1986

The crystallographic characteristics and the equilibrium ratios for solid solutions containing 33 and 50 at% boron which belong to the Fe-Ni-B system are described. The study was carried out on samples obtained by diffusion at 1073 K, of mixtures of the elements in powder form. It was possible to confirm the existence of a complete solid solution between the compounds Fe2B and Ni2B.

A study has been made of the preferential distribution between the phases (M', M″)2B and (M M″)B present in the two-phase fields of the M'-M″-B systems for the transition metals with atomic numbers between 24 and 28. It has been ascertained that the metal with the smaller atomic number is systematically concentrated in the phase richer in boron.