Formation tantalum coating on NiTi surface by magnetron sputtering technique

Larionov, A. S.; Dikov, A S; Жаканбаев, Е. А.

doi:10.1088/1742-6596/2155/1/012005

Cited by 2 publications

(2 citation statements)

References 7 publications

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“…Ta coating synthesis parameters was follow: plasma-forming gas-argon, residual gas pressure in the working chamber-3 × 10 −5 Pa, distance from target to substrate 50 mm. The technique for synthesizing coatings is described in detail elsewhere [35,37] The purpose of this work is the synthesis of tantalum coating in the α-Ta structural state by magnetron sputtering without subsequent heat treatment. To achieve this goal the power on magnetron and time of coating application were varied.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…This will help to reduce stresses at the 'coating-substrate' interface and form a more uniform coating due to easier migration over the substrate surface. In previous works, the effects of a change in the power of magnetron were noted, displayed in a change in the surface morphology, density of the surface layer, shape and size of grains, and a decrease in the oxygen content [30][31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 96%

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Formation of tantalum coatings with a given structure on the surface of niti alloy by magnetron sputter deposition

Akayev¹

2022

Funct. Compos. Struct.

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Way for applying tantalum coating with a given structure to the surface of an alloy with a shape memory effect NiTi to increase the biocompatibility of implants from this alloy is presented. The coating was synthesized by DC-magnetron sputtering. The changes sequence of the structural-phase states depending on the thickness of the coating, that is, the rate of its deposition, has been established. It is shown that at a low magnetron power, ~ 14 W in present study, a single-phase α-Ta coating with a bcc structure and a high degree of perfection of the crystal lattice is successfully synthesized on the titanium nickelide surface.

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Section: Experimental Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Formation of tantalum coatings with a given structure on the surface of niti alloy by magnetron sputter deposition

Akayev¹

2022

Funct. Compos. Struct.

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Surface Modification of NiTi Alloy with Sputtered Tantalum Coatings to Improve its Hardness, Corrosion Resistance and Biocompatibility

Khathim,

Al-Rawi,

Khalaf

2023

Int. J. Nanosci.

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In this research, titanium alloys including smart nitinol (NiTi) were studied. The (NiTi) alloy tends to emitting (Ni) toxic ions due to its low resistance to corrosion within the body conditions over time. For (NiTi) coating process, the magnetron plasma sputtering (DC) technique was used with Aragon gas ratio of (90%) and Oxygen of (10%) in order to coat the alloy with Tantalum and its Oxide (Ta2O5) thin films. This is one of the methods used to improve the biocompatibility and better adhesion stability of the membrane on the (NiTi) surface, since Tantalum and its oxides are biocompatible and are not affected by the body fluids. Hardness, corrosion and biocompatibility were tested. The results showed improvement in the nominated properties using this coating technique. The hardness for the non-coated sample was (630 Kgf/mm2), meanwhile, the coated sample recorded (762 Kgf/mm2) using sputtering power of (25 W) with a thickness of (226 nm). Tantalum and its precipitated oxides on a pillar of thickness (90.4–226 nm) also exhibited a biocorrosion enhancement, when it was immersed in a Simulated Body Fluid (SBF). The corrosion rate for the non-coated sample was (1.204 × 10[Formula: see text]), meanwhile for the coated sample, its value was (3.453 × 10[Formula: see text]) at sputtering power of (15 W), considered as the lower corrosion rate. The scanning electron micrographs also showed an increase in the biocompatibility for the coated nitinol alloys (NiTi) in comparison with the non-coated, ones since it showed a clear formation of Hydroxyapatite (HA) on the sample surface after immersion in the SBF. This behavior was confirmed by the XRD measurements, which presented higher HA peaks on the coated samples surface in comparison with the non-coated samples.

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Formation tantalum coating on NiTi surface by magnetron sputtering technique

Cited by 2 publications

References 7 publications

Formation of tantalum coatings with a given structure on the surface of niti alloy by magnetron sputter deposition

Formation of tantalum coatings with a given structure on the surface of niti alloy by magnetron sputter deposition

Surface Modification of NiTi Alloy with Sputtered Tantalum Coatings to Improve its Hardness, Corrosion Resistance and Biocompatibility

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