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Corrosion and wear-corrosion behavior of NiTi modified by plasma source ion implantation

Paper ID Volume ID Publish Year Pages File Format Full-Text
12333 790 2003 9 PDF Available
Title
Corrosion and wear-corrosion behavior of NiTi modified by plasma source ion implantation
Abstract

The understanding of corrosion behavior in NiTi is critical for the devices using this shape-memory alloy. In order to improve the surface properties of NiTi such as corrosion resistance, plasma source ion implantation (PSII) technique was employed with oxygen as incident ions at three levels of implantation dose (5×1016, 1×1017 and 3×1017 ions/cm−2). Pitting corrosion and wear-corrosion behavior of control and PSII-modified Ti–50.7 at% Ni alloy were evaluated by cyclic potentiodynamic polarization and wear-corrosion measurements. Surface characterization was used to interpret the different corrosion behavior observed between control and oxygen-implanted samples. Results showed that corrosion behavior was influenced by both heat treatment and surface modification. The best pitting corrosion resistance was observed for samples with Af=21°C modified by oxygen implantation at a dose of 1×1017 ions/cm−2. Better wear-corrosion resistance was observed for oxygen-implanted samples.

Keywords
NiTi; PSII; Potentiodynamic polarization; Wear corrosion; Pseudoelasticity
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 24, Issue 22, October 2003, Pages 3931–3939
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us