Crystallization of Ti<sub>33</sub>Cu<sub>67 </sub>metallic glass under high-current density electrical pulses
<p>Abstract</p> <p>We have studied the phase and structure evolution of the Ti<sub>33</sub>Cu<sub>67 </sub>amorphous alloy subjected to electrical pulses of high current density. By varying the pulse parameters, different stages of crystallization could be o...
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2011-01-01
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| Series: | Nanoscale Research Letters |
| Online Access: | http://www.nanoscalereslett.com/content/6/1/512 |
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doaj-b0e819061f8e49cc875fb881bd5653042020-11-25T00:57:16ZengSpringerOpenNanoscale Research Letters1931-75731556-276X2011-01-0161512Crystallization of Ti<sub>33</sub>Cu<sub>67 </sub>metallic glass under high-current density electrical pulsesMali VyacheslavAnisimov AlexanderGeorgarakis KonstantinosYavari AlainNeklyudova MariaDudina DinaLomovsky OlegKorchagin MichailBulina Natalia<p>Abstract</p> <p>We have studied the phase and structure evolution of the Ti<sub>33</sub>Cu<sub>67 </sub>amorphous alloy subjected to electrical pulses of high current density. By varying the pulse parameters, different stages of crystallization could be observed in the samples. Partial polymorphic nanocrystallization resulting in the formation of 5- to 8-nm crystallites of the TiCu<sub>2 </sub>intermetallic in the residual amorphous matrix occurred when the maximum current density reached 9.7·10<sup>8 </sup>A m<sup>-2 </sup>and the pulse duration was 140 μs, though the calculated temperature increase due to Joule heating was not enough to reach the crystallization temperature of the alloy. Samples subjected to higher current densities and higher values of the evolved Joule heat per unit mass fully crystallized and contained the Ti<sub>2</sub>Cu<sub>3 </sub>and TiCu<sub>3 </sub>phases. A common feature of the crystallized ribbons was their non-uniform microstructure with regions that experienced local melting and rapid solidification.</p> <p> <b>PACS: </b>81; 81.05.Bx; 81.05.Kf.</p> http://www.nanoscalereslett.com/content/6/1/512 |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Mali Vyacheslav Anisimov Alexander Georgarakis Konstantinos Yavari Alain Neklyudova Maria Dudina Dina Lomovsky Oleg Korchagin Michail Bulina Natalia |
| spellingShingle |
Mali Vyacheslav Anisimov Alexander Georgarakis Konstantinos Yavari Alain Neklyudova Maria Dudina Dina Lomovsky Oleg Korchagin Michail Bulina Natalia Crystallization of Ti<sub>33</sub>Cu<sub>67 </sub>metallic glass under high-current density electrical pulses Nanoscale Research Letters |
| author_facet |
Mali Vyacheslav Anisimov Alexander Georgarakis Konstantinos Yavari Alain Neklyudova Maria Dudina Dina Lomovsky Oleg Korchagin Michail Bulina Natalia |
| author_sort |
Mali Vyacheslav |
| title |
Crystallization of Ti<sub>33</sub>Cu<sub>67 </sub>metallic glass under high-current density electrical pulses |
| title_short |
Crystallization of Ti<sub>33</sub>Cu<sub>67 </sub>metallic glass under high-current density electrical pulses |
| title_full |
Crystallization of Ti<sub>33</sub>Cu<sub>67 </sub>metallic glass under high-current density electrical pulses |
| title_fullStr |
Crystallization of Ti<sub>33</sub>Cu<sub>67 </sub>metallic glass under high-current density electrical pulses |
| title_full_unstemmed |
Crystallization of Ti<sub>33</sub>Cu<sub>67 </sub>metallic glass under high-current density electrical pulses |
| title_sort |
crystallization of ti<sub>33</sub>cu<sub>67 </sub>metallic glass under high-current density electrical pulses |
| publisher |
SpringerOpen |
| series |
Nanoscale Research Letters |
| issn |
1931-7573 1556-276X |
| publishDate |
2011-01-01 |
| description |
<p>Abstract</p> <p>We have studied the phase and structure evolution of the Ti<sub>33</sub>Cu<sub>67 </sub>amorphous alloy subjected to electrical pulses of high current density. By varying the pulse parameters, different stages of crystallization could be observed in the samples. Partial polymorphic nanocrystallization resulting in the formation of 5- to 8-nm crystallites of the TiCu<sub>2 </sub>intermetallic in the residual amorphous matrix occurred when the maximum current density reached 9.7·10<sup>8 </sup>A m<sup>-2 </sup>and the pulse duration was 140 μs, though the calculated temperature increase due to Joule heating was not enough to reach the crystallization temperature of the alloy. Samples subjected to higher current densities and higher values of the evolved Joule heat per unit mass fully crystallized and contained the Ti<sub>2</sub>Cu<sub>3 </sub>and TiCu<sub>3 </sub>phases. A common feature of the crystallized ribbons was their non-uniform microstructure with regions that experienced local melting and rapid solidification.</p> <p> <b>PACS: </b>81; 81.05.Bx; 81.05.Kf.</p> |
| url |
http://www.nanoscalereslett.com/content/6/1/512 |
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