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Structure of nickel layers in ni-C multilayer coatings: influence of annealing.

Journal of X-ray science and technology (1992-01-01)
G E van Dorssen, E J Puik, M J van der Wiel, P Mackle, H A Padmore, I H Munro
ABSTRACT

The structure of Ni-C multilayer and single nickel layer samples has been analyzed before and after annealing, using two techniques: fluorescence EXAFS (F1EXAFS) at the Ni-K. edge and CuKα reflection. Annealing at a temperature of 450°C resulted in a change in the structure of the nickel layers from amorphous like to crystalline like. A reduction of the Bragg reflectivity by a factor of 7 was also found. Comparison between the EXAFS data of the annealed sample and of a nickel foil show a difference in the amplitude of the EXAFS. This is ascribed to a non-Gaussian atomic distribution of the backscattering atoms in the annealed sample around their average positions, whereas the atomic distribution in the (polycrystalline) Ni foil is a Gaussian one. From the annealing experiments we conclude that no irreversible changes take place in the structure of the nickel layers at temperatures below 200°C.

MATERIALS
Product Number
Brand
Product Description

Nickel, foil, 50x50mm, thickness 0.30mm, as rolled, 99.98%
Nickel, foil, light tested, 100x100mm, thickness 0.015mm, 99.9%
Nickel, foil, 10mm disks, thickness 0.15mm, annealed, 99%
Nickel, foil, 4mm disks, thickness 0.075mm, annealed, 99%
Nickel, foil, 4mm disks, thickness 0.075mm, as rolled, 99.98%
Nickel, foil, 4mm disks, thickness 0.125mm, annealed, 99%
Nickel, foil, 4mm disks, thickness 0.125mm, annealed, 99.98%
Nickel, foil, 4mm disks, thickness 0.125mm, as rolled, 100%
Nickel, foil, 4mm disks, thickness 0.125mm, as rolled, 99.99+%
Nickel, foil, 4mm disks, thickness 0.15mm, annealed, 99%
Nickel, foil, 4mm disks, thickness 0.1mm, annealed, 99%
Nickel, foil, 4mm disks, thickness 0.20mm, annealed, 99%
Nickel, foil, 4mm disks, thickness 0.25mm, annealed, 99%
Nickel, foil, 4mm disks, thickness 0.25mm, annealed, 99.98%
Nickel, foil, 4mm disks, thickness 0.25mm, as rolled, 100%
Nickel, foil, 4mm disks, thickness 0.25mm, as rolled, 99.99+%
Nickel, foil, 4mm disks, thickness 0.30mm, as rolled, 99.98%
Nickel, foil, 4mm disks, thickness 0.3mm, annealed, 99%
Nickel, foil, 4mm disks, thickness 0.3mm, as rolled, 100%
Nickel, foil, 4mm disks, thickness 0.50mm, annealed, 99%
Nickel, foil, 4mm disks, thickness 0.5mm, annealed, 99.98%
Nickel, foil, 4mm disks, thickness 0.5mm, as rolled, 100%
Nickel, foil, 4mm disks, thickness 0.5mm, as rolled, 99.99+%
Nickel, foil, 50mm disks, thickness 0.0025mm, 99.95%
Nickel, foil, 50mm disks, thickness 0.003mm, 99.95%
Nickel, foil, 50mm disks, thickness 0.005mm, as rolled, 99.9%
Nickel, foil, 50mm disks, thickness 0.0075mm, 99.9%
Nickel, foil, 50mm disks, thickness 0.0075mm, 99.95%
Nickel, foil, 50mm disks, thickness 0.0125mm, 99.9%
Nickel, foil, 50mm disks, thickness 0.0125mm, 99.99+%

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