Abstract
Bulk metallic glasses (BMGs) have exceptional biomechanical characteristics like low elastic modulus, outstanding fracture strength, superior wear and corrosion resistance compared to routinely used biomaterials. The major downside of BMG is its inability to osteointegrate to the surrounding living tissues. To solve this problem, a biocompatible and bone-like nanoporous layer are normally imparted on the implant surface. In this study, a very hard, biocompatible and nano-porous layer was deposited on the Zr-based metallic glass surface, by hydroxyapatite mixed electrical discharge machining (HA-EDM). FESEM was employed to observe the pore distribution, geometry, and sizes. The result reveals the formation of rough, narrow craters and interconnected nanoporosities in the range of 558.2 nm to 893 nm in diameter and surface area of 244764 nm2 to 626596 nm2. However, the XRD and EDX characterization revealed the deposition of ZrC, TiC and CaTiO3 on the HA-EDMed surface. The surface produced by HA-EDM is expected to facilitate higher tissue in-growth and bone-implant adhesion.
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