Anomalous elastic behaviour of Bi-Pb-Ag composites

R. Ravinder Reddy, Muralidhar Miryala, V. Hari Babu, P. Venugopal Reddy

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Bi-Pb and Bi-Pb-Ag superconducting composites have been prepared by the solid state reaction method. After the usual characterization, ultrasonic longitudinal velocity and attenuation studies have been undertaken over a temperature range 80-300 K by the pulse transmission technique. In contrast to normal solids, the ultrasonic velocities of both the samples in the temperature range 200-100 K are found to decrease with decreasing temperature (softening), followed by a velocity maximum. The samples are also found to exhibit longitudinal attenuation peaks at temperatures = 260, 160 and 120 K. An attempt has also been made to verify whether the Wachtman's equations can theoretically explain the low-temperature behaviour of the Young's modulus of these materials. A qualitative explanation for both the phenomena of softening of velocity as well as the occurrence of attenuation peaks is given.

Original languageEnglish
Pages (from-to)367-372
Number of pages6
JournalPhysica C: Superconductivity and its Applications
Volume220
Issue number3-4
DOIs
Publication statusPublished - 1994 Feb 10
Externally publishedYes

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composite materials
attenuation
Composite materials
softening
ultrasonics
Temperature
temperature
Ultrasonic velocity
modulus of elasticity
Solid state reactions
occurrences
solid state
Elastic moduli
Ultrasonics
pulses

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Anomalous elastic behaviour of Bi-Pb-Ag composites. / Reddy, R. Ravinder; Miryala, Muralidhar; Babu, V. Hari; Reddy, P. Venugopal.

In: Physica C: Superconductivity and its Applications, Vol. 220, No. 3-4, 10.02.1994, p. 367-372.

Research output: Contribution to journalArticle

Reddy, R. Ravinder ; Miryala, Muralidhar ; Babu, V. Hari ; Reddy, P. Venugopal. / Anomalous elastic behaviour of Bi-Pb-Ag composites. In: Physica C: Superconductivity and its Applications. 1994 ; Vol. 220, No. 3-4. pp. 367-372.
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