Positron annihilation analysis of nanosized metal coatings Zr/Nb after He+ ion irradiation

Abstract

New technologies for obtaining structural materials resistant to hydrogen and radiation damage are pressing problems of materials science. Hydrogen damage and radiation degradation are important factors limiting the fatigue life of structural materials. One promising alternative in the development of radiation-hydrogen resistant materials with improved physical and mechanical properties is the application of nanoscale metal systems (NMS). The present work is devoted to the study of the defect structure of Zr/Nb NMS with a thickness of separate layers of Zr and Nb of 100±10 nm after irradiation by He+ ions with doses from 3⸱1016ions/cm2 to 3⸱1017 ions/cm2 using positron annihilation spectroscopy and XRD analysis.