 500 MPa and a compressive depth-of-layer greater than about 15 μm.
22. A laminate article comprising:
a glass substrate having opposing major surfaces and having a first average strain-to-failure;
a crack mitigating layer disposed on a first major surface forming a first interface; and
a film comprising indium tin oxide or an aluminum oxynitride disposed on the crack mitigating layer forming a second interface, the film having a second average strain-to-failure that is lower than the first average strain-to-failure,
wherein the article exhibits an effective adhesion energy at one or more of the first interface and the second interface of less than about 4 J/m 2 , and
further wherein the crack mitigating layer comprises a nanoporous silica.
23. The laminate article of claim 22 , wherein the effective adhesion energy is or less than about 0.85 J/m 2 .
24. The laminate article of claim 22 , wherein the crack mitigating layer has a thickness of about 100 nanometers or less.
25. The laminate article of claim 22 , wherein the glass substrate has an average flexural strength that is substantially maintained when the crack mitigating layer is disposed on the first major surface and the film is disposed on the crack mitigating layer.
26. The laminates article of claim 22 , wherein the glass substrate is strengthened and has a compressive stress greater than about 500 MPa and a compressive depth-of-layer greater than about 15 μm.
27. A laminate article comprising:
a glass substrate having opposing major surfaces and having a first average strain-to-failure;
a crack mitigating layer disposed on a first major surface; and
a film comprising indium tin oxide or an aluminum oxynitride disposed on the crack mitigating layer having a second average strain-to-failure that is lower than the first average strain-to-failure,
wherein the crack mitigating layer causes a crack originating in one of the film and the glass substrate and entering into the crack mitigating layer to remain within the crack mitigating layer, and
further wherein the crack mitigating layer comprises a nanoporous silica.
28. The laminate article of claim 27 , wherein the plasma-polymerized polymer comprises one or more of a plasma-polymerized fluoropolymer, a plasma-polymerized hydrocarbon polymer, a plasma-polymerized siloxane polymer and a plasma-polymerized silane polymer.
29. The laminate article of claim 27 , wherein the glass substrate has an average flexural strength that is substantially maintained when the crack mitigating layer is disposed on the first major surface and the film is disposed on the crack mitigating layer.