Antimicrobial and wear performance of Cu-Zr-Al metallic glass composites

Villapún Puzas, Victor Manuel, Zhang, H., Howden, C., Chow, L. Cheung, Esat, Faye, Pérez, Pablo, Sort, Jordi, Bull, Steve, Stach, James and Gonzalez Sanchez, Sergio (2017) Antimicrobial and wear performance of Cu-Zr-Al metallic glass composites. Materials & Design, 115. pp. 93-102. ISSN 0264-1275

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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 Cu content, i.e., decrease of the glass-forming ability. The wear resistance also increases with the addition of Cu 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.

Item Type:	Article
Uncontrolled Keywords:	Tribological properties; Antimicrobial behaviour; Metallic glass composite; Scratch test; Nanoindentation
Subjects:	C500 Microbiology J100 Minerals Technology J300 Ceramics and Glasses J500 Materials Technology not otherwise specified
Department:	Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User:	Ellen Cole
Date Deposited:	06 Dec 2016 12:09
Last Modified:	10 Oct 2019 18:46
URI:	http://nrl.northumbria.ac.uk/id/eprint/28775

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