relation: https://khub.utp.edu.my/scholars/11452/
title: Characterization, adhesion strength and in-vitro cytotoxicity investigation of hydroxyapatite coating synthesized on Zr-based BMG by electro discharge process
creator: Aliyu, A.A.
creator: Abdul-Rani, A.M.
creator: Rao, T.V.V.L.N.
creator: Axinte, E.
creator: Hastuty, S.
creator: Parameswari, R.P.
creator: Subramaniam, J.R.
creator: Thyagarajan, S.P.
description: In this study, biocompatible hydroxyapatite (HA)coatings by HA mixed electro discharge coating (HA-EDC)process was synthesized on the Zr-based bulk metallic glass (BMG)surface. The aim is to promote the cells proliferation by synthesizing a strongly adhered oxide and carbide coating on the Zr-based BMG and blocking the release of Ni and Be in the BMG alloy. Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Spectroscopy (EDX), X-ray Photoelectron Spectroscopy (XPS)and X-ray Diffraction (XRD)were employed to characterize the surface morphology, elemental compositions and the phases present in the electro-discharge coated Zr-based BMG. SEM analysis presented the formation of various micro and nano-sized craters, porosities and cracks on the coated and uncoated BMG surface. The EDX and XPS results depicted the migration of HA elements (Ca, P, O and K)to the workpiece surface, which replaced the Ni and Be in the Zr-based BMG alloy. The SEM cross-section revealed the formation of the nanoporous coating of about 27.2 μm thick and a reduced recast layer thickness. The XRD characterization identified the phases like CaZrO3, ZrO2, Ca5(PO4)3OH, ZrC and TiC formed on the coated BMG surface. A strongly adhered HA coating with adhesive failure of about 132 N load was achieved during the scratch test. A cytotoxicity study using an in-vitro 3-(4,5 dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT)Assay revealed a significant rise in cells viability on the coated Zr-based BMG specimen. © 2019 Elsevier B.V.
publisher: Elsevier B.V.
date: 2019
type: Article
type: PeerReviewed
identifier:   Aliyu, A.A. and Abdul-Rani, A.M. and Rao, T.V.V.L.N. and Axinte, E. and Hastuty, S. and Parameswari, R.P. and Subramaniam, J.R. and Thyagarajan, S.P.  (2019) Characterization, adhesion strength and in-vitro cytotoxicity investigation of hydroxyapatite coating synthesized on Zr-based BMG by electro discharge process.  Surface and Coatings Technology, 370.  pp. 213-226.  ISSN 02578972     
relation: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85065228777&doi=10.1016%2fj.surfcoat.2019.04.084&partnerID=40&md5=b4d2bcb810604d73cb87d49de033122f
relation: 10.1016/j.surfcoat.2019.04.084
identifier: 10.1016/j.surfcoat.2019.04.084