Heat treatable coated article with diamond-like carbon (DLC) and/or zirconium in coating
View Patent ↗In certain example embodiments, a coated article includes respective layers including diamond-like carbon (DLC) and zirconium nitride before heat treatment (HT). During HT, the hydrogenated DLC acts as a fuel which upon combustion with oxygen produces carbon dioxide and/or water. The high temperature developed during this combustion heats the zirconium nitride to a temperature(s) well above the heat treating temperature, thereby causing the zirconium nitride to be transformed into a new post-HT layer including zirconium oxide that is scratch resistant and durable.
1. A thermally tempered coated article including a coating supported by a glass substrate, the coating comprising:
an outermost layer comprising nanocrystalline zirconium oxide comprising cubic lattice structure, wherein the layer comprising nanocrystalline zirconium oxide is the outermost layer of the thermally tempered coated article comprising the glass substrate and the layer comprising nanocrystalline zirconium oxide; and
wherein the layer comprising nanocrystalline zirconium oxide further comprises from 0.25 to 20% carbon (atomic %).
2. The thermally tempered coated article of claim 1 , further comprising a layer comprising carbon between the layer comprising zirconium oxide and the substrate.
3. The thermally tempered coated article of claim 1 , wherein the layer comprising zirconium oxide further includes from 1-5% ntrogen.
4. The thermally tempered coated article of claim 1 , wherein the coated article has a visible transmission of at least 75% and a critical scratch load using an alumina sphere of at least about 20 lbs.
5. The thermally tempered coated article of claim 1 wherein the coated article has a critical scratch load using an alumina sphere of at least about 22.5 lbs.
6. The thermally tempered coated article of claim 1 wherein the coated article has a critical scratch load using an alumina sphere of at least about 30 lbs.
7. The thermally tempered coated article of claim 1 , wherein the layer comprising zirconium oxide comprises from 0.25 to 10% carbon.
8. The thermally tempered coated article of claim 1 , wherein the layer comprising zirconium oxide comprises from 0.25 to 5% carbon.
9. The thermally tempered coated article of claim 1 , wherein the layer comprising nanocrystalline zirconium oxide is graded as to carbon content, so that carbon content in the layer comprising nanocrystalline zirconium oxide is graded.