Electrochemically deposited nano-grained calcium phosphate coatings were produced on titanium alloy substrates using aqueous electrolyte maintained at acidic pH. Different coatings were produced by using different cathodic current densities and/or ultrasonic agitation of the electrolytic bath. The structure of the coatings was characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. Ultrasonated bath produced coatings containing dicalcium phosphate dehydrate and the grain sizes were in the range of 50-100 nm. © 2006 Acta Materialia Inc.

Suresh Krishnamoorthy Seshadri

Biomaterials

current density

Electrodeposition

Electrolytes

Grain size and shape

pH effects

Scanning electron microscopy

Titanium alloys

Transmission electron microscopy

Ultrasonics

X ray diffraction

Calcium phosphate

ELECTROLYTIC BATH

ULTRASONIC AGITATION

Inorganic coatings

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Scripta Materialia

Electrochemically deposited hydroxy apatite (HA) coatings were produced on Ti-6Al-4V substrates using aqueous electrolytes. Different coatings were produced by varying the time periods and the source of calcium. Commercially available calcium nitrate and calcium nitrate produced from calcined sea shell were used as sources of calcium in the electrolysis. Various phases of the coatings were characterised by XRD, TEM and FT-IR. Corrosion tests were performed on the coatings by exposing them to uniform corrosion in Simulated Body Fluid (SBF) for 1 month as well as by electrochemical polarization and ac impedance techniques. These tests indicate that HA coatings produced from sea shell source are superior having rough surface and long-term stability in SBF. © 2005 Elsevier B.V. All rights reserved.

Surface and Coatings Technology

Hydroxy apatite coatings on Ti-6Al-4V from seashell

Using hydroxyapatite nanoparticles and decreased crystallinity to promote osteoblast adhesion similar to functionalizing with RGD

Key Engineering Materials

Different Morphology of Hydroxyapatite Coatings on Titanium by Electrophoretic Deposition

Journal of Biomedical Materials Research Part A

Thin calcium phosphate coatings on titanium by electrochemical deposition in modified simulated body fluid

IEEE Engineering in Medicine and Biology Magazine

Around the world - biomedical engineering in Sweden

Electrochemical nano-grained calcium phosphate coatings on Ti-6Al-4V for biomaterial applications

Journal	Scripta Materialia
ISSN	13596462
Open Access	No