Resin bonded permanent magnet composition
AssigneeKabushiki Kaisha Suwa Seikosha
InventorKazutomo Kasai
Life of this patent
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Abstract
An improved magnetic material for a permanent magnet including at least 90 volume percent of a single phase of a samarium-transition metal alloy in a 2-17 molar ratio is provided. The alloy may be represented by the formula Sm.sub.2 (Co Cu Fe M).sub.17 wherein M is at least one element selected from the group of manganese, silcon, titanium, niobium, zirconium, hafnium, tantalum, chromium, vanadium, molybdenum and aluminum.
Claims9
A resin-bonded permanent magnet composition comprising a permanent magnet composition of a single phase rare-earth R.sub.2 (Co Cu Fe M).sub.17 alloy, wherein:
- the rare earth element is present in the alloy in an amount about equal to or greater than 22.0 and less than 24.0 weight percent;
- copper is present in the alloy in an amount about equal to or greater than 2.5 and equal to or less than 13.0 weight percent, iron is present in an amount at least 15.0 and less than or equal to 39.0 weight percent;
- M is at least one element selected from the group consisting of manganese, silcon, titanium, niobium, zirconium, hafnium, tantalum, chromium, vanadium, molybdemium and aluminum and is present in the alloy in an amount about equal to or greater than 0.3 and less than or equal to 4.0 weight percent;
- the balance of the alloy being cobalt and including at least about 10 volume percent of a combining agent admixed with said composition, based on the total volume of the composition and combining agent.
A resin-bonded permanent magnet ingot comprising a permanent magnet composition of a single phase Sm.sub.2 (Co Cu Fe M).sub.17 alloy, wherein the samarium is present in the alloy in an amount about equal to or greater than 22.0 and less than 24.0 weight percent;
- copper is present in the alloy in an amount about equal to or greater than 2.5% and equal to or less than 13.0 weight percent;
- iron is present in an amount greater than 18.0 and less than or equal to 39.0 weight percent;
- and M is at least one element selected from the group consisting of manganese, silicon, titanium, niobium, zirconium, hafnium, tantalum, chromium, vanadium, molybdemium and aluminum and is present in the alloy in an amount about equal to or greater than 0.3 and less than or equal to 4.0 weight percent, the balance of the alloy being cobalt, said permanent magnet composition compressed with at least 10% by volume of a combining agent, based on the volume of the composition and combining agent.
Dependencies are inferred from the claim text.