Akademik Məlumat İdarəetmə Sistemi
Metallofizika i Noveishie Tekhnologii, vol.23, no.9998, pp.124-136, 2001 (SCI-Expanded, Scopus)
The 'AB' and Be-'AB'-Y transition metal compound melt-spun ribbons have been produced both in IMPh, N.A.S.U., Kyyiv and CECM CNRS, Vitry, where 'A'=(Ti, Zr, Nb, Hf) and 'B'=(Ni, Cu, Co, Pd, Ag, Al). The simple crystallization step (SCS) in the continuous heating regime {(-150-+50)°C→ →(570-600)°C, 1 min} has been used for transformation of the amorphous ribbon into the crystalline state and thermodynamic property measurement. Very often, the SCS is not enough for the restoration of the shape memory property of the multicomponent alloys in the initially bulk amorphous state and various heat treatment regimes should be used. The heat treatment regimes chosen for the crystallization and microstructure formation are discussed. Specific temperatures obtained from typical variation of the heat flow from amorphous ribbons during the first heating run in the DSC camera up to 600°C were taken into account. The chemical composition of some developed multicompoment alloys varies around the 'deep cutectic' composition range and, so, their melting temperature may be sharply decreased. This factor is also to be taken into account for defining of the upper temperature limit for the heat treatment regimes. The crystallization process during the isothermal pre-annealing at TA