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对纳米晶Fe_(73.5)Cu_1Mo_3Si_(13.5)B_9合金的原始制备态和各退火态样品进行了室温Mossbauer谱研究,结果表明晶化态的合金存在α-Fe(Si)微晶相和晶界的非晶相。晶相和非晶相内场和面积随退火温度的变化是退火时Cu,Mo,B等成分的扩散和在各相中的再分配引起的。最佳磁性能对应非晶相中的铁量占合金铁总量的30％左右,超微晶合金的双相无规各向异性模型表明,一定量的非晶相对保持纳米晶优异的软磁性能是必要的。Fe_2B相的出现使合金的性能变坏。
The Mossbauer spectra of the as-prepared and as-annealed samples of Fe_ (73.5) Cu_1Mo_3Si_ (13.5) B_9 nanocomposites were investigated. The results show that the α-Fe (Si) Amorphous phase. The changes of the inner field and the area of the crystalline and amorphous phases with the annealing temperature are caused by the diffusion of Cu, Mo, B and the like and the redistribution in each phase during annealing. The best magnetic properties correspond to about 30% of the total amount of iron in the amorphous phase. The bipolar random anisotropy model of the nanocrystalline alloy shows that a certain amount of amorphous phase keeps the excellent soft magnetic property Can be necessary. The appearance of Fe 2 B phase deteriorates the properties of the alloy.