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The effects of grain grooves on grain boundary migration in nanofilms / Amy Novick-Cohen in Acta materialia, Vol. 58 N° 3 (Fevrier 2010) 

Public ISBD [article]  in Acta materialia > Vol. 58 N° 3 (Fevrier 2010) . - pp. 813-822 Titre : The effects of grain grooves on grain boundary migration in nanofilms Type de document : texte imprimé Auteurs : Amy Novick-Cohen, Auteur ; Olga Zelekman-Smirin, Auteur ; Arkady Vilenkin, Auteur Article en page(s) : pp. 813-822 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Grain  boundaries  Grain  growth  Surface  diffusion  Theory Index. décimale : 669 Métallurgie Résumé : Using numerical computations and asymptotic analysis, we study the effects of grain grooves on grain boundary migration in nanofilms, focusing for simplicity on axisymmetric bicrystals containing an embedded cylindrical grain located at the origin. We find there is a critical initial grain radius, R*, such that if RR*, groove growth during grain shrinkage leads to film break-up. The central cross-section of the grain boundary profile is seen to be parabolic, and an ordinary differential equation which depends on the tilt angle and the groove depth is seen to govern the location of the groove root. Near the annihilation–pinch-off transition, temporary stagnation occurs; thereafter, the shrinking grain accelerates rapidly, then disappears. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%235556%23 [...] [article] The effects of grain grooves on grain boundary migration in nanofilms [texte imprimé] / Amy Novick-Cohen, Auteur ; Olga Zelekman-Smirin, Auteur ; Arkady Vilenkin, Auteur . - pp. 813-822. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 3 (Fevrier 2010) . - pp. 813-822 Mots-clés : Grain  boundaries  Grain  growth  Surface  diffusion  Theory Index. décimale : 669 Métallurgie Résumé : Using numerical computations and asymptotic analysis, we study the effects of grain grooves on grain boundary migration in nanofilms, focusing for simplicity on axisymmetric bicrystals containing an embedded cylindrical grain located at the origin. We find there is a critical initial grain radius, R*, such that if RR*, groove growth during grain shrinkage leads to film break-up. The central cross-section of the grain boundary profile is seen to be parabolic, and an ordinary differential equation which depends on the tilt angle and the groove depth is seen to govern the location of the groove root. Near the annihilation–pinch-off transition, temporary stagnation occurs; thereafter, the shrinking grain accelerates rapidly, then disappears. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%235556%23 [...]

The effects of grain grooves on grain boundary migration in nanofilms / Amy Novick-Cohen in Acta materialia, Vol. 58 N° 3 (Fevrier 2010) 

Public ISBD [article]  in Acta materialia > Vol. 58 N° 3 (Fevrier 2010) . - pp. 813–822 Titre : The effects of grain grooves on grain boundary migration in nanofilms Type de document : texte imprimé Auteurs : Amy Novick-Cohen, Auteur ; Olga Zelekman-Smirin, Auteur ; Arkady Vilenkin, Auteur Année de publication : 2011 Article en page(s) : pp. 813–822 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Grain  boundaries  Grain  growth  Surface  diffusion  Theory Résumé : Using numerical computations and asymptotic analysis, we study the effects of grain grooves on grain boundary migration in nanofilms, focusing for simplicity on axisymmetric bicrystals containing an embedded cylindrical grain located at the origin. We find there is a critical initial grain radius, R∗, such that if RR∗, groove growth during grain shrinkage leads to film break-up. The central cross-section of the grain boundary profile is seen to be parabolic, and an ordinary differential equation which depends on the tilt angle and the groove depth is seen to govern the location of the groove root. Near the annihilation–pinch-off transition, temporary stagnation occurs; thereafter, the shrinking grain accelerates rapidly, then disappears. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S135964540900665X [article] The effects of grain grooves on grain boundary migration in nanofilms [texte imprimé] / Amy Novick-Cohen, Auteur ; Olga Zelekman-Smirin, Auteur ; Arkady Vilenkin, Auteur . - 2011 . - pp. 813–822. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 3 (Fevrier 2010) . - pp. 813–822 Mots-clés : Grain  boundaries  Grain  growth  Surface  diffusion  Theory Résumé : Using numerical computations and asymptotic analysis, we study the effects of grain grooves on grain boundary migration in nanofilms, focusing for simplicity on axisymmetric bicrystals containing an embedded cylindrical grain located at the origin. We find there is a critical initial grain radius, R∗, such that if RR∗, groove growth during grain shrinkage leads to film break-up. The central cross-section of the grain boundary profile is seen to be parabolic, and an ordinary differential equation which depends on the tilt angle and the groove depth is seen to govern the location of the groove root. Near the annihilation–pinch-off transition, temporary stagnation occurs; thereafter, the shrinking grain accelerates rapidly, then disappears. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S135964540900665X