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Showing 1 to 9 of 9 for “"ultrasonic study"”.
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An Ultrasonic Study of Creep in Sodium-Chloride
Made available in DSpace on 2015-05-12T21:41:56Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7020950.PDF: 3233028 bytes, checksum: 4b8e5a3bbc41fb410fb283352783ca6d (MD5) Previous issue date: 1970
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An ultrasonic study of trapped hydrogen in niobium
… of the model. Measurements have been made of ultrasonic attenuation and velocity in the Nb-O-H system as a function of temperature, frequency, polarization and isotope. In addition to the previously found stable peak, an additional peak is found when the specimen is cooled rapidly. The peak …
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A Low-Temperature Ultrasonic Study of Hydrogen in Niobium
Made available in DSpace on 2015-05-13T15:22:16Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7915413.PDF: 3824513 bytes, checksum: 966ccacbe6a5f2a9c4341d365a30bee0 (MD5) Previous issue date: 1979
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An Ultrasonic Study of Trapped Hydrogen Tunneling Systems in Niobium and Tantalum
… H in Ta, and D in Nb have been studied with ultrasonic techniques at low temperature. Attenuation due to H in Ta was measured between 0.5 K and 10 K for frequencies between 10 MHz and 55 MHz. The sound velocity change due to H in Nb was measured in both the normal and superconducting state at …
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An ultrasonic study of point defects in electron-irradiated P-type silicon
The mechanisms of interaction of ultrasonic waves with point defects in crystals are reviewed and a perturbation approach is introduced which leads to general expressions for the resonance and relaxation strengths in terms of matrix elements of the ultrasonic perturbation. These expressions provide …
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An ultrasonic study of trapped hydrogen tunneling systems in Nb and Ta
… H in Ta, and D in Nb have been studied with ultrasonic techniques at low temperature. Attenuation due to H in Ta was measured between 0.5 K and 10 K for frequencies between 10 MHz and 55 MHz. The sound velocity change due to H in Nb was measured in both the normal and superconducting state at …
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An ultrasonic study of hydroxyl ion in single crystals of rubidium chloride
Ultrasonic measurements o~ absorption and velocity changes of sound waves on single crystals of RbCl containing OH ions were made as a function of polarization, frequency, concentration and temperature from 0.6 K to 24 K. A rise in absorption of the low frequency (10 to 70 MHz) Cmode sound waves …
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An Ultrasonic Study of Impurity-Interstitial Complexes in Electron Irradiated Aluminum-Silicon and Aluminum-Silver
Ultrasonic attenuation and velocity measurements were performed to probe the structure and annealing behavior of solute self interstitial complexes in electron irradiated (T -monoclinic defect symmetry is present. The annealing, during Stage II, of this defect species follows a first order rate …
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An ultrasonic study of impurity-interstitial complexes in electron irradiated Al-Si and Al-Ag
Ultrasonic attenuation and velocity measurements were performed to probe the structure and annealing behavior of solute self interstitial complexes in electron irradiated (T < 70 K) dilute Al-Ag and Al-Si alloys. In both alloy systems, a similar attenuation peak structure is observed. This peak …