Dr. Sergio Gonzalez

Dr. Sergio  Gonzalez |Clyto Access

Northumbria University, UK

Speaker

Expertise: Rapid solidification, Metallic glasses and composites, Nano and Micromechanics, Antimicrobial materials, Biomaterials

Biography: Dr. Sergio Gonzalez Sanchez is Senior Lecturer at Northumbria University, UK. His research spans a wide range of areas from the development of antimicrobial and biomaterials to shape memory alloys, metallic glasses and composites, nanomaterials and processing-structure-property relationships in metals. He has published over 40 refereed journal articles and he is editor board member of numerous journals such as Advances in Alloys and Compounds and the American Journal of Science and Technology. Additionally he is board member of the Light Metals Division (LMD) of the Institute of Materials, Minerals and Mining (IOM3) in the UK and Life Member of the American Association for Science and Technology (AASCIT).,

Presentation:

Title: Novel metallic glass composites with optimum antimicrobial and wear performance

Abstract:

In the European Union 8 to 12 % of the inhabitants risk of nosocomial infections.Hospital touch surfaces such as bed rails and handles can be a reservoir of pathogens that cause infections resulting not only in substantial economic losses but even in patient death.Antimicrobial copper is the most effective touch surface material against pathogenic microbes since it can kill more than 99.9 % bacteria within 2 hours of exposure. However, copper is a relative soft material that exhibits low wear resistance compared to other materials. An easy technique to improve the durability of the material is to mix copper with other elements and cool fast enough to form metallic glass composites, although it might be at the expense of losing part of the antimicrobial ability. The aim of this work is to study the antimicrobial and wear performance of alloys corresponding to the CuZrAl system with increasing content of Cu (50, 53 and 56 at. %). The scratch resistance of the samples was observed to increase with increasing addition of Cu due to the formation of small intermetallic phasesembedded in an amorphous matrix. Antimicrobial tests with E. coli or B. subtilis cellsfor the x=50 specimen did not display any antimicrobial properties when compared with plastic controlafter 4 hours contact. For the x=53 sample, E. coli and B. subtilis numbers were reduced by ca. 50% and 70% respectively. The x=56 sample reduced cell numbers by >99% for both species when compared to the plastic control.
              

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Related Conferences :

World Summit on Nanotechnology and Nanomedicine Research