Effect of nitrogen ion implantation on the structure and corrosion resistance of OT-4-0 titanium alloy

ABSTRACTThe effects of nitrogen ion implantation of Ti-6AI-4V alloy on growth of Pseudomonas aeruginosa bacteria on surfaces of the alloy have been investigated. Results for ion implanted samples were compared with controls with similarly smoothly polished surfaces and with controls that had intentionally roughened surfaces. The test consisted of exposing sterile alloy samples to a microbiological broth, to which 24 hour-old cultures of Pseudomonas aeruginosa had been added. After bioassociation at normal temperature 37°C, bacteria adhering to the surface were fixed and treated with a new ruthenium tetroxide staining method, and quantified by use of scanning electron microscopy (SEM), back-scattered electron imaging and EDAX energy dispersive microanalysis. For smooth samples of the alloy, after a 12 hour growth period, the retained bacteria (revealed by the biologically incorporated ruthenium), decreased monotonically with nitrogen dose out to a total fluence of approximately 7 × 1017/cm2 in an affected depth of approximately 0.1500 μm. The SEM confirmed that the Pseudomonas aeruginosa adhered equally to control materials. The ruthenium studies revealed that the amount of bacterial adhesion is indirectly proportional to the nitrogen ion implantation of the titanium. The greater the percentage of nitrogen ion implantation in the titanium alloy, the less bacteria colonized the disk.

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Analysis of nitrogen ion implantation on the corrosion resistance and mechanical properties of aluminum alloy 7075

Journal of Physics Conference Series ◽

10.1088/1742-6596/1436/1/012075 ◽

2020 ◽

Vol 1436 ◽

pp. 012075

Author(s):

Sophie Hapsari ◽

Tjipto Sujitno ◽

Haerul Ahmadi ◽

Suprapto ◽

Rizky Abdul Aziz

Keyword(s):

Mechanical Properties ◽

Corrosion Resistance ◽

Aluminum Alloy ◽

Ion Implantation ◽

Nitrogen Ion Implantation ◽

Nitrogen Ion ◽

Aluminum Alloy 7075

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Ion Implantation as a Tool for Improving the Properties of Orthopardic Alloys

MRS Proceedings ◽

10.1557/proc-55-253 ◽

1985 ◽

Vol 55 ◽

Cited By ~ 2

Author(s):

P. A. Higham

Keyword(s):

Stainless Steel ◽

Titanium Alloy ◽

Ion Implantation ◽

Treatment Method ◽

Fatigue Properties ◽

Wear Properties ◽

Nitrogen Ion Implantation ◽

Polarization Studies ◽

Nitrogen Ion ◽

Ion Species

ABSTRACTIon Implantation is emerging as a specialized surface treatment method by which orthopaedic alloys can be doped in order to modify for corrision, fatigue and wear properties.In this paper alterations in the corrosion and fatigue resistance of 316LVM stainless steel and Ti 6A1-4V ELI titanium alloy are considered. The effect of various variables was investigated; ion species, flux, accelerating voltage.Changes in corrosion resistance were monitored by performing anodic polarization studies in deaerated 0.1M NaCi solution at 22°C. The most effective species were found to be tantalum and boron for improvements to stainless steel.Fatigue properties were investigated using a Wohler type rotating bend test. Preliminary results show that nitrogen ion implantation improved the fatigue life for the steel but not the titanium alloy. Indications were found to suggest that time since implantation affect the fatigue properties.

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