The use of sintered silver-hydroxyapatite powder added electrodes in electrical discharge machining of Ti-6Al-4 V
Damla Ozdemir, B Ekmekci
article (Uluslararası, Hakemli) | Yazar(lar): Damla Ozdemir, B Ekmekci | Yıl: 2023 | Dergi/Kurum: PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE | İndeks: WOS.SCI | DOI: 10.1177/09544054221112149 | Anahtar Kelimeler: Electrical discharge machining, EDM, powder metallurg
Al and V ion release from the Ti-6Al-4 V implants due to the long-term interactions with body fluids can cause diseases such as Alzheimer's, neuropathy, and osteomalacia. Therefore, it is aimed to increase the bonding and biocompatibility between bone and implant by changing the surface roughness, topography, and chemical composition of Ti-6Al-4 V alloy with different physical, chemical, and mechanical methods. The study proposes to obtain a porous surface coated with Ag-Ca-P on a Ti-6Al-4 V workpiece by the use of sintered silver-hydroxyapatite powder added to electrodes in Electrical Discharge Machining. Micronized silver and hydroxyapatite powders were mixed in different proportions by volume using the powder metallurgy method to achieve the proposed aims. A parametric experimental study was conducted and the surface properties of the treated samples were analyzed by optical microscopy, scanning electron microscopy, energy dispersion spectroscopy, and X-ray diffractometry. The results have confirmed the formation of a porous silver-hydroxyapatite-rich layer on the electrical discharged machined Ti-6Al-4 V surfaces. Therefore, it has been concluded that electrical discharge machining is a promising alternative method for obtaining biocompatible functional surfaces.