Premium
Study on hemocompatibility and corrosion behavior of ion implanted TiNi shape memory alloy and Co‐based alloys
Author(s) -
Liang Chenghao,
Huang Naibao
Publication year - 2007
Publication title -
journal of biomedical materials research part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.849
H-Index - 150
eISSN - 1552-4965
pISSN - 1549-3296
DOI - 10.1002/jbm.a.31459
Subject(s) - materials science , corrosion , alloy , ion implantation , electrochemistry , shape memory alloy , metallurgy , dissolution , amorphous solid , ion , chemical engineering , electrode , crystallography , physics , chemistry , quantum mechanics , engineering
Biomedical TiNi shape memory alloy and Co‐based alloys were ion implanted, and corrosion resistance and hemocompatibility of these had been investigated with electrochemical method, dynamic clotting time, and hemolysis rate tests. The results indicated that the electrochemical stability and anodic polarization behavior of the materials were improved significantly after ion implantation. When TiNi, Co‐based alloys were implanted Mo + C and Ti + C, respectively, the corrosion potentials were enhanced more than 200 mV, passive current densities decreased, and passive ranges were broadened. Dynamic clotting time of the ion implanted substances was prolonged and hemolysis rate decreased. All the results pointed out that corrosion resistance and hemocompatibility of the alloys were improved by ion implantation, and effects of dual implantation was better than that of C single implantation. X‐ray diffraction analysis of the alloys after dual implantation revealed that TiC, Mo 2 C, Mo 9 Ti 4 , and Mo appeared on the surface of TiNi alloy, and CoC x , Co 3 Ti, TiC, and TiO on the surface of Co‐based alloys. These phases dispersing on the alloy surface formed amorphous film, prevented dissolving of alloy elements and improved the corrosion resistance and hemocompatibility of the alloys. © 2007 Wiley Periodicals, Inc. J Biomed Mater Res, 2007