Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 International Letters of Chemistry, Physics and Astronomy

2 2015

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Improvement in Surface Properties of Ti6Al4V Alloy by ZrN Thin Film

Kadam S. N., Jagdeo R. K., Nair M. R.

International Letters of Chemistry, Physics and Astronomy

2015

Vol. 45

59--65

Ti6Al4V alloy is attracting attention as a biomaterial due to its excellent mechanical properties, corrosion resistance and super plasticity. However; this alloy contains aluminium and vanadium liable to do serious harm to human bodies. For overcoming surface originated problems, various surface modification techniques have been used on metallic implants. In this study cathodic arc PVD was used to produce ZrN coating with different substrate bias voltage at 20mttor nitrogen gas pressure. Corrosion resistance of Ti6Al4V and ZrN coated Ti6Al4V were investigated by an electrochemical test, at 370C in normal saline solution. Tafel extrapolation method was used for calculating corrosion rate. ICP-AES studies were carried out to determine amount of ions leached out from samples when kept immersed in normal saline solution. The surface morphology was carried out by XRD. The ZrN coated samples showed variation in the corrosion resistance with varying voltage and the sample coated at -200V showed an optimum corrosion resistance.

Characterization of Nitrogen Implanted Pure Ti in Normal Saline (0.9% NaCl) Solution

Kadam S., Jagdeo R. K., Nair M. R.

International Letters of Chemistry, Physics and Astronomy

2015

Vol. 43

34--40

Metallic biomaterial like stainless steel, Co-based alloy, Ti and its alloy are widely used as artificial hip joints, bone plates and dental implants. However; this alloy releases ions from the surface liable to do serious harm to human bodies. For overcoming surface originated problems, various surface modification technique have been used on the metallic implants. In this study, the nitrogen was implanted by a process of ion implantation at 60 keV with different fluences of 1 x 1016, 5 x 1016, 1x1017 and 5 x 1017 ions/cm2. Corrosion resistance of Ti and ion implanted Ti were investigated by an electrochemical test, at 37°C in normal saline solution. Tafel extrapolation method was used for calculating corrosion rate. ICP-AES studies were carried out to determine amount of ions leached out from samples when kept immersed in normal saline solution. Corrosion stability and elemental out-diffusion resistance was found to be increased by nitrogen ion implantation. The implanted samples showed variation in the corrosion resistance with varying doses and the sample implanted at 1 X 1017 ions/cm2 showed an optimum corrosion resistance.