[en] Using Moessbauer spectroscopy, the authors have studied the structural characteristics of the alloy phases of three samples formed by the process of mechanical alloying. The starting compositions of these samples are Fe₇₀B₃₀, Fe₅₅B₄₅ and Fe₃₀B₇₀. The crystallization or transition of the amorphous phases under annealing has also been examined. It was found that a certain relation exist between the amorphous phases and corresponding Fe-B compounds

[en] Crystallization behaviors of Fe₄₀Ni₃₈Mo₄B₁₈, Fe₃₈Ni₃₅Mo₄Si₅B₁₈, and Fe₃₉Ni₃₆Mo₂Si₅B₁₈ (at%) amorphous alloys as well as magnetic properties of the Fe₄₀Ni₃₈Mo₄B₁₈ alloy, annealed in the temperature range from 400 to 520 deg. C for 1 h, have been investigated. The results show that for the samples of Fe₄₀Ni₃₈Mo₄B₁₈, annealed in the temperature range of 430-450 deg. C, a single-crystalline FCC phase with composition near Ni₃Fe solid solution and grain size of about 10 nm precipitates in the amorphous matrix, and the samples exhibit good soft magnetic properties. As the samples are annealed at T _a≥470 deg. C, the magnetic properties drop rapidly, this is mainly due to the formation of Fe-B and Ni-B compounds. For the samples of Fe₃₈Ni₃₅Mo₄Si₅B₁₈ and Fe₃₉Ni₃₆Mo₂Si₅B₁₈, a single FCC crystalline phase structure cannot be formed in the amorphous matrix, where more than single-crystalline phase such as Fe-B compounds as well as γ-(Fe, Ni) phase are precipitated almost simultaneously by the annealing treatment