Antimicrobial and wear performance of Cu-Zr-Al metallic glass composites
Villapún, Victor M. (Northumbria University (Regne Unit). Faculty of Engineering and Environment)
Zhang, Huiyan (Universitat Autònoma de Barcelona. Departament de Física)
Howden, C. (Newcastle University. School of Biology)
Sort Viñas, Jordi (Universitat Autònoma de Barcelona. Departament de Física)

Date:	2017
Abstract:	The antimicrobial and wear behaviour of metallic glass composites corresponding to the Cu50+x(Zr44Al6)50-x system with x=(0, 3 and 6) has been studied. The three compositions consist of crystalline phases embedded in an amorphous matrix and they exhibit crystallinity increase with increasing copper content, i. e. , decrease of the glass-forming ability. The wear resistance also increases with the addition of copper as indirectly assessed from H/Er and H3/Er2 parameters obtained from nanoindentation tests. These results are in agreement with scratch tests since for the alloy with highest Cu content, i. e. , Cu56Zr38. 7Al5. 3, reveals a crack increase, lower pile-up, prone adhesion wear in dry sliding and higher scratch groove volume to pile-up volume. Samples with higher Cu content revealed higher hydrophilicity. Time-kill studies revealed higher reduction in colony-forming units for E. coli (gram-negative) and B. subtilis (gram-positive) after 60 min of contact time for the Cu56Zr38. 7Al5. 3 alloy and all the samples achieved a complete elimination of bacteria in 250 min.
Grants:	Ministerio de Economía y Competitividad MAT2014-57960-C3-1-R Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-1015
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Tribological properties ; Antimicrobial behaviour ; Metallic glass composite ; Scratch test ; Nanoindentation
Published in:	Materials & design, Vol. 115 (Febrer 2017) , p. 93-102, ISSN 0261-3069

DOI: 10.1016/j.matdes.2016.11.029

Post-print 20 p, 1.4 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Group of Smart Nanoengineered Materials, Nanomechanics and Nanomagnetism (Gnm3)
Articles > Research articles
Articles > Published articles