Diffraction Corrections for Ultrasonic Attenuation and Velocity Measurements in Crystals
نویسندگان
چکیده
منابع مشابه
Computer Signal Processing for Ultrasonic Attenuation and Velocity Measurements for Material Property Characterizations
This report deals with instrumentation and computer programming concepts that have been developed for altrasonic materials characterization. Methods that facilitate velocity and attenuation measurements are described. The apparatus V described is based on a broadband, nuffereu contact prone ° using a pulse-echo approach for simultaneously measuring CL velocity and attenuation. Instrumentation, ...
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Sound attenuation and velocity in nickel single crystals have been studied as function of frequency (10 to 250 MHz), temperature, strength and direction of external magnetic field along , (110> and , for the three pure wave modes propagating along . The observed effects are found to be specific for each combination of sound mode and field direction, and especially interesting for...
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Ultrasonic attenuation in crystals of ice Ih has been measured as functions of frequency (15 a 85 MHz) and temperature ( 8°C a O.l°C). Data were analyzed on the basis of vibrating string model of dislocation, and the following results have been obtained: Density of dislocations is on the order of 106 cm-*; pinning of dislocations may be due to impurity ions; dislocation density severely fluctua...
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ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1965
ISSN: 0001-4966
DOI: 10.1121/1.1939745