Magnetic Properties, Crystallization and Embrittlement of Amorphous Fe80B13C7 and Fe80B13Si7 Alloys

龍應達(Y. D. Lung) ； 蔣大鵬(D. P. Chiang) ； 林水田(S. T. Lin)

《Chinese Journal of Physics》 25卷2期 (1987/06) Pp. 361-371

並列摘要

The magnetic properties, crystallization and embrittlement kinetics of amorphous Fe80B13C7 and Fe80B13Si7 have been studied. Amorphous Fe80B13Si7 has been found to have higher Curie temperture, cyrstallization temperature, selection density at Fe^57 nuclei, and mean magnetic hyperfine field at 0 K than the Fe80B13C7. The temperature dependence of the reduced hyperfine field Δh for these two alloys (measured between 12 and 300K) follows Bloch T^(3/2) law i.e. Δh=[H(T)-R(0)]/H(0)=B3/2(T/Tc)^(3/2)=BT^(3/2). The magnitudes of B3/2 and B are larger for Fe80B13C7. Substitution of C by Si increases the activation energy for crystallization, but decreases the activation energy for embrittlement. This indicates that crystallization and embrittlement are not directly correlated.