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Instruments / Technical Area	Publication Details	Published
	Atomic structure of the Mg66Zn30Ca4 metallic glass Karel Saksl , Ildikó Pethes , Pál Jóvári , Zuzana Molčanová , Juraj Durisin , Beáta Ballóková , László Temleitner , Stefan Michalik , Michaela Sulikova , Katarína Šuľová , Miloš Fejercak , Dagmara Varcholová , Rastislav Motýľ Journal Of Non-Crystalline Solids 558 DOI: 10.1016/j.jnoncrysol.2021.120660 Show Abstract ▼ Abstract: Amorphous alloys consisting of elements present in the human body, such as magnesium, zinc and calcium, are currently extensively studied in order to utilize them as a material for biodegradable orthopaedic implants. amongst all Mg-Zn-Ca alloys investigated up to date, the Mg66Zn30Ca4 composition has the greatest potential for applications. Its critical casting thickness reaches a value of 5 mm, the compressive strength (716–854 MPa) is about 4 times the limit of human cortical bone while elastic modulus is (31 GPa) is only 3 times higher than that of human bone. During dissolution the alloy shows only marginal hydrogen evolution. Here we present a detailed, experiment-based structural investigation of Mg66Zn30Ca4. Structural and topological analysis of its atomic structure reveals a high number of predominantly icosahedral densely packed Zn-centred clusters. It is believed that the existence of these structural units is responsible for the suppression of internal diffusion and thus greatly improves glass formability.	Apr 2021
	Development of new Mg-Zn-Sr alloys for medical purpose Michaela Sulikova , Zuzana Molčanová , Beata Ballóková , Juraj Durisin , Slávka Martinková , Dagmara Varcholová , Stefan Michalik , Robert Tang Kong , Logan Ward , Apurva Mehta , Katarína Sulova , Miloš Fejercak , Andrea Lachova , Róbert Džunda , Karel Saksl International Journal Of Nanotechnology 17 DOI: 10.1504/IJNT.2020.111327 Show Abstract ▼ Abstract: In surgery, in addition to joint replacement, which requires permanent implantation of the prosthesis into the human body, there are many other clinical cases where fixation or mechanical support are only temporarily needed during the healing process of the injured or pathological tissue. In this case, biodegradable materials are the optimal choice as these materials do their job and degrade in the human body thereafter. Amorphous magnesium-zinc based alloys are nowadays a very promising group of metallic glasses (MGs). Unfortunately, the brittleness of Mg-Zn MGs and poor glass forming ability (GFA) have hindered their further application. We have developed a composition series of completely new (not published) ternary Mg-Zn-Sr alloys with attractive properties in terms of possible future applications (density comparable to human bones, wide supercooled liquid region, low rate of degradability, etc.). These ternary alloys will serve as precursors for design of future highly alloyed systems with tuned mechanical properties and dissociation rate in human body.	Nov 2020
I15-1-X-ray Pair Distribution Function (XPDF)	Development of new biodegradable alloys for medical applications Zuzana Molčanová , Beáta Balloková , Juraj Durisin , Katarina Sulova , Michaela Sulikova , Andrea Lachova , Maksym Lisnichuk , Milos Fejercak , Slávka Martinková , Stefan Michalik , Karel Saksl 28th International Conference on Metallurgy and Materials DOI: 10.37904/metal.2019.745 Diamond Proposal Number(s): [20770] Open Access Show Abstract ▼ Abstract: In surgery, besides the joint replacements that need permanent prosthesis implantation in the human body, there are many other clinical cases, such as bone fracture, cardiovascular diseases, in which the temporary implant materials are needed. The fixation or mechanical support are there temporarily needed during the healing process of the injured or pathological tissue, and after that, the implants accomplish their mission have no longer function in human body. In this case, biodegradable materials are the optimal choice as these materials do their job while healing and a new tissue forming occur and degrade in the human body thereafter. Amorphous alloys based on magnesium and calcium are nowadays a very perspective group of metallic glasses. We have developed composition series of completely new (not published) ternary Ca-Mg-Au biodegradable alloys with attractive properties in terms of possible future applications (density and elastic modulus comparable to human bones, wide supercooled liquid region etc.). Although the rate of their degradation in physiological solutions is still too fast, these ternary alloys will serve as precursors for design of future highly alloyed systems with tuned dissociation rate in human body.	Nov 2019

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