In one embodiment, a permanent magnet has a composition expressed by a composition formula: RNx(CrpSiqM1-p-q)z (R is at least one element selected from Y and rare-earth elements, M is at least one element selected from Fe and Co, and x, p, q, and z are atomic ratios satisfying 0.5≦x≦2.0, 0.005≦p≦0.2, 0.005≦q≦0.2, and 4≦z≦13, respectively). The permanent magnet has a density of 6.5 g/cm3 or more and satisfies the relationship of I(110)/{I(110)+I(303)}≦0.05, in which I(303) represents a diffraction peak intensity from a (303) plane of a Th2Zn17 phase obtained through powder X-ray diffraction of the permanent magnet, and I(110) represents a diffraction peak intensity from a (110) plane of an α-Fe phase obtained through the powder X-ray diffraction.
PERMANENT MAGNET, ROTARY ELECTRICAL MACHINE, AND VEHICLE
2017-09-21
Patent
Electronic Resource
English
IPC: | H02K Dynamoelektrische Maschinen , DYNAMO-ELECTRIC MACHINES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / H01F MAGNETS , Magnete |
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