Properties of nanostructured titanium nickelide and composite based on it

Nasakina, E. O.; Баикин, А. С.; Sevostyanov, M. A.; Колмаков, А. Г.; Zabolotnyi, V. T.; Солнцев, К. А.

doi:10.1134/s0040579514040071

Cited by 16 publications

(11 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…During short-term tests [42], we believed that the slope of time-dependent concentration curves decreased gradually in all media, flattening out because of the termination of metal etching from the surface. It was so in general, however, the long-term investigation showed small The greater ion release from samples of a single type is observed in the most acidic medium (Figure 8), which abruptly drops with increasing pH and again increases in the NaCl solution.…”

Section: Shape Memory Alloys -Fundamentals and Applicationsmentioning

confidence: 95%

“…In previous researches [42], a release of ions both of nickel and of titanium was observed; in the most acidic environment, the Ni released is about 1.5-2 times more (however, both concentrations are small, and the titanium concentration is not toxic for an organism), at pH 3.56 nickel concentration was 2-4 times more, and in other solutions titanium was not revealed which is consistent with literary data about its consumption on a passive film formation [8,9,42].…”

Section: Shape Memory Alloys -Fundamentals and Applicationsmentioning

confidence: 98%

“…We used a neutral 0.9 wt% solution of sodium chloride, artificial plasma, and four standard buffer solutions (to reproduce acidic and alkaline media at the given level) [8,9,42], which are listed in Table 2, and for comparison, we also used a 0.03-M solution of hydrochloric acid. The standard buffer solutions were prepared from corresponding standard trimetric substances (fixanals) made by Merk (USA).…”

Section: Shape Memory Alloys -Fundamentals and Applications 88mentioning

confidence: 99%

“…Because the used buffer solutions were not physiological media and served only for formation of the required pH, their effect on the alloy was compared with the effect of hydrochloric acid [42]. The wire surface after long holding in HCl solution (Figure 9d) is more like the surface after holding in the physiological saline than in the acidic buffer, and the change in diameter (Table 3) is significantly less than that in a solution with pH 1.68.…”

Section: Shape Memory Alloys -Fundamentals and Applicationsmentioning

confidence: 99%

See 3 more Smart Citations

Applications of Nanostructural NiTi Alloys for Medical Devices

Nasakina¹,

Sevostyanov²,

Баикин³

et al. 2017

Shape Memory Alloys - Fundamentals and Applications

View full text Add to dashboard Cite

New nanostructural shape memory alloy (55.91 wt% of Ni and 44.03 wt% of Ti) for the production of minimally invasive implantation medical devices (stents) was tested for corrosion resistance under static conditions by dipping it into solutions with various acidities (pH from 1.68 to 9.18) for 2 years, for static mechanical properties and for biocompatibility. The material for investigations was 280-μm wires before and after thermal treatment at 450°C for 15 min in air and surface mechanical treatment. The characteristic image and size of grains were determined using the transmission electron microscope (TEM), and the phase composition; surface morphology; and the layer-bylayer composition were investigated using an X-ray diffractometer; a scanning electron microscope (SEM); and an Auger spectrometer. The nickel release from the investigated nanostructural nitinol is less in comparison with data for microstructural nitinol in a solution of any acidity. Dissolution in the alkali medium is absent. A significant retardation of the nickel ion release (and insignificant concentration as a whole) and the absence of titanium ion release in the weakly acidic and neutral solutions with polished samples are observed. A simultaneous 7-11% increase in strength and plasticity in comparison with microstructural nitinol was attained. Toxicity of samples has not been revealed.

show abstract

Section: Shape Memory Alloys -Fundamentals and Applicationsmentioning

confidence: 95%

Section: Shape Memory Alloys -Fundamentals and Applicationsmentioning

confidence: 98%

Section: Shape Memory Alloys -Fundamentals and Applications 88mentioning

confidence: 99%

Section: Shape Memory Alloys -Fundamentals and Applicationsmentioning

confidence: 99%

See 2 more Smart Citations

Applications of Nanostructural NiTi Alloys for Medical Devices

Nasakina¹,

Sevostyanov²,

Баикин³

et al. 2017

Shape Memory Alloys - Fundamentals and Applications

View full text Add to dashboard Cite

show abstract

“…When such devices operating and installing in the body, less destruction of the implant itself and tissue damage are ensured [1][2][3]. These properties are best manifested in titanium nickelide, but the composition of this material includes toxic nickel that can influence surrounding tissues directly from the surface of the implant or be released into physiological environments as a result of corrosion, leading to both destruction of the product and to damage of the body [4][5][6][7][8][9][10][11][12][13]. At the same time, it is possible to develop nickel-free alloys with a shape memory effect and superelasticity.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Characteristics of Non-nickel Shape Memory Alloy of Medical Appointment

Nasakina¹,

Kaplan²,

Konushkin³

et al. 2018

dteees

View full text Add to dashboard Cite

Abstract. New shape memory alloy (Ti-20Nb-10Ta-5Zr) for production of minimally invasive implantation medical devices (cava filter) was tested for static mechanical properties. The material for investigations was wires with different thickness before and after thermal treatment in various conditions and surface mechanical treatment. The structure was investigated on a scanning electron microscope and on a Auger spectrometer. High indicators of strength and ductility were noted. The mechanical treatment of the surface and annealing in vacuum best affect it.

show abstract

Biocompatibility of new materials based on nano-structured nitinol with titanium and tantalum composite surface layers: experimental analysis in vitro and in vivo

Sevostyanov

Nasakina

Баикин

et al. 2018

J Mater Sci: Mater Med

View full text Add to dashboard Cite

A technology for obtaining materials from nanostructured nitinol with titanium- or tantalum-enriched surface layers was developed. Surface layers enriched with titanium or tantalum were shown to provide a decrease in the formation of reactive oxygen species and long-lived protein radicals in comparison to untreated nitinol. It was determined that human peripheral vessel myofibroblasts and human bone marrow mesenchymal stromal cells grown on nitinol bases coated with titanium or tantalum-enriched surface layers exhibit a nearly two times higher mitotic index. Response to implantation of pure nitinol, as well as nano-structure nitinol with titanium or tantalum-enriched surface layers, was expressed though formation of a mature uniform fibrous capsule peripherally to the fragment. The thickness of this capsule in the group of animals subjected to implantation of pure nitinol was 1.5 and 3.0-fold greater than that of the capsule in the groups implanted with nitinol fragments with titanium- or tantalum-enriched layers. No signs of calcinosis in the tissues surrounding implants with coatings were observed. The nature and structure of the formed capsules testify bioinertia of the implanted samples. It was shown that the morphology and composition of the surface of metal samples does not alter following biological tests. The obtained results indicate that nano-structure nitinol with titanium or tantalum enriched surface layers is a biocompatible material potentially suitable for medical applications.

show abstract

Properties of nanostructured titanium nickelide and composite based on it

Cited by 16 publications

References 10 publications

Applications of Nanostructural NiTi Alloys for Medical Devices

Applications of Nanostructural NiTi Alloys for Medical Devices

Mechanical Characteristics of Non-nickel Shape Memory Alloy of Medical Appointment

Biocompatibility of new materials based on nano-structured nitinol with titanium and tantalum composite surface layers: experimental analysis in vitro and in vivo

Contact Info

Product

Resources

About