# US 10,312,004 B2 · Metal powder core comprising copper powder, coil component, and fabrication method for metal powder core > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,312,004 B2 - Document ID: US10312004B2 - Status: Granted - Kind: B2 - Application number: 15/616,310 - Filed: 2017-06-07 - Published: 2017-09-21 - Granted: 2019-06-04 - Earliest claimed: 2012-01-18 - Assignees: Hitachi Metals, Ltd. - Applicants: Hitachi Metals, Ltd. - Inventors: Tetsuro Kato; Shin Noguchi; Kazunori Nishimura - Web page: https://patentgrep.com/patent/US10312004B2 ## CPC - B22F 1/08: Metallic powder characterised by particles having an amorphous microstructure - B22F 1/10: Metallic powder containing lubricating or binding agents; Metallic powder containing organic material - B22F 1/16: Metallic particles coated with a non-metal (coated with lubricating or binding agents or with organic material B22F1/10) - B22F 3/02: Compacting only - B22F 9/002: {amorphous or microcrystalline} - B22F 9/04: starting from solid material, e.g. by crushing, grinding or milling ({C22C1/1084 takes precedence}; crushing, grinding or milling, in general, see the relevant subclasses, e.g. B02C) - C22C 33/02: by powder metallurgy - C22C 33/0278: {with at least one alloying element having a minimum content above 5%} - C22C 45/02: with iron as the major constituent - H01F 1/15308: {based on Fe/Ni (H01F1/15325 takes precedence)} - H01F 1/15333: {containing nanocrystallites, e.g. obtained by annealing} - H01F 1/1535: {by powder metallurgy, e.g. spark erosion} - H01F 1/22: pressed, sintered, or bound together - H01F 1/24: the particles being insulated - H01F 1/28: dispersed or suspended in a bonding agent - H01F 1/33: mixtures of metallic and non-metallic particles; metallic particles having oxide skin - H01F 3/08: made from powder (powder coatings on sheets H01F3/02; on strips or ribbons H01F3/04; on wires H01F3/06) - H01F 27/255: made from particles (H01F27/26 takes precedence) - H01F 27/28: Coils; Windings; Conductive connections - H01F 41/0246: {Manufacturing of magnetic circuits by moulding or by pressing powder (magnetic cores made by moulding or by pressing powder H01F27/255; soft magnetic particles H01F1/20, H01F1/36)} - B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER - C22C: ALLOYS (treatment of alloys C21D, C22F) - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES ## Abstract In a metal powder core constructed from soft magnetic material powder and a coil component employing this, a configuration suitable for reduction of a core loss is provided. The metal powder core constructed from soft magnetic material powder is characterized in that Cu is dispersed among the soft magnetic material powder. It is characterized in that, preferably, the soft magnetic material powder is pulverized powder of soft magnetic alloy ribbon and that Cu is dispersed among the pulverized powder of soft magnetic alloy ribbon. Further, it is characterized in that, preferably, the soft magnetic alloy ribbon is a Fe-based nano crystal alloy ribbon or a Fe-based alloy ribbon showing a Fe-based nano crystalline structure and that the pulverized powder has a nano crystalline structure. ## Claims ### Claim 1 A fabrication method for metal powder core constructed from soft magnetic material powder, wherein the soft magnetic material powder is pulverized powder of soft magnetic alloy ribbon, wherein the method includes: a first step of mixing pulverized powder of soft magnetic alloy ribbon, Cu powder, and binder with each other such that the content of the Cu powder is 0.1% to 10% relative to a total mass of the pulverized powder and the Cu powder; a second step of performing pressing of mixed powder obtained at the first step; and a step of processing by heat treatment a compact in which the Cu powder plastically deformed by the second step of performing pressing is dispersed among the pulverized powder of soft magnetic alloy ribbon so as to obtain a metal powder core in which the powder is bound together by the binder. ### Claim 2 (depends on 1) The fabrication method for metal powder core according to claim 1, wherein at the first step, the pulverized powder of soft magnetic alloy ribbon and the Cu powder are first mixed with each other and, after that, binder is added and then mixing is performed further. ### Claim 3 (depends on 1) The fabrication method for metal powder core according to claim 1, wherein the Cu powder is granular. ### Claim 4 (depends on 1) The fabrication method for metal powder core according to claim 1, wherein a silicon oxide film is provided on a surface of a particle of the pulverized powder of soft magnetic alloy ribbon to be provided prior to the first step. ### Claim 5 (depends on 1) The fabrication method for metal powder core according to claim 1, wherein the soft magnetic alloy ribbon is a Fe-based amorphous alloy ribbon. ### Claim 6 (depends on 5) The fabrication method for metal powder core according to claim 5, wherein the content of the Cu powder is 0.1% to 7% relative to a total mass of the pulverized powder of soft magnetic alloy ribbon and the Cu powder. ### Claim 7 (depends on 1) The fabrication method for metal powder core according to claim 1, wherein the soft magnetic alloy ribbon is a Fe-based nano crystal alloy ribbon or a Fe-based alloy ribbon showing a Fe-based nano crystalline structure. ### Claim 8 (depends on 7) The fabrication method for metal powder core according to claim 7, wherein crystallization treatment causing showing of a Fe-based nano crystalline structure is performed after the second step.