Origin of grey spots on the surface of metallic glasses under Ar+ ion irradiation: The surface and volume properties

Resistance to He2+ irradiation damage in metallic glass Ta38Ni62

“…Its extent of application is expanding into the electronics, industrial, machinery, and other fields, and it has attracted much attention and research interest [6][7][8]. Because metallic glass has material characteristics without lattice defects [9], the study of its resistance to irradiation damage is of great interest [10][11][12][13]. Metallic glass has a good irradiation resistance below its crystallization temperature [14].…”

Enhancement of local superconductivity in ferromagnetic FeCrB metallic glass by Ar+ion irradiation

“…Their x-ray patterns are represented by a bright diffusive maximum (halo) centred at ∼ 34.5 • and a background with fluctuation maxima of diffusive character (figure 2). The comparative analysis of the basic fractions of structure for an amorphous alloy was carried out using the known tabular data for crystalline phases of this material [15,16].…”

“…Diffraction maxima appear as a consequence of the interference of x-rays scattered by fragments of the same type, in parallel located planes, belonging to the atomic groupings of the mesoscopic scale, i.e. to the clusters of the sizes ranging from several tens up to several hundreds of angstrom, with smeared peripheral areas [16]. Three phases, metallic α-Fe-Cr, metastable orthorhombic o-Fe 3 B, and tetrahedral t-Fe 3 B phase are shown on the diffraction patterns (figure 2).…”

“…After irradiation, the maximal size of the Fe-Cr clusters decreases down to 130-150 Å, because large clusters in disordered medium are sources of considerable internal stresses [21] and the relaxation of these stresses is realized under decrease in size of the clusters. The central part of a cluster with D = 150 Å in size and h = D/3 = 50 Å [16] in thickness contains 12α-Fe planes. The peripheral area comprises 6α-Cr planes around the central part.…”

“…The resonance lines (1) and ( 3) are much more intense in the irradiated sample, while the line (2) has practically the same magnitude. After irradiation, due to a decrease in the volume of intercluster disordered medium [16], the broad absorption band at H res ∼ 3300 Oe no longer can be distinguished from the intense line (3).…”