The properties of hydroxyapatite ceramic coatings produced by plasma electrolytic oxidation
- Resource Type
- Authors
- Md. Abdul Maleque; Sivakumar Krishnasamy; A.R. Bushroa; Yern Chee Ching; Hari Chandran; U. Sutharsini; Halina Misran; Iis Sopyan; Singh Ramesh; S.A. Adeleke
- Source
- Ceramics International. 44:1802-1811
- Subject
- Materials science
Process Chemistry and Technology
02 engineering and technology
Adhesion
Electrolyte
Plasma electrolytic oxidation
engineering.material
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Coating
visual_art
Materials Chemistry
Ceramics and Composites
visual_art.visual_art_medium
engineering
Surface roughness
Ceramic
Composite material
0210 nano-technology
Porosity
Layer (electronics)
- Language
- ISSN
- 0272-8842
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.