Mechanical and Tribological Properties of AlCuFe Quasicrystal and Al(Si)CuFe Approximant Thin Films
2016 (English)In: Journal of Materials Research, ISSN 0884-2914, E-ISSN 2044-5326, Vol. 31, no 2, 232-240 p.Article in journal (Refereed) Published
Multilayered thin films of Al/Cu/Fe have been prepared by magnetron sputtering and annealed into the quasicrystalline or approximant phases, for Al2O3 or Si substrates, respectively. The nanomechanical and nanotribological properties; hardness, elastic modulus, friction and toughness, have been measured using a triboindenter and analytical methods. The approximant phase, annealed at 600 °C for 4 h, proved to be harder and had higher elastic modulus values than the quasicrystalline phase, about, 15.6 GPa and 258 GPa, respectively. The fracture toughness of the approximant, <0.1 MPa/m½, was however inferior to that of the quasicrystals with 1.5 MPa/m½. The friction coefficients were measured in a range of 0.10-0.14 for the quasicrystalline and approximant thin films.
Place, publisher, year, edition, pages
Cambridge University Press, 2016. Vol. 31, no 2, 232-240 p.
quasicrystal, approximant, thin film, hardness, elastic modulus, friction, toughness, tribology, TEM, STEM, XRD
IdentifiersURN: urn:nbn:se:liu:diva-96907DOI: 10.1557/jmr.2015.384ISI: 000371704900007OAI: oai:DiVA.org:liu-96907DiVA: diva2:643923
Funding agencies: Knut and Alice Wallenberg Foundation; Swedish Government Strategic Research Area Grant in Materials Science (SFO Mat-LiU) on Advanced Functional Materials2013-08-292013-08-292016-08-31Bibliographically approved