The penetration of He atoms into amorphous films which had been stretched to fracture in liquid He was investigated. It was found that He atoms penetrated into the eutectic alloy films, Pd84.5Si15.5 and Ni78Si8B14, at 0.5K in 3He and at 4.2K in 4He, respectively. The spectra of He liberation after deformation were obtained by means of dynamic annealing (4 to 5K/mm, 293 to 1323K). The maximum amount of He was observed in regions of local plastic micro-shear which ran across the entire width of the films, and in regions which contained fracture macro-cracks and isolated groups of slip bands. The spectra of He liberation from various regions of the samples exhibited several peaks that were related to the crystallization temperatures and melting points of the films. The results were interpreted in terms of the mechanochemical penetration of He atoms through dynamically excited dislocation-like defects; which were typical of the present amorphous films.

Mechanochemical Penetration of Helium Atoms into Pd84.5Si15.5 and Ni78Si8B14 Eutectic Amorphous Films Extended in Liquid 3He and 4He. O.V.Klyavin, B.A.Mamyrin, L.V.Khabarin, Y.M.Chernov, V.Z.Bengus, E.D.Tabachnikova, S.E.Shumilin: Fizika Tverdogo Tela, 2000, 42[7], 1256-60 (Physics of the Solid State, 2000, 42[7], 1294-8)