Influence of the porosity on the dispersion of the phase velocity of longitudinal acoustic waves in isotropic metal-matrix composites
Acoustical Physics, ISSN: 1063-7710, Vol: 63, Issue: 3, Page: 288-296
2017
- 12Citations
- 1Captures
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Article Description
The influence of the volumetric porosity of isotropic metal-matrix composite materials, which are reinforced with ceramic microparticles, on the dispersion of the phase velocity of longitudinal acoustic waves is investigated. For this purpose, the method of broadband acoustic spectroscopy with a laser source of ultrasound and piezoelectric detection of nanosecond ultrasonic pulses is used. Composite samples based on a silumin matrix with added silicon carbide (SiC) microparticles in different mass concentrations (3.8–15.5%) were investigated. As the concentration of SiC particles in a sample increases, its porosity that is determined using the hydrostatic-weighing method also increases. The simultaneous increase in the filler concentration and porosity leads to the appearance of a dispersion of the phase velocity of longitudinal acoustic waves in the sample within the frequency range of 3–25 MHz. The obtained empirical relationship between the relative change in the phase velocity and the sample porosity can be used to obtain a proximate quantitative estimate of the bulk porosity of the isotropic metal-matrix composite materials.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85021402403&origin=inward; http://dx.doi.org/10.1134/s106377101703006x; http://link.springer.com/10.1134/S106377101703006X; http://link.springer.com/content/pdf/10.1134/S106377101703006X.pdf; http://link.springer.com/article/10.1134/S106377101703006X/fulltext.html; https://dx.doi.org/10.1134/s106377101703006x; https://link.springer.com/article/10.1134%2FS106377101703006X
Pleiades Publishing Ltd
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