Preparation of a nanostructured shape-memory composite material for biomedical applications

Biocompatible composites obtained using the magnetron sputtering for the production of minimally invasive implantation medical devices (stents) were investigated. Nano-and microdimensional surface layers of Ta, Ti, Ag, and Cu on flat and wire NiTi, Cu, Ti, and SiO 2 substrates were created. The phase composition, surface morphology, and the layer-by-layer composition were investigated on an X-ray diffractometer, SEM, and Auger spectrometer. It was shown that the thickness and the structure of surface layers were affected by the sputtering distance, time, power, and the bias voltage at the substrate. The presence of the transition layer that contains both substrate and target elements and provides high adhesion of the surface layer to the substrate has been demonstrated. The material was tested for corrosion resistance under static conditions by dipping into solutions with various acidities (pH from 1.68 to 9.18) for 2 years, static mechanical properties, and biocompatibility in vitro and in vivo. A slight corrosive dissolution was observed only in a medium with a pH of 1.56. Dissolution in the other media is absent. An increase in strength and plasticity in comparison with substrate was attained depending on the nature of the sputtered substance and substrate. Toxicity of samples has not been revealed.

show abstract

“…Chapter is partially based on the results of earlier published works [35][36][37], and authors have the permission to re-use it.…”

Section: Acknowledgementsmentioning

confidence: 99%

Using of Magnetron Sputtering for Biocompatible Composites Creating

Nasakina¹,

Sevostyanov²,

Баикин³

et al. 2019

Advances in Composite Materials Development

View full text Add to dashboard Cite

show abstract

“…One of the advanced materials which can cope with thermal buckling in composite structures is SMAs that have been widely used for different applications during the last decade (Abid et al 2019;Guida et al 2019;Jhou et al 2018;Nasakina et al 2015). SMAs are referred to a set of alloys that are capable of recovering the permanent deformations and strains applied to them and eventually returning to their original form.…”

Section: Introductionmentioning

confidence: 99%

A comparison between the effects of shape memory alloys and carbon nanotubes on the thermal buckling of laminated composite beams

Kamarian

Bodaghi

Barbaz‐Isfahani

et al. 2020

Mechanics Based Design of Structures and Machines

View full text Add to dashboard Cite

One of the essentials for designing composite structures exposed to heat is the correct choice of reinforcing materials. In the present research work, a comparison is made between the performances of two well-known advanced materials, Shape Memory Alloys (SMAs) and Carbon Nanotubes (CNTs), in thermal bucking behavior of thin composite beams with simply supported boundary conditions. First, the effect of embedding SMA wires on the thermal buckling of laminated composite beams are examined. The stability equations are derived based on Timoshenko Beam Theory (TBT), and the critical buckling temperatures are obtained analytically. The advantages and disadvantages of using SMA wires as well as their proper functional range are studied. Then, in the next step, the influence of CNTs on the thermal buckling response of composite beams is presented. To this end, the results of some experiments such as Dynamic Mechanical Thermal Analysis (DMTA) and Thermo-Mechanical Analysis (TMA) tests are used to obtain thermal properties of CNT-reinforced composite materials. The performance of CNTs is also evaluated in comparison with SMA wires. It is found from the analysis that, depending on the structural conditions, one reinforcing material can outperform the other. Finally, the idea of simultaneous use of both reinforcing materials comes up. The results show that, in some circumstances, the use of only one of the SMAs or CNTs does not have significant effect on the thermal buckling of composite beams, but applying both of these advanced reinforcing materials in the composite medium can extraordinarily enhance the critical buckling temperatures.

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

Preparation of a nanostructured shape-memory composite material for biomedical applications

Cited by 15 publications

References 13 publications

Using of Magnetron Sputtering for Biocompatible Composites Creating

Using of Magnetron Sputtering for Biocompatible Composites Creating

A comparison between the effects of shape memory alloys and carbon nanotubes on the thermal buckling of laminated composite beams

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

Contact Info

Product

Resources

About