Exploring the mechanical size effects in Zr sub(65)Ni sub(35) thin film metallic glasses

Mechanical size effects in Zr sub(65)Ni sub(35) Thin Film Metallic Glass (TFMG) are studied with an emphasis on a transition in failure mechanisms occurring below 500 nm. XRD and TEM analyses of Zr sub(65)Ni sub(35) TFMG confirm the absence of a crystalline phase. The thickness effect on the mechani...

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Bibliographic Details
Published in:Journal of alloys and compounds 2014-12, Vol.615, p.590-592
Main Authors: Ghidelli, Matteo, Volland, Antoine, Blandin, Jean-Jacques, Pardoen, Thomas, Raskin, Jean-Pierre, Mompiou, Frederic, Djemia, Philippe, Gravier, Sebastien
Format: Article
Language:English
Subjects:
Alloys
Amorphous materials
Brillouin zone
Film thickness
Metallic glasses
Nanoindentation
Spectroscopy
Thin films
Transmission electron microscopy
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Summary:Mechanical size effects in Zr sub(65)Ni sub(35) Thin Film Metallic Glass (TFMG) are studied with an emphasis on a transition in failure mechanisms occurring below 500 nm. XRD and TEM analyses of Zr sub(65)Ni sub(35) TFMG confirm the absence of a crystalline phase. The thickness effect on the mechanical properties of Zr sub(65)Ni sub(35) TFMGs is investigated using nanoindentation, Brillouin spectroscopy, and fracture tests. Brillouin spectroscopy shows no variation of the elastic constants, while the hardness - measured by nanoindentation - presents a continuous increase with decreasing film thickness. The fracture surface of the TFMGs involves corrugations which disappear when the thickness is reduced below 500 nm.
ISSN:0925-8388
DOI:10.1016/j.jallcom.2013.11.154