Properties
The Properties of SilCor® CrN
- Chemical Composition
- Underlayer: Chromium
- Main Layer: Cr, N (optimized ratio), O
- Deposition Technology
- Sputtering (specific method of physical vapor deposition - PVD)
- Deposition temperature: T= 200 oC
- Mechanical Properties
- Coating thickness: 1 - 10 µm, typical thickness 3 µm
- Surface roughness (rms): typical 0,07 µm
- Universal hardness: UH = 24 GPa
- Vickers hardness: HV0.01 = 1900
- Young's modulus: E = 250 GPa
- Elastische Deformation: WE/P = 55 %
- Mechanical stress (tensile): s = - 0,5 GPa
- Coefficient of frication (dry against steel): µ = 0,56
- Specific gravity: rho = 6,1 g/cm3
- Physical and Chemical Properties
- Specific resistivity: 10-2 Ωcm
- Morphology: nanocrystalline, grain size about 20 nm
- Temperature stability: up to 700 oC
- Chemical resistance mainly against acids, leaches, salts and oxidizing media
- De-coating by means of wet-chemistry
- Measurement of mechanical hardness:
- A viewgraph is shown of the load-dependent penetration depth for a Vickers-type diamond with increasing load (green line). After reducing the load to zero (red line - decreasing load) there is still penetration due to a plastic deformation of the coating. From this measurement the macroscopic material parameters can be computed, which are given in the inset for the specific film.
Note: The indicated values refer to measurements of selected, typical sample test specimens. Because of geometric plasma effects the measured characteristics can vary in particular as a function of the size of the substrates. For the exact determination of the coating characteristics the actual coating goods (substrates) of the customer has to be used.