The Reflectance of the Intermetallic Compounds NiAl and CoAl

D. A. Kiewit, J. O. Brittain, J. Rechtien

The reflectivities at normal incidence of samples of the intermetallic compounds NiAl and CoAl are presented in the photon energy region from 0.5 to 6.0 eV. The data and their interpretation are compared with those of Sambongi, Hagiwara and Yamadaya (J. Phys. Soc. Japan 21 (1966) 923). © 1966, THE PHYSICAL SOCIETY OF JAPAN. All rights reserved.

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Materials
Curve 1
Temperature K: ~298 Wavelength Range, µm: 0.207-1.24 Geometry θ θ' w': ~0° ~0° Composition (weight percent), Specifications and Remarks: CoAl; 50.3 at. % Co; mechanically polished down to 0.05 µ alumina powder; calculated from angular reflectance data.
Curve 1
Temperature K: ~298 Wavelength Range, µm: 0.215-1.65 Geometry θ θ' ω': ~0° ~0° Composition (weight percent), Specifications and Remarks: NiAl; 49.1 at. % Ni; mechanically polished to 0.05 µm alumina; calculated from angular reflectance data.
Curve 2
Temperature K: ~298 Wavelength Range, µm: 0.217-1.61 Geometry θ θ' ω': ~0° ~0° Composition (weight percent), Specifications and Remarks: Similar to above specimen and conditions.
Curve 3
Temperature K: ~298 Wavelength Range, µm: 0.218-1.91 Geometry θ θ' ω': ~0° ~0° Composition (weight percent), Specifications and Remarks: Above specimen and conditions except annealed 20 hrs at 673 K in vacuum (<10⁻⁶ mm Hg).