Hitachi Metals, Ltd.

Proterial, Ltd.

Metglas, Inc.

Nakao Moritsugu

Hiroki Yamamoto

Daichi Azuma

Jun Sunakawa

Hiroshi Takashima

Katsuhiro Ogura

Masahito Yoshii

Akio Uchikawa

Daisuke Kishi

A new method for evaluating embrittlement of an amorphous alloy ribbon is provided. The method includes: pressing a pressurization member from one side to a plurality of positions of an amorphous alloy ribbon; scattering, in the amorphous alloy ribbon, pressurization portions where the pressurization member is pressed to form indentation; and evaluating embrittlement by the number or distribution of pressurization portions where cracks have occurred.

Method for evaluating embrittlement of amorphous alloy ribbon and test device for evaluating embrittlement of amorphous alloy ribbon

A method for producing an Fe-based nanocrystalline alloy ribbon, the method including a step of supplying a molten Fe-based alloy onto a rotating chill roll, and rapidly solidifying the molten Fe-based alloy that has been supplied onto the chill roll, thereby obtaining an Fe-based amorphous alloy ribbon having a free solidified surface and a roll contact surface, and a step of heat-treating the Fe-based amorphous alloy ribbon, thereby obtaining an Fe-based nanocrystalline alloy ribbon; wherein an outer peripheral part of the chill roll is composed of a Cu alloy, and a thermal conductivity of the outer peripheral part is from 70 W/(m·K) to 225 W/(m·K).

Method for producing Fe-based nanocrystalline alloy ribbon, method for producing magnetic core, Fe-based nanocrystalline alloy ribbon, and magnetic core

A magnetic piece, a multilayer magnetic piece and a multilayer core with an adhesive agent of excellent saturation magnetic flux density are provided. The magnetic piece includes a soft magnetic amorphous alloy ribbonand a resin layerprovided on at least one surface of the soft magnetic amorphous alloy ribbon. The resin layer contains a resin whose Shore D hardness is not more than 60. The resin may have a Shore D hardness of not more than 25 or may have a Shore D hardness of not less than 1.

Magnetic material, laminated magnetic material, laminated packet, and laminated core using magnetic material, and magnetic material producing method

This core for a high-frequency acceleration cavity has shape formed with the single roll process by winding, with an interposed insulating layer, a Fe-based nanocrystal alloy thin strip having a roll contact surface and a free surface. The core for a high-frequency acceleration cavity is characterized in that projections having a crater-form depression are dispersed on the free surface of the Fe-based nanocrystal alloy thin strip, and the apexes of the projections are ground and blunted.

Core for high-frequency acceleration cavity, and manufacturing method thereof

Growing community of inventors

Tokyo, Japan

Nakao Moritsugu