Influence of elastic stresses and temperature on the dislocation unpinning from the stoppers in KCl crystals
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 strain range. It has been found that the temperature increase at stresses σ < σ...
Збережено в:
| Дата: | 2015 |
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| Автори: | , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
НТК «Інститут монокристалів» НАН України
2015
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| Назва видання: | Functional Materials |
| Теми: | |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/119370 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Influence of elastic stresses and temperature on the dislocation unpinning from the stoppers in KCl crystals / G.A. Petchenko, A.M. Petchenko // Functional Materials. — 2015. — Т. 22, № 3. — С. 293-298. — Бібліогр.: 14 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
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irk-123456789-1193702017-06-07T03:04:20Z Influence of elastic stresses and temperature on the dislocation unpinning from the stoppers in KCl crystals Petchenko, G.A. Petchenko, A.M. Characterization and properties 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 strain range. It has been found that the temperature increase at stresses σ < σt (σt is the yield strength of a crystal) leads to the intensive dislocation unpinning). Consequently, concentration of stoppers, controlling their motion, sharply decreases and the effective length of oscillating dislocation segments increases. As a result of the experimental data processing the energy of the impurity atom binding with dislocation U₀ and quantity L characterizing a mean size of the dislocation cell was calculated. The experimental results were discussed within the framework of known dislocation theories. 2015 Article Influence of elastic stresses and temperature on the dislocation unpinning from the stoppers in KCl crystals / G.A. Petchenko, A.M. Petchenko // Functional Materials. — 2015. — Т. 22, № 3. — С. 293-298. — Бібліогр.: 14 назв. — англ. 1027-5495 DOI: http://dx.doi.org/10.15407/fm22.03.293 http://dspace.nbuv.gov.ua/handle/123456789/119370 en Functional Materials НТК «Інститут монокристалів» НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| topic |
Characterization and properties Characterization and properties |
| spellingShingle |
Characterization and properties Characterization and properties Petchenko, G.A. Petchenko, A.M. Influence of elastic stresses and temperature on the dislocation unpinning from the stoppers in KCl crystals Functional Materials |
| description |
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 strain range. It has been found that the temperature increase at stresses σ < σt (σt is the yield strength of a crystal) leads to the intensive dislocation unpinning). Consequently, concentration of stoppers, controlling their motion, sharply decreases and the effective length of oscillating dislocation segments increases. As a result of the experimental data processing the energy of the impurity atom binding with dislocation U₀ and quantity L characterizing a mean size of the dislocation cell was calculated. The experimental results were discussed within the framework of known dislocation theories. |
| format |
Article |
| author |
Petchenko, G.A. Petchenko, A.M. |
| author_facet |
Petchenko, G.A. Petchenko, A.M. |
| author_sort |
Petchenko, G.A. |
| title |
Influence of elastic stresses and temperature on the dislocation unpinning from the stoppers in KCl crystals |
| title_short |
Influence of elastic stresses and temperature on the dislocation unpinning from the stoppers in KCl crystals |
| title_full |
Influence of elastic stresses and temperature on the dislocation unpinning from the stoppers in KCl crystals |
| title_fullStr |
Influence of elastic stresses and temperature on the dislocation unpinning from the stoppers in KCl crystals |
| title_full_unstemmed |
Influence of elastic stresses and temperature on the dislocation unpinning from the stoppers in KCl crystals |
| title_sort |
influence of elastic stresses and temperature on the dislocation unpinning from the stoppers in kcl crystals |
| publisher |
НТК «Інститут монокристалів» НАН України |
| publishDate |
2015 |
| topic_facet |
Characterization and properties |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/119370 |
| citation_txt |
Influence of elastic stresses and temperature on the dislocation unpinning from the stoppers in KCl crystals / G.A. Petchenko, A.M. Petchenko // Functional Materials. — 2015. — Т. 22, № 3. — С. 293-298. — Бібліогр.: 14 назв. — англ. |
| series |
Functional Materials |
| work_keys_str_mv |
AT petchenkoga influenceofelasticstressesandtemperatureonthedislocationunpinningfromthestoppersinkclcrystals AT petchenkoam influenceofelasticstressesandtemperatureonthedislocationunpinningfromthestoppersinkclcrystals |
| first_indexed |
2023-10-18T20:34:24Z |
| last_indexed |
2023-10-18T20:34:24Z |
| _version_ |
1796150553074466816 |