| Títol: | High hardness, low Young's modulus and low friction of nanocrystalline ZrW2 Laves phase and Zr1-xWx thin films |
| Autor: | Horwat, David
Jiménez Piqué, Emilio
Pierson, J.F.
Migot, A.
Dehmas, M.
Anglada Gomila, Marcos Juan |
| Altres autors/autores: | Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica |
| Matèries: | Àrees temàtiques de la UPC::Enginyeria dels materials
Nanostructures
A. Intermetallic compounds
A. Nanostructures
A. Thin films
D. Mechanical properties
Nanoestructures
Materials ceràmics |
| Tipus de document: | Article |
| Descripció: | Zr1−xWx nanocrystalline films of Zr-W solid solutions and ZrW2 Laves phase were synthesized by magnetron co-sputtering. Large values of the H/E ratio up to 0.09 are observed for grain sizes in the nanometer range along with a hardness above 10 GPa and Young's modulus below 230 GPa. H/E values are correlated with the developed surface of grain boundaries suggesting an elastic deformation mostly handled by the grain boundaries. This is associated to friction coefficients comparable to those of metallic glass surfaces. In contrast to fragile bulk Laves phases, no cracks were detected at the film surface after indentation and scratch test of nanocrystalline ZrW2. The friction coefficient of such films against diamond tip was in the range 0.08–0.15, similarly to metallic glass surfaces. |
| Altres identificadors i accés: | Horwat, D. [et al.]. High hardness, low Young's modulus and low friction of nanocrystalline ZrW2 Laves phase and Zr1-xWx thin films. "Journal of physics and chemistry of solids", Abril 2012, vol. 73, núm. 4, p. 554-558.
0022-3697
http://hdl.handle.net/2117/15849
10.1016/j.jpcs.2011.12.009 |
| Disponible al dipòsit: | E-prints UPC
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