Effect of HAP decomposition on the corrosion behavior of Ti-HAP biocomposites

Ti-HAP biocomposites are gained attention for combining the attractive properties of Ti and hydroxyapatite (HAP). However, the decomposition of HAP at elevated processing temperatures is a major concern since it can lead to structural flaws and may deteriorate the corrosion resistance of Ti. The pre...

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Bibliographic Details
Main Author: Toptan, Fatih (author)
Other Authors: Alves, Alexandra Manuela Vieira Cruz Pinto (author), Ferreira, Margarida A. (author), da Silva Oliveira, Catarina I. (author), Pinto, A. M. P. (author)
Format: article
Language:eng
Published: 2018
Subjects:
corrosion
hydroxyapatite
powder metallurgy
titanium
Science & Technology
Online Access:http://hdl.handle.net/1822/66309
Country:Portugal
Oai:oai:repositorium.sdum.uminho.pt:1822/66309
Description
Summary:Ti-HAP biocomposites are gained attention for combining the attractive properties of Ti and hydroxyapatite (HAP). However, the decomposition of HAP at elevated processing temperatures is a major concern since it can lead to structural flaws and may deteriorate the corrosion resistance of Ti. The present study aims to investigate the corrosion behavior of Ti-HAP composite processed by powder metallurgy by performing potentiodynamic polarization and electrochemical impedance spectroscopy in 0.9wt% NaCl solution at body temperature. Results show that the presence of Ti lowers the HAP decomposition temperatures resulting in the formation of HAP-depleted zones acting as electrochemically active sites, decreasing the corrosion resistance.

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