 | | Mechanics of Solids
A Journal of Russian Academy of Sciences | | Founded
in January 1966
Issued 6 times a year
Print ISSN 0025-6544
Online ISSN 1934-7936 |
Archive of Issues
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| In English (Mech. Solids): | | 4810 |
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| << Previous article | Volume 44, Issue 4 / 2009 | Next article >> |
| A. A. Gorshkov and V. A. Lomovskoi, "Young's Modulus Defect for the Solid Solution of Hydrogen in Palladium (PdHx)," Mech. Solids. 44 (4), 649-657 (2009) |
| Year |
2009 |
Volume |
44 |
Number |
4 |
Pages |
649-657 |
| DOI |
10.3103/S0025654409040153 |
| Title |
Young's Modulus Defect for the Solid Solution of Hydrogen in Palladium (PdHx) |
| Author(s) |
A. A. Gorshkov (Lomonosov Moscow State Academy of Fine Chemical Technology, pr-t Vernadskogo 86, Moscow, 119571 Russia)
V. A. Lomovskoi (Frunkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr-t 31, GSP-1, Moscow, 119991 Russia, lomovskoy@phyche.ac.ru) |
| Abstract |
We use the internal friction method in the free vibration mode to study the temperature dependence of the spectra of dissipative losses and shear modulus in the Pd polycrystalline system, the PdHx penetration solid solution, and in the dehydrogenized Pd system. Studying the spectra and shear moduli, we discovered that the hydrogen desorption from the α- and β-phases of the PdHx system occurs completely after the first cycle of heating of this system. The temperature dependences of the shear modulus of the original and dehydrogenized systems coincide. The existence of dissipative processes in the solid solution is related to the mobility of hydrogen atoms in the face-centered cubic lattice of the Pd structure and provokes the appearance of peaks of losses on the modulus defect spectrum in the temperature region. We consider the possibility of describing the modulus defect in the framework of phenomenological models of elasticity.
Dissolution of hydrogen atoms in a metal structure results in changes in the physical-mechanical characteristics of the obtained solid solutions compared with the original dehydrogenized metals. |
| Keywords |
polycrystalline system, elasticity modulus, spectrum, internal friction, experiment |
| References |
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|
| Received |
20 March 2007 |
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