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- D. B. Fraser
- Bell Telephone Laboratories, Inc., Murray Hill, New Jersey
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- R. C. LeCraw
- Bell Telephone Laboratories, Inc., Murray Hill, New Jersey
抄録
<jats:p>A technique has been devised whereby the elastic and anelastic properties of solids can be measured both as a function of frequency and temperature. A small sphere, of the order of a few millimeters in diameter, is placed without bonding on a shear mode transducer. The transducer is driven with a pulse at one of the sphere's resonant frequencies and the free decay of the sphere's vibrations is observed by switching the transducer to a receiver. From the decay of the vibrations, the internal friction Q−1 may be calculated. Various modes may be excited and from comparison with the computed mode spectra of an isotropic solid, the Lamé constants, λ and μ, and Poisson's ratio may be calculated directly. Measurements have been made over a range of temperatures from 1.4 to near 400°K, the present upper limit being set by the solder connections to the transducer. Several materials have been tested and the results for two single-crystal nonmagnetic garnet spheres are given as representative of the capabilities of the technique for reasonably isotropic substances. The values of Q−1 for these garnets lie between 3×10−7 and 2×10−5 at a frequency of approximately 2 Mc.</jats:p>
収録刊行物
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- Review of Scientific Instruments
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Review of Scientific Instruments 35 (9), 1113-1115, 1964-09-01
AIP Publishing
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詳細情報 詳細情報について
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- CRID
- 1360855569099873792
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- NII論文ID
- 30015973810
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- ISSN
- 10897623
- 00346748
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- データソース種別
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