What is it about?

Ti-Zr-Ni alloys are known as efficient hydrogen accumulators, but its other properties are poorly understood. This work presents a study of their electrical conductivity. These alloys demonstrates the formation of a wide range of phases: amorphous state, quasi-crystalline, crystalline phases-proximants, Laves phase and solid solutions. An impressive influence of the structural state on electrical conductivity of Ti41Zr41Ni18 coatings was revealed. The course of the temperature dependence of electrical conductivity can vary from increasing to decreasing depending on the heat treatment of the coating. With the same chemical composition of the alloy, we have a significantly different electrical resistance of the film when the temperature decreases, depending on the phase composition. The work contains the first study of the structure of the Ti41Zr41Ni18 alloy in the film state after various heat treatments.

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Why is it important?

The data presented in the paper will be useful for understanding the nature of little-studied quasicrystals and approximant phases. Ti-Zr-Ni alloys can be a material for manufacturing wires with stable resistance, thermoelectric converters. Developers of such devices need a detailed study of the "processing-structure-properties" connection of this material.


In addition to unusual electrical properties, the Ti41Zr41Ni18 alloy also has other interesting physical properties. It is resistant to high-energy plasma and radiation exposure, it can change its mechanical properties in a wide range. This makes it promising for developing new stable sensors and devices for extreme conditions using it.

Ihor Kopylets
Natsional'nij tekhnichnij universitet Kharkivs'kij politekhnichnij institut

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This page is a summary of: Electrical resistivity of coatings of quasicrystalline and crystalline phases of the Ti—Zr—Ni system in the temperature range 4–300 K, Low Temperature Physics, November 2023, American Institute of Physics,
DOI: 10.1063/10.0021368.
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