Особенности измерения термоэдс циркониевого сплава с напыленным слоем никеля

Abstract

We investigated vacuum ion-plasma Ni coatings deposited on zirconium by magnetron sputtering. Coatings form a protective film on the surface of the material and reduce the oxidation of the zirconium alloy. The thermal electromotive force method is used as a method for analyzing the materials obtained. The Au-Ni-Zr metals were experimentally selected to control coatings and alloys by measuring the thermal electromotive force. The inversion of the thermal electromotive force (change of sign depending on the hydrogen concentration) allows the critical accumulation of hydrogen in zirconium to be found. The results have shown that the thermal electromotive force of the Zr1Nb zirconium alloy deposited in the form of a film with a thickness of up to 400-500 nm depends on the properties of the alloy and the concentration of hydrogen. The increase in the thickness of the coating up to 2000 nm does not change the thermal electromotive force and corresponds to the values for pure nickel. This coating in combination with the control of the material obtained is promising for the protection of zirconium alloys against corrosion during operation.