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The properties of hydroxyapatite ceramic coatings produced by plasma electrolytic oxidation

Adeleke, Sakiru Adekunle and Ramesh, Singh and Bushroa, Abdul Razak and Ching, Yern Chee and Sopyan, Iis and Maleque, Md. Abdul and Krishnasamy, Sivakumar and Chandran, Hari and Misran, Halina and Ubenthiran, Sutharsini (2018) The properties of hydroxyapatite ceramic coatings produced by plasma electrolytic oxidation. Ceramics International, 44 (2). pp. 1802-1811. ISSN 0272-8842

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Calcium phosphate coatings produced on the surface of Ti6Al4V by plasma electrolytic oxidation (PEO) using different concentrations of hydroxyapatite (HA) in a 0.12 M Na3PO4 (NAP) electrolyte solution was investigated. It was found that the amount of calcium phosphate particles infiltrated into the coating layer as well as the thickness and the surface roughness of the coating increased with increasing HA concentration. The porosity of the ceramic coatings indicated an inverse relationship with the concentration of HA particles dispersed in the NAP solution. The result also demonstrates that higher scratch adhesive strength was achieved using 1.5 g/L HA solution, producing a critical load of 2099 mN, while 0 g/L HA only produced a critical load of 1247 mN. The adhesion becomes independent of thickness when the concentration of HA exceeds 1.5 g/L. The failure of the coating was characterized by large periodic hemispherical chipping, while intermittent delamination was noticed with the coating embedded with HA particles. This study demonstrate the viability of using PEO to produce a thin layer of HA ceramic coating on Ti6Al4V suitable for biomedical applications.

Item Type: Article (Journal)
Additional Information: 4809/62784
Uncontrolled Keywords: Hydroxyapatite, coating, plasma electrolytic oxidation
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA401 Materials of engineering and construction
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User: PROF. DR. IIS SOPYAN
Date Deposited: 21 Mar 2018 09:12
Last Modified: 26 Apr 2018 11:47
URI: http://irep.iium.edu.my/id/eprint/62784

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