Denso Corporation

Sho Goto

Hiroaki Kura

Yasushi Hayashi

Eiji Watanabe

Hidehiko Hiramatsu

Yuta Saiga

Ryota Shinozaki

An FeNi ordered alloy contained in a magnetic material has an L1ordered structure, is doped with an light element, and is provided as a granular particle. A method for manufacturing a magnetic material including an FeNi ordered alloy having an L1ordered structure includes preparing an FeNi ordered alloy provided as a granular particle, and doping a light element into the FeNi ordered alloy.

Magnetic material comprising Fe&#x2014;Ni ordered alloy and method for manufacturing the same

An FeNi ordered alloy has an L1ordered structure, a mean order degree of 0.4 or more throughout a material, and a coercivity of 87.5 kA/m or more. For example, a nitriding treatment of an FeNi random alloy is performed and then a nitriding treatment is performed to obtain an L1-FeNi ordered alloy. A volume mean particle size of a FeNi random alloy is, for example, 45 nm or more, and a treatment temperature of the nitriding treatment is, for example, greater than or equal to 300 degrees Celsius and is less than or equal to 500 degrees Celsius, and a treatment period is, for example, 10 hours or longer.

FeNi ordered alloy, FeNi ordered alloy magnet, and method for manufacturing FeNi ordered alloy

A magnetic material includes an FeNi ordered alloy. The FeNi ordered alloy has L1ordered structure and is provided as an acicular particle having a longer axis and a shorter axis. A method for manufacturing a magnetic material including an FeNi ordered alloy includes preparing an FeNi disordered alloy provided as an acicular particle, and performing a nitriding treatment of nitriding the FeNi disordered alloy. The magnetic material manufacturing method further includes obtaining an L1-type FeNi ordered alloy provided as the acicular particle, by performing a denitrification treatment of removing nitrogen from the FeNi disordered alloy on which the nitriding treatment has been performed.

Magnetic material comprising FeNi ordered alloy and manufacturing method for the same

A method for manufacturing FeNi ordered alloy having a L1type order structure is provided. After a nitrification process for nitriding a powder sample of a FeNi disordered alloy arranged in a tube furnace is performed using a NHgas, a de-nitrification process for removing a nitrogen from the FeNi disordered alloy which is processed by the nitrification process is performed using a Hgas. Thus, the L1type FeNi ordered alloy with a regularity defined by S equal to or higher than 0.5 is obtained.

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Kariya, Japan

Sho Goto