Magnetic material, permanent magnet, rotary electric machine, and vehicle
AssigneeKabushiki Kaisha Toshiba
InventorsMasaya Hagiwara, Shinya Sakurada, Keiko Okamoto
Life of this patent
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Abstract
A magnetic material is expressed by a composition formula 1: (R1-xYx)aMbTcZnd. R is at least one element selected from the group consisting of rare-earth elements, M is Fe or Fe and Co, T is at least one element selected from the group consisting of Ti, V, Nb, Ta, Mo, and W, x is a number satisfying 0.01≤x≤0.8, a is a number satisfying 4≤a≤20 atomic percent, b is a number satisfying b=100−a−c−d atomic percent, c is a number satisfying 0<c<7 atomic percent, and d is a number satisfying 0.01≤d≤7 atomic percent. The magnetic material includes: a main phase having a ThMn12 crystal phase; and a sub phase containing 50 atomic percent or more of Zn.
Claims23
A magnetic material expressed by
- a composition formula 1:
- (R1-xYx)aMbTcZnd
- where R is at least one element selected from the group consisting of rare-earth elements, M is Fe or Fe and Co, T is at least one element selected from the group consisting of Ti, V, Nb, Ta, Mo, and W, x is a number satisfying 0.01≤x≤0.8, a is a number satisfying 4≤a≤20 atomic percent, b is a number satisfying b=100−a−c−d atomic percent, c is a number satisfying 0<c<7 atomic percent, and d is a number satisfying 0.01≤d≤7 atomic percent,
- the magnetic material comprising:
- a main phase having a ThMn12 crystal phase;
- and
- a sub phase containing 50 atomic percent or more of Zn.
A magnetic material expressed by
- a composition formula 2:
- (R1-xYx)aMbTcXd
- where R is at least one element selected from the group consisting of rare-earth elements, M is Fe or Fe and Co, T is at least one element selected from the group consisting of Ti, V, Nb, Ta, Mo, and W, X is at least one element selected from the group consisting of Zn, Cu, Sn, In, and Ga, x is a number satisfying 0.01≤x≤0.8, a is a number satisfying 4≤a≤20 atomic percent, b is a number satisfying b=100−a−c−d atomic percent, c is a number satisfying 0<c<7 atomic percent, and d is a number satisfying 0.01≤d≤7 atomic percent,
- the magnetic material comprising:
- a main phase having a ThMn12 crystal phase;
- and
- a sub phase containing the element X, wherein
- an average value of the number of depressions and projections at an interface between the main phase and the sub phase is 500 or less.
Dependencies are inferred from the claim text.