The structural phase transitions of quinary Ti50Ni49.5-XMo0.3Fe0.2AgX (X = 0, 0.1, 0.2, 0.5, 1, and 1.5 at%) alloys prepared by vacuum-induction melting were studied by means of the four-point-probe, X-ray diffraction (XRD), and optical microscopy methods after thermal cycling. The two-stage B2-R-B19' reversible martensitic transformation (MT) took place in all the investigated samples. It is found that the substitution of Ag for Ni in the studied alloy when CAg = 0-0.5 at%, reduces the TR, Ms, and Mf characteristic points by 20-30 K, whereas the latter increases by 15-35 K when the Ag content was varied 1-1.5 at% and the B2-R-B19' MT was realized in the high-temperature area. XRD patterns of the studied alloys recorded at the ambient temperature detected the pure Ag phase as well as Ti2Ni precipitate reflections with a small volume fraction (up to 5%) alongside with structural lines of B2, R, and B19'phases.

We have studied the influence of the surface layer on the parameters of the multiply repeated shape memory effect, developing stresses, characteristic temperatures, and intervals of martensitic...

For the first time, we performed functionalization of the surface of porous titanium nickelide alloys with bambusuril[6]-based macrocyclic compounds by different methods in order to provide the basis for saturation with therapeutic agents to impart antibacterial activity and accelerate its osteogenesis. It has been shown for the first time that the vacuum modification method is preferable for bambusuril deposition, since it provides a uniform deposition of organic matter on both the outer and inner surfaces of the pores. The effect of bambusuril deposition methods on the continuity, structure, and cytocompatibility of the porous titanium nickelide surface was evaluated. In vitro tests proved high biocompatibility and low toxicity of porous TiNi treated with BU[6] under vacuum. The SEM study of the structure of the surface layer of TiNi modified with BU[6] under the vacuum method showed that BU[6] agglomerates are uniformly deposited on the inner and outer surfaces of TiNi pores, which will provide an even saturation of BU[6] cavities with various pharmaceuticals, including antibiotics and inhibitors.