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EIS study of porous NiTi biomedical alloy in simulated body fluid
Author(s) -
Attarchi M.,
Mazloumi M.,
Behckam I.,
Sadrnezhaad S. K.
Publication year - 2009
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.200905212
Subject(s) - sintering , materials science , simulated body fluid , nickel titanium , dielectric spectroscopy , porosity , alloy , metallurgy , electrochemistry , chemical engineering , composite material , shape memory alloy , chemistry , electrode , scanning electron microscope , engineering
The electrochemical impedance spectroscopy was used for monitoring the formation of surface film on a fixtured sintering porous NiTi biomedical alloy in simulated body fluid (SBF) media during 12 days. Effect of NiTi sintering time on the formation of surface film in SBF was investigated. The formed surface film was calcium phosphate hydrate (CPH) with a pillar particulate structure which was developed to a spongy network with increasing the sintering time. Using such electrochemical techniques, it was shown that NiTi samples obtained after 3 h sintering at 950 °C, have higher tendency for the formation of a stable CPH film during the test.