Microstructure and Pressure Dependence of Resistivity in Alloy FeCuNbMSiB (M＝Nb, V, Mo) with Nanophase Crystallization

The results on X-ray diffraction and transmission electron microscope indicated that crystallized nanophase was -Fe(Si) solid solution in amorphous FeCuNbMSiB (M=Nb, V, Mo) alloys after annealing at 540 ℃ for 20 min. Graininess of -Fe(Si) was 10～20 nm. Besides, their resistivity under atmospheric pressure and room temperature and variation of resistivity with hydrostatic pressure were measured in detail in the range from 0.000 1 to 2.40 GPa. Linear empirical equations of their relative resistivity to pressure were obtained by fitting on computer. Finally, effect of annealing mode and temperature on forming nanophase crystallization were discussed.