Effect of Crystallization on the Electrical Resistance and Structure of the Co67Cr7Fe4Si8B14 Amorphous Alloy

The variations in the electrical resistance and structure of amorphous Co₆₇Cr₇Fe₄Si₈B₁₄ during constant-rate heating were studied by four-probe ac measurements and x-ray diffraction. The crystallization process was shown to follow the eutectic mechanism. The phase composition of the crystallization products was determined. Between 870 and 920 K, the alloy is in an amorphous–nanocrystalline state. The resistance of the as-prepared, amorphous alloy shows anomalies at about 497 and 843 K, which are interpreted in terms of structural changes.