Влияние плазменного высокочастотного индукционного разряда на физико-химические свойства дисперсной системы Ti – Fe – Ni, полученной электрохимическим способом

Abstract

The Ti – Fe – Ni dispersed system was synthesized by the method of contact exchange on the surface of dispersed titanium in an aqueous chloride-containing solution of iron and nickel. The morphology and composition of the surface, as well as the actual phase composition of the Ti – Fe – Ni dispersed system before and after plasma treatment, have been studied by X-ray phase analysis, scanning electron microscopy and Auger spectroscopy. It is shown that on the surface of titanium microparticles, separate spherical subindividuals and their agglomerates are formed, characterized by nanosizes (100 – 200 nm). It was also found that the Ti – Fe – Ni system contains highly distorted metallic phases of iron and nickel, as well as a hydride phase of TiH2, which practically do not undergo phase transformations as a result of the passage of low-pressure argon through an inductively coupled plasma discharge. It is shown that the metallic phases of titanium, iron, and nickel are characterized by the presence of a thin oxide film on the particle surface, and the total content of the oxide phase in the samples does not exceed 1.5 wt. %. The treatment of the Ti – Fe – Ni system microparticles by high frequency induction discharge in low-pressureargon leads to small changes in the content of phases, the lattice constant and the microstructure of the system under study.It indicates a certain solubility of elements in each other and a greater crystallinity of the phases relative to those in particles untreated by plasma.