Title :
A Study of ZrN/Zr Coatings Deposited on NiTi Alloy by PIIID Technique
Author :
Cheng, Yan ; Zheng, Y.F.
Author_Institution :
Dept. of Mater. & Nanotechnol., Peking Univ., Beijing
Abstract :
ZrNx/Zr ceramic/metal coatings were deposited onto NiTi shape-memory alloy using plasma immersion ion implantation and deposition technique in order to prolong the service lifetime of NiTi implants in clinical application. The surface characteristics and microstructure were investigated by atomic force microscope, X-ray diffraction, and X-ray photoelectron spectrometry. The results showed that the coating surface has a mean roughness of 7.487 nm and root-mean-square roughness of 9.065 nm over the area the image and a cubic face-centered lattice of NaCl-type ZrN0.83 coating was obtained. The electrochemical test demonstrated that the ZrN0.83 /Zr coating can greatly improved the corrosion-resistant property in Hank´s solution, which has a great significance for the biomedical application of NiTi alloy
Keywords :
X-ray diffraction; X-ray photoelectron spectra; atomic force microscopy; bioceramics; corrosion protective coatings; corrosion resistance; crystal microstructure; electrochemistry; plasma deposited coatings; plasma deposition; plasma immersion ion implantation; prosthetics; surface roughness; zirconium; zirconium compounds; Hank solution; NaCl-type zirconium nitride coating; NiTi; PIIID method; X-ray diffraction; X-ray photoelectron spectrometry; ZrN-Zr; atomic force microscope; biomedical implant; ceramic-metal coatings; corrosion-resistance; cubic face-centered lattice; electrochemical test; microstructure; plasma immersion ion implantation-deposition technique; root-mean-square roughness; shape-memory alloy; surface roughness; Atomic force microscopy; Ceramics; Coatings; Implants; Plasma immersion ion implantation; Rough surfaces; Shape memory alloys; Surface roughness; X-ray imaging; Zirconium; Coating; NiTi alloy; ZrN; corrosion resistance;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2006.877502
