Deposition of biomimetic biocompatible oxides on metallic glass surface by electro-discharge coating process |
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| Authors: | A A Aliyu A M Abdul-Rani M Al-Amin S Hastuty M A Razak S Ali M Danish S Rubaiee A Bin Mahfouz A N Hamza |
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| Affiliation: | 1. Mechanical Engineering Department, Universiti Teknologi Petronas, 32610 Bandar Seri Iskandar Perak, Malaysia;2. Mechanical Engineering Department, Universitas Pertamina, Kota Jakarta Selatan, Daerah Khusus Ibukota Jakarta, 12220 Indonesia;3. Manufacturing Section, Universiti Kuala Lumpur Malaysian Spanish Institute, Kulim Hi-Tech Park, 09000 Kedah, Malaysia;4. National University of Sciences and Technology, Islamabad, Pakistan;5. Department of Mechanical and Materials Engineering, University of Jeddah, Jeddah, 21589 Saudi Arabia;6. Chemical Engineering Department, University of Jeddah, Jeddah, 21589 Saudi Arabia;7. Department of Electrical Engineering, Kano University of Science and Technology, Wudil, Nigeria |
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| Abstract: | Bulk metallic glass demonstrates superior mechanical properties and excellent bio-mechanical stability compared to routinely used biomaterials like titanium, cobalt-chromium, stainless steel, et cetera. However, the metallic glass surface do not easily adhere to the leaving tissues due to native bio-inert oxide layer, which have poor wear resistance and low hardness. In this current study an innovative method for surface coating of bulk metallic glass by mixing hydroxyapatite powder during electro-discharge machining has been employed. A biomimetic nano-porous bio-ceramic layer of oxides and carbides was deposited on metallic glass surface. The modified surface integrity and composition were investigated by scanning electron microscopy, energy-dispersive x-ray spectroscopy, and x-ray diffraction characterization techniques. The characterization results confirmed the formation of a natural bone-like nano-porous surface topography on the metallic glass surface using a novel hydroxyapatite-mixed electro-discharge coating process. In addition, a favourable surface chemistry in the form of bioceramic carbides (zirconium carbide, titanium carbide) and zirconium oxide layers, was achieved. |
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| Keywords: | bulk metallic glass electro-discharge coating hydroxyapatite implant nanoporous oxides elektrische Entladungsbeschichtung Hydroxylapatit Implantat metallisches Glas nanoporös Oxide |
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