Electrochemical characterization of hot pressed CoCrMo-HAP biocomposite in a physiological solution

• Type: Article in International Scientific Journal
• Date: 2015

Authors

Ribeiro, AM (Author) Other; Alves, AC (Author) Other; Silva, FS (Author) Other; Toptan, F (Author) Other

Journal

The Journal is awaiting validation by the Administrative Services.

Title: MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION

Vol. 66

Pages: 790-795

ISSN: 0947-5117

Indexing

ISI Web of Knowledge - 6 Citations

Scopus - 8 Citations

Other information

Authenticus ID: P-00G-FJ3

DOI: 10.1002/maco.201407885

Abstract (EN): Hydroxyapatite (HAP) coatings are being widely used on implant materials in order to improve the bioactivity, however, failure at the implant/coating interface is still a major concern. Functionally graded metal matrix composite structures, on the other hand, are being considered as an alternative to the coatings. The present study aims to study the corrosion behaviour of CoCrMo matrix 10% (vol.) HAP reinforced composites processed by hot pressing technique. Electrochemical tests consisting of potentiodynamic polarization and electrochemical impedance spectroscopy were performed in phosphate buffer saline solution at body temperature. The corroded surfaces were analysed by field emission gun scanning electron microscope equipped with energy dispersive X-ray spectroscopy. Electrochemical studies and microstructural investigations of the corroded surfaces revealed that HAP particle addition resulted in localized corrosion on the surface discontinuities including gaps at the matrix/reinforcement interface and the pore sites near the interface.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6