FeCuNbCrSiB非晶合金的晶化及磁导率与温度的关系

Crystallization and temperture dependencd of permeability for FeCuNbCrSiB amorphous alloy

对Fe6 8Cu1 Nb3Cr8Si1 0 B1 0 非晶合金在 40 0～ 5 40℃等温退火 1h后的晶化行为及初始磁导率 μi 与温度的关系进行了研究。结果表明 :用Cr取代部分Fe和Si的Fe6 8Cu1 Nb3Cr8Si1 0 B1 0 非晶合金经适当温度退火后可获得具有bcc结构的α Fe(Si)纳米晶 ,合金的居里温度 (Tc <15 0℃ )远低于Finemet合金的Tc(约为 3 40℃ ) ;合金在淬态和 40 0℃退火后的 μi T曲线上出现Hop kinson峰 ,经 5 0 0℃和 5 40℃退火后其 μi T曲线上Hopkinson峰消失 ,曲线具有明显的长尾特征。

Crystallization behavior and temperature dependence of permeability for Fe 68 Cu 1Nb 3Cr 8Si 10 B 10 amorphous alloy have been investigated. The results show that a bcc α Fe(Si) phase with grain size about 14nm was precipitated in the amorphous matrix for the Fe 68 Cu 1Nb 3Cr 8Si 10 B 10 alloy annealed at suitable temperatures, and the Curie temperature of this alloy was mach lower ( T c<150℃)than that of the Finemet alloy. Hopkinson peaks were observed in the μ i T curves of the as quenched Fe 68 Cu 1Nb 3Cr 8Si 10 B 10 alloy as well as in the alloy annealed at 400℃, but there were no Hopkinson peak in μ i T curves for the alloy annealed at 500℃ and 540℃ in which the μ i always decreased with increasing temperature.