Investigation of the influence of ion-plasma treatment on mechanical properties of zirconium alloy Zr1Nb
Keywords:
ion-plasma coatings, ion implantation, zirconium alloys, mechanical properties, tensile testAbstract
The paper presents the results of the effect of ion-plasma treatment (IPT), which includes ion-plasma deposition of coatings and ion implantation. The mechanical properties of the segments of zirconium alloy Zr1Nb tubes after IPT were studied. Were obtained by single-layer (TiN), multilayer (Ti + TiN)x, (Zr + ZrN)x, and multicomponent nanostructured TiAlN, TiAlSiN, TiAlYN coatings. A series of samples was implanted by ions Zr+, Mo+, N2+ and O2+. After IPT, the samples were tested in tension. Deposition of ion-plasma coatings increases the tensile strength σB from 12 to 21% at 350 °C, and the yield strength σ0,2 remains unchanged. After ion implantation significantly increased (to 16%) yield strength σ0,2. It is shown that the investigated coatings thickness of about 5 microns have high hardness (45 GPa), and after IPT the hardness and elastic modulus are increased.