Structure and magnetic properties of Ni5(Fe0.5Co0.5)68.5Si13.5Nb3B9Cu alloy
Structure and magnetic properties of Ni5(Fe0.5Co0.5)68.5Si13.5Nb3B9Cu alloy
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DOI：
10.1016/j.jmmm.2012.06.029
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发表时间：
2012-11
影响因子：
2.7
通讯作者：
Yun-yun Jia;Zhi Wang;Jia Wang;Rui-min Shi
中科院分区：
文献类型：
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作者：
Yun-yun Jia;Zhi Wang;Jia Wang;Rui-min Shi
研究了Ni 5（Fe0.5Co0.5）68.5Si13.5Nb3B9Cu合金淬火态和退火态的结构和磁性能。通过X射线衍射和透射电子显微镜研究了其结构，通过感应法研究了其磁性能，包括初始磁导率（μi）和饱和磁性（Ms）。在510-600°C退火时，观察到由平均晶粒尺寸约13- 14 nm的纳米晶镶嵌在残余非晶基体中的双相纳米晶结构。结果表明，50at%Co替代Ni 5 Fe 68. 5Si 13. 5 Nb 3B 9 Cu合金中的Fe，显著提高了非晶居里温度（Tcam）和晶化区间温度（ΔTx）。此外，取代是明显有效的改善高温磁性能。特别地，即使在600°C下退火，Ni 5（Fe 0.5Co 0.5）68.5Si 13.5Nb 3B 9 Cu合金在高于Tcam的升高的温度下仍然表现出较大的μ i值。采用随机各向异性模型，系统地分析了μ i随温度的演化规律.
Structure and magnetic properties of as-quenched and annealed Ni5(Fe0.5Co0.5)68.5Si13.5Nb3B9Cu samples were investigated. Structure has been studied by x-ray diffraction and transmission electron microscopy, while magnetic properties including initial permeability (μi) and saturation magnetism (Ms) have been performed by induction methods. When annealing at 510–600°C, a dual-phase nanocrystalline structure was observed, which was composed of nanocrystals with average grain size about 13–14nm embedded in the residual amorphous matrix. It was found that the substitution of 50at% Co for Fe in Ni5Fe68.5Si13.5Nb3B9Cu alloy significantly enhanced the Curie temperature of amorphous phase (Tcam) and interval temperature (ΔTx) between the two crystallization temperatures. Moreover, the substitution was clearly efficient for improving the high-temperature magnetic properties. Especially, even annealing at 600°C, the Ni5(Fe0.5Co0.5)68.5Si13.5Nb3B9Cu alloy still exhibited larger μivalue at elevated temperatures above Tcam. The evolution of μiwith temperature was systematically analyzed in terms of random anisotropy model.