V(z) curves of layered anisotropic materials for the line-focus acoustic microscope

Journal Article · Sun Aug 01 04:00:00 EDT 1993 · Journal of the Acoustical Society of America; (United States)

DOI:https://doi.org/10.1121/1.408194· OSTI ID:5863279

Lee, Y C; Kim, J O; Achenbach, J D ^[1]

---

1. Northwestern Univ., Evanston, IL (United States)

V(z) curves for a line-focus acoustic microscope have been calculated in terms of the characteristic functions of the acoustic lens and the reflectance function of the fluid-loaded specimen. More accurate expressions for the characteristic functions of the acoustic lens are presented by taking account of attenuation in the coupling fluid, the angular dependence of transmission by the antireflection coating on the lens surface, and by making a better estimate of the focal length. The reflectance function has been calculated for anisotropic layers deposited on anisotropic substrates. The calculated V(z) curves have been compared with measurements for isotropic and anisotropic materials, and layered anisotropic materials. The surface acoustic wave velocities obtained from the theoretical and the measured V(z) curves have been compared for the full range of directions of wave propagation. The comparisons of V(z) curves and surface acoustic wave velocities show excellent agreement between theoretical and experimental results. 21 refs., 11 figs., 2 tab.

• DOE Contract Number: FG02-86ER13484
• OSTI ID: 5863279
• Journal Information: Journal of the Acoustical Society of America; (United States), Journal Name: Journal of the Acoustical Society of America; (United States) Vol. 94:2 pt 1; ISSN 0001-4966; ISSN JASMAN
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420500* -- Engineering-- Materials Testing
440800 -- Miscellaneous Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
ACOUSTIC MICROSCOPY
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM
ANISOTROPY
ANTIREFLECTION COATINGS
CHALCOGENIDES
COATINGS
DATA
ELEMENTS
EVALUATION
EXPERIMENTAL DATA
GLASS
INFORMATION
LENSES
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MATHEMATICAL MODELS
METALS
MICROSCOPY
NIOBIUM COMPOUNDS
NIOBIUM NITRIDES
NITRIDES
NITROGEN COMPOUNDS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PNICTIDES
REFRACTORY METAL COMPOUNDS
SEMIMETALS
SILICON
TITANIUM COMPOUNDS
TITANIUM NITRIDES
TRANSITION ELEMENT COMPOUNDS