Mitsubishi Materials Corporation

Jemco Inc.

Yasushi Nayuki

Ryoji Nakayama

Gakuji Uozumi

Kazunori Igarashi

A flat soft magnetic metal powder is provided that includes: Ni in the range of 60 to 90 mass %, one or more kinds of Nb, V, and Ta in the range of 0.05 to 20 mass % in total (0.05 to 19.95 mass % when Mo is added thereto), Mo in the range of 0.05 to 10 mass % if necessary, one or two kinds of Al and Mn in the range of 0.01 to 1 mass % in total if necessary, and the balance including Fe; an average grain size of 30 to 150 &#x3bc;m and an aspect ratio (average grain size/average thickness) of 5 to 500; and a flat face. Here, with a peak intensity of a face index () in an X-ray diffraction pattern Iand a peak intensity of a face index () I, a peak intensity ratio I/Iis in the range of 0.1 to 10.

Flat soft magnetic metal powder and composite magnetic material including the soft magnetic metal powder

The invention provides an Fe&#x2014;Ni&#x2014;Mo soft magnetic flaky powder having a component composition of, in percent by mass, Ni: 60 to 90%, Mo: 0.05 to 1.95%, and the balance of Fe and unavoidable impurities, and a flat surface of an average particle size of 30 to 150 &#x3bc;m, and an aspect ratio (average particle size /average thickness) of 5 to 500; and having a peak intensity ratio I/Iwithin a range between 0.43 and 10, where Iis the peak height of the face index (200) and Iis the peak height of the face index (111), in an X-ray diffraction pattern measured in such a manner that the plane including the X-ray incident direction and the diffraction direction is perpendicular to the flat surface of the soft magnetic flaky powder, and the angle between the incident direction and the flat surface is equal to the angle between the diffraction direction and the flat surface. Furthermore, the invention provides a soft magnetic flaky powder with oxide layer wherein an oxide layer of a thickness of 50 to 1000 &#x212b; is formed on the surface of this soft magnetic flaky powder.

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Choshi, Japan

Yasushi Nayuki