Перегляд за автором "Petchenko, G.A."

Результати 1-8 з 8

Dynamic damping of dislocations in the irradiated LiF crystals

Petchenko, G.A. (Functional Materials, 2012)

To study the nature of the mechanisms that limit the viscous motion of dislocations, the dampfed dislocation resonance in LiF crystals at room temperature in the range of radiation doses of 0-1000 R has been scrutinized ...
Dynamic damping of dislocations with phonons in Kbr single crystals

Petchenko, A.M.; Petchenko, G.A. (Functional Materials, 2006)

The damped dislocation resonance in KBr crystals has been studied using the pulse echo method in the frequency range 7.5 to 217.5 MHz and temperature range 77-300 K. In samples with per-deformation 0.23 and 0.5% the ...
Effect of crystal pre-straining on phonon damping of dislocations

Petchenko, A.M.; Petchenko, G.A. (Functional Materials, 2008)

The damped dislocation resonance in KBr crystals at 0.75 % residual strain has been studied in the 77 to 300 K temperature range using the pulsed echo technique. The sample strain change has been found to influence ...
Features of resonance absorption of longitudinal ultrasound in strained crystals KBr at temperature variations

Petchenko, A.M.; Petchenko, G.A. (Functional Materials, 2007)

The frequency dependence of a dislocation damping decrement of ultrasound in KBr single crystals preliminary strained up to 1 % in the temperature range 77-300 K and frequency range 7.5-217.5 MHz has been investigated. The ...
Influence of elastic stresses and temperature on the dislocation unpinning from the stoppers in KCl crystals

Petchenko, G.A.; Petchenko, A.M. (Functional Materials, 2015)

Impulse echo-method was applied to investigate, in the temperature range from 300 to 430 K at 7.5 MGz frequency, the dislocation absorption αd(σ) in KCl crystals as a function of statistic loading in the quasi-elastic ...
Research of the preliminary deformation and irradiation effect on the viscous damping of dislocations in LiF crystals

Petchenko, G.A. (Functional Materials, 2013)

Pulse-echo method in the frequency range of 37.5—232.5 MHz in LiF crystals at T=300 K has been used to study the behaviour of dislocation decrement Δd(f) at variations of the residual strain value and X-ray radiation ...
The dislocation resonance absorption of ultrasoundin KBr crystals at low temperatures

Petchenko, G.A.; Petchenko, A.M. (Functional Materials, 2009)

The frequency spectra of ultrasound dislocation losses in KBr single crystals with different dislocations density Λ have been researched at fixed temperatures in the T = 300-77 K interval. It is found that at any T = const ...
The study of the dislocation resonance in LiF crystals under the influence of the low-dose X-irradiation

Petchenko, G.A.; Petchenko, A.M. (Functional Materials, 2010)

Результати 1-8 з 8

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Перегляд за автором "Petchenko, G.A."

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Перегляд за автором "Petchenko, G.A."

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