Elastic properties of TiN/(V sub x Nb sub 1 minus x )N superlattices measured by Brillouin scattering

Journal Article · Fri May 15 04:00:00 EDT 1992 · Journal of Applied Physics; (United States)

DOI:https://doi.org/10.1063/1.350644· OSTI ID:7306423

Mirkarimi, P B; Shinn, M; Barnett, S A ^[1]; Kumar, S; Grimsditch, M ^[2]

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1. Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208 (United States)
2. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)

Brillouin scattering measurements have been carried out on single-crystal lattice-matched TiN/(V{sub 0.6}Nb{sub 0.4})N and mismatched TiN/NbN superlattices. Measured surface wave velocities were found to be independent of superlattice wavelength over the entire range investigated, 1.5--30 nm, and were averages of the measured velocities of pure homogeneous TiN, NbN, and (V{sub 0.6}Nb{sub 0.4})N. These results indicate that there is no anomaly in the {ital C}{sub 44} elastic constant. X-ray diffraction results from the superlattices indicated that the average lattice spacing did not vary with wavelength. This is consistent with previous observations where elastic anomalies were related to changes in lattice spacing. The absence of a correlation between the {ital C}{sub 44} elastic constant and previously reported hardness enhancements indicates that the latter are not caused by anomalies in {ital C}{sub 44}; they could, however, be correlated with other elastic moduli.

• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 7306423
• Journal Information: Journal of Applied Physics; (United States), Journal Name: Journal of Applied Physics; (United States) Vol. 71:10; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
665000 -- Physics of Condensed Matter-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BRILLOUIN EFFECT
COHERENT SCATTERING
DIFFRACTION
ELASTICITY
LATTICE PARAMETERS
MECHANICAL PROPERTIES
NIOBIUM COMPOUNDS
NIOBIUM NITRIDES
NITRIDES
NITROGEN COMPOUNDS
PNICTIDES
REFRACTORY METAL COMPOUNDS
SCATTERING
SOUND WAVES
SUPERLATTICES
TENSILE PROPERTIES
TITANIUM COMPOUNDS
TITANIUM NITRIDES
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS
VANADIUM NITRIDES
X-RAY DIFFRACTION