Long Hou , Wenjun Liu , Mengen Shi , Benjun Wang , Quanhe Bao , Cong Liu , Hanchen Feng , Qizhong Shang , Weihuo Li , Zhineng Xie
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引用次数: 0
摘要
实现高性能纳米晶合金的工业化生产是一个活跃的研究课题，其中氧化是一个不可避免的和需要解决的首要问题。在本研究中，我们对双相FeNiBCu纳米晶合金的氧化和结晶行为进行了全面的研究，以及氧化和磁性能之间关系的机制。化学价态和微观结构分析表明，铁在纳米晶体中的浓度和活性高于在基体中的浓度和活性，从而为铁氧化物提供了有效的成核位点。独特的分层形态和内部结构明显调节磁化-磁软性（Bs-Hc）权衡。因此，合金在结晶和氧化过程中同时进行，获得了1.70 T的高Bs和3.5 a /m的低Hc。这些结果增强了我们对氧化对磁性能影响的认识，并为高性能纳米晶合金的工业热处理提供了理论参考。
Unveiling the correlation between oxidation and magnetic properties in dual-phase FeNiBCu nanocrystalline alloys
Achieving the industrial production of high-performance nanocrystalline alloys is an active research topic in which oxidation is an inescapable and top-priority issue that needs to be addressed. In this study, we conducted a comprehensive investigation into the oxidation and crystallization behaviors of dual-phase FeNiBCu nanocrystalline alloys, as well as the mechanisms underlying the relationship between oxidation and magnetic properties. The chemical valence states and microstructures analysis, indicative of galvanic cell structures, demonstrated that the concentration and activity of Fe in nanocrystals were higher than those in the matrix, thus providing effective nucleation sites for Fe-oxides. Unique delamination morphology and inner structure distinctly regulated the magnetization-magnetic softness (Bs-Hc) tradeoff. Consequently, the alloy underwent simultaneous crystallization and oxidation, affording a high Bs of 1.70 T and a low Hc of 3.5 A/m. These results enhance our understanding of the effect of oxidation on magnetic properties and provide a theoretical reference for the industrial heat treatment of high-performance nanocrystalline alloys.
期刊介绍：
The Journal of Materials Research and Technology is a publication of ABM - Brazilian Metallurgical, Materials and Mining Association - and publishes four issues per year also with a free version online (www.jmrt.com.br). The journal provides an international medium for the publication of theoretical and experimental studies related to Metallurgy, Materials and Minerals research and technology. Appropriate submissions to the Journal of Materials Research and Technology should include scientific and/or engineering factors which affect processes and products in the Metallurgy, Materials and Mining areas.
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