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 &l...
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| Veröffentlicht in: | Functional Materials |
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| Datum: | 2015 |
| Hauptverfasser: | , |
| Format: | Artikel |
| Sprache: | Englisch |
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НТК «Інститут монокристалів» НАН України
2015
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| Online Zugang: | https://nasplib.isofts.kiev.ua/handle/123456789/119370 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Zitieren: | 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. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862656337633083392 |
|---|---|
| author | Petchenko, G.A. Petchenko, A.M. |
| author_facet | Petchenko, G.A. Petchenko, A.M. |
| 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. |
| collection | DSpace DC |
| container_title | 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.
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| first_indexed | 2025-12-02T04:17:02Z |
| format | Article |
| fulltext | |
| id | nasplib_isofts_kiev_ua-123456789-119370 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 1027-5495 |
| language | English |
| last_indexed | 2025-12-02T04:17:02Z |
| publishDate | 2015 |
| publisher | НТК «Інститут монокристалів» НАН України |
| record_format | dspace |
| spelling | Petchenko, G.A. Petchenko, A.M. 2017-06-06T17:04:09Z 2017-06-06T17:04:09Z 2015 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 https://nasplib.isofts.kiev.ua/handle/123456789/119370 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. en НТК «Інститут монокристалів» НАН України Functional Materials Characterization and properties Influence of elastic stresses and temperature on the dislocation unpinning from the stoppers in KCl crystals Article published earlier |
| spellingShingle | 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 |
| title | 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_short | 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 |
| topic | Characterization and properties |
| topic_facet | Characterization and properties |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/119370 |
| work_keys_str_mv | AT petchenkoga influenceofelasticstressesandtemperatureonthedislocationunpinningfromthestoppersinkclcrystals AT petchenkoam influenceofelasticstressesandtemperatureonthedislocationunpinningfromthestoppersinkclcrystals |