JPH0644525B
PURPOSE:To form a corrosion-proof thin film, having excellent adhesive property and corrosion-proof property, on the surface of a permanent magnet material in uniform thickness by a method wherein a corrosion-proof thin film layer is formed on the surface of a permanent magnet body, having the main...
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| creator | HAYAKAWA TETSUHARU HAMADA SHIGEKI |
| description | PURPOSE:To form a corrosion-proof thin film, having excellent adhesive property and corrosion-proof property, on the surface of a permanent magnet material in uniform thickness by a method wherein a corrosion-proof thin film layer is formed on the surface of a permanent magnet body, having the main phase consisting of tetragonal crystal, by an ion vapor-deposition thin film forming method. CONSTITUTION:The fine powder, in the composition of Nd 15, Dy 1.5, B 8 and Fe 75.5atom%, is placed in a metal mold, the fine powder is oriented in a magnetic field, and a molded body is formed by molding. The molded body is heat-treated, and a permanent magnet is manufactured. A test piece is cut out from the permanent magnet obtained, the Ti thin piece of coating material is evaporated by arc discharge under vacuum in a vacuum container containing the test piece, N2 gas is formed into accelarated N2 gas ions, Ti vapor and N2 gas ions are made to irradiate, and a Ti thin film is formed on the surface of the test piece. As a result, a corrosion-proof thin film layer, having the prescribed thickness and excellent uniformity, can be obtained, and the oxidization of the permanent magnet can completely be prevented. |
| format | Patent |
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CONSTITUTION:The fine powder, in the composition of Nd 15, Dy 1.5, B 8 and Fe 75.5atom%, is placed in a metal mold, the fine powder is oriented in a magnetic field, and a molded body is formed by molding. The molded body is heat-treated, and a permanent magnet is manufactured. A test piece is cut out from the permanent magnet obtained, the Ti thin piece of coating material is evaporated by arc discharge under vacuum in a vacuum container containing the test piece, N2 gas is formed into accelarated N2 gas ions, Ti vapor and N2 gas ions are made to irradiate, and a Ti thin film is formed on the surface of the test piece. As a result, a corrosion-proof thin film layer, having the prescribed thickness and excellent uniformity, can be obtained, and the oxidization of the permanent magnet can completely be prevented.</description><edition>5</edition><language>eng</language><subject>ALLOYS ; BASIC ELECTRIC ELEMENTS ; CHEMISTRY ; ELECTRICITY ; FERROUS OR NON-FERROUS ALLOYS ; INDUCTANCES ; MAGNETS ; METALLURGY ; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES ; TRANSFORMERS ; TREATMENT OF ALLOYS OR NON-FERROUS METALS</subject><creationdate>1994</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19940608&DB=EPODOC&CC=JP&NR=H0644525B2$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19940608&DB=EPODOC&CC=JP&NR=H0644525B2$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>HAYAKAWA TETSUHARU</creatorcontrib><creatorcontrib>HAMADA SHIGEKI</creatorcontrib><title>JPH0644525B</title><description>PURPOSE:To form a corrosion-proof thin film, having excellent adhesive property and corrosion-proof property, on the surface of a permanent magnet material in uniform thickness by a method wherein a corrosion-proof thin film layer is formed on the surface of a permanent magnet body, having the main phase consisting of tetragonal crystal, by an ion vapor-deposition thin film forming method. CONSTITUTION:The fine powder, in the composition of Nd 15, Dy 1.5, B 8 and Fe 75.5atom%, is placed in a metal mold, the fine powder is oriented in a magnetic field, and a molded body is formed by molding. The molded body is heat-treated, and a permanent magnet is manufactured. A test piece is cut out from the permanent magnet obtained, the Ti thin piece of coating material is evaporated by arc discharge under vacuum in a vacuum container containing the test piece, N2 gas is formed into accelarated N2 gas ions, Ti vapor and N2 gas ions are made to irradiate, and a Ti thin film is formed on the surface of the test piece. As a result, a corrosion-proof thin film layer, having the prescribed thickness and excellent uniformity, can be obtained, and the oxidization of the permanent magnet can completely be prevented.</description><subject>ALLOYS</subject><subject>BASIC ELECTRIC ELEMENTS</subject><subject>CHEMISTRY</subject><subject>ELECTRICITY</subject><subject>FERROUS OR NON-FERROUS ALLOYS</subject><subject>INDUCTANCES</subject><subject>MAGNETS</subject><subject>METALLURGY</subject><subject>SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES</subject><subject>TRANSFORMERS</subject><subject>TREATMENT OF ALLOYS OR NON-FERROUS METALS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1994</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZOD2CvAwMDMxMTUydeJhYE1LzClO5YXS3AxKbq4hzh66qQX58anFBYnJqXmpJfFIOpyMjIlSBAB7NBxC</recordid><startdate>19940608</startdate><enddate>19940608</enddate><creator>HAYAKAWA TETSUHARU</creator><creator>HAMADA SHIGEKI</creator><scope>EVB</scope></search><sort><creationdate>19940608</creationdate><title>JPH0644525B</title><author>HAYAKAWA TETSUHARU ; HAMADA SHIGEKI</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JPH0644525BB23</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1994</creationdate><topic>ALLOYS</topic><topic>BASIC ELECTRIC ELEMENTS</topic><topic>CHEMISTRY</topic><topic>ELECTRICITY</topic><topic>FERROUS OR NON-FERROUS ALLOYS</topic><topic>INDUCTANCES</topic><topic>MAGNETS</topic><topic>METALLURGY</topic><topic>SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES</topic><topic>TRANSFORMERS</topic><topic>TREATMENT OF ALLOYS OR NON-FERROUS METALS</topic><toplevel>online_resources</toplevel><creatorcontrib>HAYAKAWA TETSUHARU</creatorcontrib><creatorcontrib>HAMADA SHIGEKI</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>HAYAKAWA TETSUHARU</au><au>HAMADA SHIGEKI</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>JPH0644525B</title><date>1994-06-08</date><risdate>1994</risdate><abstract>PURPOSE:To form a corrosion-proof thin film, having excellent adhesive property and corrosion-proof property, on the surface of a permanent magnet material in uniform thickness by a method wherein a corrosion-proof thin film layer is formed on the surface of a permanent magnet body, having the main phase consisting of tetragonal crystal, by an ion vapor-deposition thin film forming method. CONSTITUTION:The fine powder, in the composition of Nd 15, Dy 1.5, B 8 and Fe 75.5atom%, is placed in a metal mold, the fine powder is oriented in a magnetic field, and a molded body is formed by molding. The molded body is heat-treated, and a permanent magnet is manufactured. A test piece is cut out from the permanent magnet obtained, the Ti thin piece of coating material is evaporated by arc discharge under vacuum in a vacuum container containing the test piece, N2 gas is formed into accelarated N2 gas ions, Ti vapor and N2 gas ions are made to irradiate, and a Ti thin film is formed on the surface of the test piece. As a result, a corrosion-proof thin film layer, having the prescribed thickness and excellent uniformity, can be obtained, and the oxidization of the permanent magnet can completely be prevented.</abstract><edition>5</edition><oa>free_for_read</oa></addata></record> |
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| subjects | ALLOYS BASIC ELECTRIC ELEMENTS CHEMISTRY ELECTRICITY FERROUS OR NON-FERROUS ALLOYS INDUCTANCES MAGNETS METALLURGY SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES TRANSFORMERS TREATMENT OF ALLOYS OR NON-FERROUS METALS |
| title | JPH0644525B |
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