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Nanocrystalline–amorphous transitions in Al–Mo thin films: Bulk and surface evolution

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Title: Nanocrystalline–amorphous transitions in Al–Mo thin films: Bulk and surface evolution
Authors: Ophus, C.1,2, Luber, E.J.1,2, Edelen, M.3, Lee, Z.4, Fischer, L.M.2,5, Evoy, S.2,5, Lewis, D.3, Dahmen, U.4, Radmilovic, V.4 VRRadmilovic@lbl.gov, Mitlin, D.1,2 dmitlin@ualberta.ca
Source: Acta Materialia. Aug2009, Vol. 57 Issue 14, p4296-4303. 8p.
Subjects: Nanocrystals, Amorphous substances, Aluminum alloys, Binary metallic systems, Metallic films, Surface roughness, Body-centered cubic metals, X-ray diffraction
Abstract: Abstract: We investigate the bulk and surface features of the crystalline–amorphous transitions in binary Al–Mo alloy thin films as a function of Mo composition using transmission electron microscopy, X-ray diffraction and atomic force microscopy analysis, as well as thermodynamic modeling. Of the alloys tested, the minimum in the root mean square (rms) surface roughness and correlation length occurs at the Al–32at.% Mo composition, which corresponds to the maximum volume fraction of the amorphous phase and the minimum volume fraction of the body centered cubic nanocrystallites. The rms surface roughness of the 32at.% Mo films is on the order of a single nanometer, compared with nearly 80nm for the 50at.% Mo film. A structure–zone map is constructed to relate the surface morphology of the films to their bulk microstructure. A thermodynamic model developed by Miedema and coworkers was used to predict the general trends observed in the microstructural evolution as a function of film composition. [Copyright &y& Elsevier]
Copyright of Acta Materialia is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 43340693
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  Data: Nanocrystalline–amorphous transitions in Al–Mo thin films: Bulk and surface evolution
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  Data: <searchLink fieldCode="AR" term="%22Ophus%2C+C%2E%22">Ophus, C.</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Luber%2C+E%2EJ%2E%22">Luber, E.J.</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Edelen%2C+M%2E%22">Edelen, M.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Lee%2C+Z%2E%22">Lee, Z.</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Fischer%2C+L%2EM%2E%22">Fischer, L.M.</searchLink><relatesTo>2,5</relatesTo><br /><searchLink fieldCode="AR" term="%22Evoy%2C+S%2E%22">Evoy, S.</searchLink><relatesTo>2,5</relatesTo><br /><searchLink fieldCode="AR" term="%22Lewis%2C+D%2E%22">Lewis, D.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Dahmen%2C+U%2E%22">Dahmen, U.</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Radmilovic%2C+V%2E%22">Radmilovic, V.</searchLink><relatesTo>4</relatesTo><i> VRRadmilovic@lbl.gov</i><br /><searchLink fieldCode="AR" term="%22Mitlin%2C+D%2E%22">Mitlin, D.</searchLink><relatesTo>1,2</relatesTo><i> dmitlin@ualberta.ca</i>
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  Data: <searchLink fieldCode="JN" term="%22Acta+Materialia%22">Acta Materialia</searchLink>. Aug2009, Vol. 57 Issue 14, p4296-4303. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Nanocrystals%22">Nanocrystals</searchLink><br /><searchLink fieldCode="DE" term="%22Amorphous+substances%22">Amorphous substances</searchLink><br /><searchLink fieldCode="DE" term="%22Aluminum+alloys%22">Aluminum alloys</searchLink><br /><searchLink fieldCode="DE" term="%22Binary+metallic+systems%22">Binary metallic systems</searchLink><br /><searchLink fieldCode="DE" term="%22Metallic+films%22">Metallic films</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+roughness%22">Surface roughness</searchLink><br /><searchLink fieldCode="DE" term="%22Body-centered+cubic+metals%22">Body-centered cubic metals</searchLink><br /><searchLink fieldCode="DE" term="%22X-ray+diffraction%22">X-ray diffraction</searchLink>
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  Data: Abstract: We investigate the bulk and surface features of the crystalline–amorphous transitions in binary Al–Mo alloy thin films as a function of Mo composition using transmission electron microscopy, X-ray diffraction and atomic force microscopy analysis, as well as thermodynamic modeling. Of the alloys tested, the minimum in the root mean square (rms) surface roughness and correlation length occurs at the Al–32at.% Mo composition, which corresponds to the maximum volume fraction of the amorphous phase and the minimum volume fraction of the body centered cubic nanocrystallites. The rms surface roughness of the 32at.% Mo films is on the order of a single nanometer, compared with nearly 80nm for the 50at.% Mo film. A structure–zone map is constructed to relate the surface morphology of the films to their bulk microstructure. A thermodynamic model developed by Miedema and coworkers was used to predict the general trends observed in the microstructural evolution as a function of film composition. [Copyright &y& Elsevier]
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  Data: <i>Copyright of Acta Materialia is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.actamat.2009.05.029
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