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首页> 外文期刊>IEEE Transactions on Magnetics >Effects of Silicon Content on the Properties of Gas-Atomized Fe–Si–Cr Powders
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Effects of Silicon Content on the Properties of Gas-Atomized Fe–Si–Cr Powders

机译：硅含量对气雾化Fe–Si–Cr粉末性能的影响

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摘要

Fe-7%, 8%, 9%, and 11%Si-Cr powders were gas atomized and then annealed at 25 °C-750 °C to investigate the effects of Si content, DO3 phase, and B2 phase on the high-frequency permeability of the powders. The formation of the B2 phase could not be suppressed during the atomization process of all the powders. The evolution temperatures of the DO3 phase in the Fe-7%, 8%, and 9%Si-Cr powders as measured by X-ray diffractometer were 550 °C, 550 °C, and 450 °C, respectively. As the annealing temperature was increased, the DO3 phase grew rapidly, and the lattice parameters of the powders were decreased except for those of the Fe-11%Si-Cr powder. The coercivity of all powders decreased with increasing temperature; however, the coercivity of the Fe-8%, 9%Si-Cr powders increased sharply after annealing at 450 °C. Permeability decreased rapidly with increasing temperature except for the Fe-11%Si-Cr powder; thus, the highest real permeability was obtained for the as-atomized Fe-8%Si-Cr powder. The changes in the coercivity and permeability of the powders with annealing temperature could be attributed to the evolution of the DO3 phase, Si segregation, and changes in electrical resistivity.
机译：将Fe-7％，8％，9％和11％的Si-Cr粉末气雾化，然后在25°C-750°C退火，以研究Si含量，DO 3 相的影响，和B2相对粉末的高频渗透性。在所有粉末的雾化过程中，无法抑制B2相的形成。 X射线衍射仪测得的Fe-7％，8％和9％Si-Cr粉末中DO 3 相的析出温度为550°C，550°C和450分别为℃。随着退火温度的升高，DO 3 相迅速增长，除Fe-11％Si-Cr粉末外，其晶格参数均降低。所有粉末的矫顽力均随温度的升高而降低。然而，Fe-8％，9％Si-Cr粉末在450°C退火后的矫顽力急剧增加。除Fe-11％Si-Cr粉末外，渗透率随温度的升高而迅速降低。因此，雾化后的Fe-8％Si-Cr粉末获得了最高的真实磁导率。粉末的矫顽力和磁导率随退火温度的变化可能归因于DO 3 相的演化，Si的偏析和电阻率的变化。

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