TY - CHAP

T1 - Magnesium alloy containing silver for degradable biomedical implants

AU - Lukáč, František

AU - Vlček, Marián

AU - Stulíková, Ivana

AU - Smola, Bohumil

AU - Kudrnová, Hana

AU - Vlach, Martin

AU - Kekule, Tomáš

AU - Szakács, Gábor

AU - Hort, Norbert

AU - Kainer, Karl Ulrich

N1 - Conference code: 23

PY - 2014

Y1 - 2014

N2 - As a potential candidate for a biodegradable implant material, we designed the composition and investigated the properties of the magnesium alloy containing rare earth metals, namely yttrium and neodymium, with an addition of silver showing the evidence of antibacterial effects and promising corrosion rate in a body[2]. The as-cast Mg-2Y-1Nd-1Ag alloy exhibits hard regions of eutectics containing Y, Nd and Ag along the grain boundaries and contains also the long period stacking-ordered structure inside the Mg matrix. The eutectic regions continuously dissolve at 500 °C with increasing time while new particles develop in form of discs embedded in the magnesium matrix parallel to each other within a grain. During this process, an overall microhardness decreases to its minimum value. However, after homogenization annealing at 525 °C neither eutectic regions nor disc-shape particles were revealed in scanning electron microscope even though the microstructure development during the prolonged annealing at 525 °C leads to superior microhardness value. Microhardness measurements, electrical resistivity measurements at low temperature, scanning electron microscopy and synchrotron diffraction methods were used in this work.

AB - As a potential candidate for a biodegradable implant material, we designed the composition and investigated the properties of the magnesium alloy containing rare earth metals, namely yttrium and neodymium, with an addition of silver showing the evidence of antibacterial effects and promising corrosion rate in a body[2]. The as-cast Mg-2Y-1Nd-1Ag alloy exhibits hard regions of eutectics containing Y, Nd and Ag along the grain boundaries and contains also the long period stacking-ordered structure inside the Mg matrix. The eutectic regions continuously dissolve at 500 °C with increasing time while new particles develop in form of discs embedded in the magnesium matrix parallel to each other within a grain. During this process, an overall microhardness decreases to its minimum value. However, after homogenization annealing at 525 °C neither eutectic regions nor disc-shape particles were revealed in scanning electron microscope even though the microstructure development during the prolonged annealing at 525 °C leads to superior microhardness value. Microhardness measurements, electrical resistivity measurements at low temperature, scanning electron microscopy and synchrotron diffraction methods were used in this work.

KW - Biodegradable implants

KW - Magnesium alloys

KW - Mechanical properties

KW - Rare earths

KW - Silver

KW - Engineering

UR - http://www.scopus.com/inward/record.url?scp=84924937706&partnerID=8YFLogxK

M3 - Article in conference proceedings

AN - SCOPUS:84924937706

SN - 9788087294543

SP - 1086

EP - 1091

BT - METAL 2014 - 23rd International Conference on Metallurgy and Materials, Conference Proceedings

PB - TANGER Ltd.

T2 - 23rd International Conference on Metallurgy and Materials, METAL 2014

Y2 - 21 May 2014 through 23 May 2014

ER -