Magnet containing low rare earth element and method for manufacturing the same
AssigneeNissan Motor Co., Ltd.
InventorsHideaki Ono, Tetsurou Tayu, Munekatsu Shimada, Makoto Kano
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Abstract
An exchange-spring magnet is prepared using a magnet alloy containing Ta and C in addition to Nd, Fe and B. This exchange-spring magnet uses the magnet alloy prepared by a liquid quenching method or a mechanical alloying method. Further, by subjecting the magnetic alloy having a part set in an amorphous state to heat treatment, an exchange-spring magnet exhibits good properties regarding magnetic flux density and coercive force.
Claims10
A magnet alloy, comprising:
- Neodymium;
- Iron;
- Boron;
- Tantalum;
- and
- Carbon.
An exchange-spring magnet, comprising:
- a magnet alloy including Neodymium, Iron, Boron, Tantalum, and Carbon,
- wherein the exchange-spring magnet contains a α-Fe phase, a Nd2Fe14B phase, and a TaC phase.
A method for manufacturing an exchange-spring magnet, comprising:
- preparing a magnet alloy including Neodymium, Iron, Boron, Tantalum and Carbon;
- making the magnet alloy having at least a part thereof set in an amorphous state by a liquid quenching method or a mechanical alloying method;
- and
- subjecting the magnet alloy containing the amorphous state to heat treatment.
A motor, comprising:
- an exchange-spring magnet,
- the exchange-spring magnet, comprising:
- a magnet alloy including Neodymium, Iron, Boron, Tantalum and Carbon, wherein the exchange-spring magnet contains a α-Fe phase, a Nd2Fe14B phase and a TaC phase.
A sensor, comprising:
- an exchange-spring magnet,
- the exchange-spring magnet, comprising:
- a magnet alloy including Neodymium, Iron, Boron, Tantalum and Carbon,
- wherein the exchange-spring magnet contains a α-Fe phase, a Nd2Fe14B phase, and a TaC phase.
Dependencies are inferred from the claim text.