Silver influence of multi-functional Zr-Cu based TFMGs on their antibacterial activity.
G. NKOU BOUALA, A. ETIEMBLE1, C. DER LOUGHIAN1, C. LANGLOIS1, S. CARDINAL1, J.M. PELLETIER1, J.F. PIERSON2, P. STEYER1
 MATEIS Laboratory-INSA de Lyon, 2 Avenue Jean Capelle, 69621, Villeurbanne cedex, France
 Institut Jean Lamour, Université de Lorraine, 54011 Nancy, France
Keywords: Magnetron sputtering, Thin Film Metallic Glasses, Antibacterial activity, microstructure, Physico-chemical properties
film metallic glasses (TFMG) have recently emerged as alternative
materials for many applications (micro-electro-mechanical systems and
biomedical use), owing to their unique characteristics such as large
elastic limit, high toughness and high corrosion resistance.
characteristics are related to their microstructure that lacks
long-range-order atomic periodicity and amorphous texture. However, if
the mechanical properties of the TFMGs have been largely studied, just
few studies have been focused on the understanding of their
microstructure evolution during heating.
order to investigate the thermal stability of antibacterial
magnetron-sputtered Zr-Cu and Zr-Cu-Ag TFMGs, the present study
proposes a multiscale characterization involving in situ techniques.
First, the crystallization behavior and structural stability were
investigated by in situ high temperature XRD combined to DSC
experiments, during a continuous heating from room temperature to 600°C
under vacuum. Moreover, due to the fast diffusion of silver,
silver-based coatings are subject to dewetting. Such process, leading
to the formation of micrometric segregated micrometer-sized domains,
was observed in situ by using HT-environmental SEM. Finally, at a
deeper nanometric scale, in situ HT-TEM was used to observe, during
heating, the progressive formation of crystallized grains from the
initial amorphous matrix.
such a multiscale in situ approach, we should better understand the
general evolution of the TFMGs under thermal constraint."