Jfe Steel Corporation

Tokin Corporation

Miho Chiba

Akiri Urata

Takuya Takashita

Makoto Nakaseko

Naoki Yamamoto

Akio Kobayashi

Mineo Muraki

Provided is an Fe-based nanocrystalline alloy powder. The Fe-based nanocrystalline alloy powder has a chemical composition, excluding inevitable impurities, represented by a composition formula of FeSiBPCuM, where the M in the composition formula is at least one element selected from the group consisting of Nb, Mo, Zr, Ta, W, Hf, Ti, V, Cr, Mn, C, Al, S, O, and N, 79 at %≤a≤84.5 at %, 0 at %≤b<6 at %, 0 at %<c≤10 at %, 4 at %<d≤11 at %, 0.2 at %≤e≤0.53 at %, 0 at %≤f≤4 at %, a+b+c+d+e+f=100 at %, a degree of crystallinity is more than 10% by volume, and an Fe crystallite diameter of the Fe-based nanocrystalline alloy powder is 50 nm or less.

Fe-based nanocrystalline alloy powder, magnetic component, and dust core

This method for manufacturing a powder core is provided with: a step for heat-treating amorphous soft magnetic alloy powder to obtain nanocrystal powder; a step for obtaining granulated powder from nanocrystal powder, malleable powder, and a binder; a step for pressure-molding the granulated powder to obtain a green compact; a step for curing the binder by heat-treating the green compact at a temperature which is equal to or higher than the curing initiation temperature of the binder and lower than the crystallization initiation temperature of the amorphous soft magnetic alloy powder.

Method for manufacturing a powder core, the powder core and an inductor

This soft magnetic powder is represented by composition formula FeSiBPCuwith the exception of unavoidable impurities. In the composition formula, a, b, c, d and e satisfy 79&#x2264;a&#x2264;84.5 at %, 0&#x2264;b&#x3c;6 at %, 4&#x2264;c&#x2264;10 at %, 4&#x3c;d&#x2264;11 at %, 0.2&#x2264;e&#x3c;0.4 at %, and a+b+c+d+e=100 at %.

Soft magnetic powder, Fe-based nanocrystalline alloy powder, magnetic component and dust core

Provided is a soft magnetic powder that can produce a dust core having excellent magnetic properties. The soft magnetic powder has a chemical composition, excluding inevitable impurities, represented by a composition formula of FeSiBPCuM, where the M is at least one element selected from the group consisting of Nb, Mo, Zr, Ta, W, Hf, Ti, V, Cr, Mn, C, Al, S, O, and N, 79 at %&#x2264;a&#x2264;84.5 at %, 0 at %&#x2264;b&#x3c;6 at %, 0 at %&#x3c;c&#x2264;10 at %, 4 at %&#x3c;d&#x2264;11 at %, 0.2 at %&#x2264;e&#x2264;0.53 at %, 0 at %&#x2264;f&#x2264;4 at %, a+b+c+d+e+f=100 at %, a particle size is 1 mm or less, and a median of circularity of particles constituting the soft magnetic powder is 0.4 or more and 1.0 or less.

Soft magnetic powder, Fe-based nanocrystalline alloy powder, magnetic component, and dust core

A soft magnetic powder is represented by FeSiBPCrMexcept for inevitable impurities, wherein: M is one or more element selected from V, Mn, Co, Ni, Cu and Zn; 0 atomic %&#x2264;b&#x2264;6 atomic %; 4 atomic %&#x2264;c&#x2264;10 atomic %; 5 atomic %&#x2264;d&#x2264;12 atomic %; 0 atomic %&#x3c;e; 0.4 atomic %&#x2264;f&#x3c;6 atomic %; and a+b+c+d+e+f=100 atomic %.

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Sendai, Japan

Miho Chiba