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Magnetic properties of Fe–50%Ni alloy fabricated by metal injection molding
Graphical abstract The figure shows the effect of sintering atmosphere on microstructures of the samples ((a) nitrogen; (b) argon; (c) vacuum; and (d) hydrogen). Since pores can pin down and drag grain boundary movement, the porosities obtained from the four different processes are different. It can be seen that the grain sizes of the sample sintered in the atmosphere of nitrogen, argon and vacuum are smaller than the grain size of sample sintered in hydrogen. It indicates that the impurity such as C, N, O will restrict the grain growth and lead to the sharp decrement of magnetic performance. Display Omitted
Highlights High-performance Fe–50%Ni alloy was produced by metal injection molding. The magnetic properties were closely related to impurities and grain size. The sintering parameters of Fe–50%Ni alloy were optimized.
Abstract Fe–50%Ni soft magnetic alloys are attractive in their applications with both low coercivity and high permeability. Their magnetic properties are closely related to sintering conditions. In this paper, Fe–50%Ni soft magnetic alloys were successfully produced by metal injection molding using carbonyl iron and carbonyl nickel as raw materials. The effects of sintering temperature, sintering atmosphere and time on the magnetic properties of the alloy were investigated. Special attention was paid to the influence that sintering conditions have on chemistry and the resulting effects on magnetic properties. The results indicated that the magnetic permeability was greatly dependent on the content of interstitial atom such as C, O, and N and the density was a major factor affecting the saturation induction. Furthermore, the effects of processing condition on the microstructures of Fe–50%Ni alloy were shown. The optimum magnetic properties for Fe–50%Ni alloy were obtained by maximizing density and sintering temperatures, and minimizing the contamination levels of C, O and N.
Magnetic properties of Fe–50%Ni alloy fabricated by metal injection molding
Graphical abstract The figure shows the effect of sintering atmosphere on microstructures of the samples ((a) nitrogen; (b) argon; (c) vacuum; and (d) hydrogen). Since pores can pin down and drag grain boundary movement, the porosities obtained from the four different processes are different. It can be seen that the grain sizes of the sample sintered in the atmosphere of nitrogen, argon and vacuum are smaller than the grain size of sample sintered in hydrogen. It indicates that the impurity such as C, N, O will restrict the grain growth and lead to the sharp decrement of magnetic performance. Display Omitted
Highlights High-performance Fe–50%Ni alloy was produced by metal injection molding. The magnetic properties were closely related to impurities and grain size. The sintering parameters of Fe–50%Ni alloy were optimized.
Abstract Fe–50%Ni soft magnetic alloys are attractive in their applications with both low coercivity and high permeability. Their magnetic properties are closely related to sintering conditions. In this paper, Fe–50%Ni soft magnetic alloys were successfully produced by metal injection molding using carbonyl iron and carbonyl nickel as raw materials. The effects of sintering temperature, sintering atmosphere and time on the magnetic properties of the alloy were investigated. Special attention was paid to the influence that sintering conditions have on chemistry and the resulting effects on magnetic properties. The results indicated that the magnetic permeability was greatly dependent on the content of interstitial atom such as C, O, and N and the density was a major factor affecting the saturation induction. Furthermore, the effects of processing condition on the microstructures of Fe–50%Ni alloy were shown. The optimum magnetic properties for Fe–50%Ni alloy were obtained by maximizing density and sintering temperatures, and minimizing the contamination levels of C, O and N.
Magnetic properties of Fe–50%Ni alloy fabricated by metal injection molding
Ma, Jidong (author) / Qin, Mingli (author) / Zhang, Lin (author) / Zhang, Ruijie (author) / Tian, Lusha (author) / Zhang, Xiaofeng (author) / Li, Xingquan (author) / Qu, Xuanhui (author) / Khan, Dil Faraz (author)
2013-05-07
5 pages
Article (Journal)
Electronic Resource
English
Magnetic properties of Fe-50%Ni alloy fabricated by metal injection molding
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