Ritter, Yvonne ; Sopu, Daniel ; Gleiter, Herbert ; Albe, Karsten (2011)
Structure, stability and mechanical properties of internal interfaces in Cu64Zr36 nanoglasses studied by MD simulations.
In: Acta Materialia, 59 (17)
doi: 10.1016/j.actamat.2011.07.013
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Internal interfaces in a Cu64Zr36 glass were generated by joining two planar surfaces and studied with respect to their structure and stability by means of molecular dynamics simulations. In analogy to grain boundaries in crystalline materials, glass–glass interfaces are characterized by a defective short-range order and an excess free volume of about 1–2%. They are stable even close to Tg and exhibit similarities to shear bands that occur in deformed metallic glasses. When deformed in uniaxial tension, pre-existing interfaces promote shear band formation and yielding occurs at lower stress than in the homogeneous bulk glass sample. The results confirm the concept of internal interfaces in nanoglasses.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2011 |
| Autor(en): | Ritter, Yvonne ; Sopu, Daniel ; Gleiter, Herbert ; Albe, Karsten |
| Art des Eintrags: | Bibliographie |
| Titel: | Structure, stability and mechanical properties of internal interfaces in Cu64Zr36 nanoglasses studied by MD simulations |
| Sprache: | Englisch |
| Publikationsjahr: | Oktober 2011 |
| Verlag: | Elsevier Science Publishing Company |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Acta Materialia |
| Jahrgang/Volume einer Zeitschrift: | 59 |
| (Heft-)Nummer: | 17 |
| DOI: | 10.1016/j.actamat.2011.07.013 |
| URL / URN: | http://www.sciencedirect.com/science/article/pii/S1359645411... |
| Kurzbeschreibung (Abstract): | Internal interfaces in a Cu64Zr36 glass were generated by joining two planar surfaces and studied with respect to their structure and stability by means of molecular dynamics simulations. In analogy to grain boundaries in crystalline materials, glass–glass interfaces are characterized by a defective short-range order and an excess free volume of about 1–2%. They are stable even close to Tg and exhibit similarities to shear bands that occur in deformed metallic glasses. When deformed in uniaxial tension, pre-existing interfaces promote shear band formation and yielding occurs at lower stress than in the homogeneous bulk glass sample. The results confirm the concept of internal interfaces in nanoglasses. |
| Freie Schlagworte: | Metallic glasses, Interfaces, Shear bands, Molecular dynamics |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialmodellierung |
| Hinterlegungsdatum: | 22 Feb 2012 11:00 |
| Letzte Änderung: | 05 Mär 2013 09:58 |
| PPN: | |
| Sponsoren: | The authors acknowledge financial support by the Deutsche Forschungsgemeinschaft (DFG) through project Grants No. Al-578-6 and Al-578/13-1., Computing time was made available by HHLR Frankfurt and Darmstadt, as well as by CSC Julich. |
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