Glass or glass-ceramic article coated with hard material and method for production thereof
First Claim
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1. A glass or glass-ceramic article coated with hard material having a glass substrate or a glass-ceramic substrate, comprising:
- a silicon nitride layer is deposited on the substrate as a hard-material layer, wherein the silicon nitride layer has an x-ray amorphous morphology in the volume, and has a structure-free morphology such that it appears structure-free in an electron micrograph of the cross section with 5 kV accelerating voltage at 100,000×
magnification.
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Abstract
The object of the invention is to create a hard-material coating for glass ceramics and glasses, a coating which is particularly temperature-resistant and protects the substrate from mechanically caused damage as well as chemical attack. For this purpose, a silicon nitride coating is proposed, which has a structure-free morphology in the volume.
66 Citations
23 Claims
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1. A glass or glass-ceramic article coated with hard material having a glass substrate or a glass-ceramic substrate, comprising:
a silicon nitride layer is deposited on the substrate as a hard-material layer, wherein the silicon nitride layer has an x-ray amorphous morphology in the volume, and has a structure-free morphology such that it appears structure-free in an electron micrograph of the cross section with 5 kV accelerating voltage at 100,000×
magnification.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A glass or glass-ceramic article coated with hard material having a glass substrate or a glass-ceramic substrate, comprising:
a silicon nitride layer deposited by sputtering at a power of more than 10 watts per cm2 of target surface on the substrate as a hard-material layer with a layer thickness of at least 1 μ
m and a Vickers hardness of more than 2000 HV, wherein the silicon nitride layer has an x-ray amorphous morphology in the volume, and has a structure-free morphology such that it appears structure-free in an electron micrograph of the cross section with 5 kV accelerating voltage at 100,000×
magnification.- View Dependent Claims (22, 23)
Specification