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Títol: High hardness, low youngs modulus and low friction of nanocrystalline ZrW 2 laves phase and Zr 1-xW x thin films
Autor: Horwat, David
Jiménez Piqué, Emilio
Pierson, J.F.
Migot, S.
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
Materials nanoestructurals
Pel·lícules fines
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 youngs modulus and low friction of nanocrystalline ZrW 2 laves phase and Zr 1-xW x thin films. "Journal of physics and chemistry of solids", 2012, vol. 73, núm. 4, p. 554-558.
Disponible al dipòsit:E-prints UPC

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