JPH0576521B
PURPOSE:To lessen the deterioration of magnetic characteristics as a result of cutting by injecting hard powder under pressure to the surface of a sintered magnet body consisting essentially of a specific rare earth, B and Fe to remove the surface layer and depositing a thin Al film on such surface....
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| creator | HAYAKAWA TETSUHARU HAMADA SHIGEKI |
| description | PURPOSE:To lessen the deterioration of magnetic characteristics as a result of cutting by injecting hard powder under pressure to the surface of a sintered magnet body consisting essentially of a specific rare earth, B and Fe to remove the surface layer and depositing a thin Al film on such surface. CONSTITUTION:The sintered permanent magnet body which consists essentially of 10-30atom% R, 2-28% B and 65-80% Fe and of which the main phase consists of a tegragonal crystal phase is molded. R is >=1 kinds among Nd, Pr, Dy, Ho and Tb and >=1 kinds among La, Ce, Sm, Gd, Er, Eu, Tm, Yb, La and Y. >=1 kinds of the hard powders such as Al2O3 powder having 20-35mum average grain size and >=5 Mohs hardness are injected together with a pressurized gas such as gaseous N2 under 1.0-6.0kg/cm pressure for 0.5-60min onto the surface of such magnet body to remove the surface layer of the magnet body. The thin Al film layer is then deposited by an ion plating method, etc. on such surface. The deterioration of the magnetic characteristics by cutting are lessened and the excellent corrosion resistance is provided to the magnet body by the above-mentioned method. |
| format | Patent |
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CONSTITUTION:The sintered permanent magnet body which consists essentially of 10-30atom% R, 2-28% B and 65-80% Fe and of which the main phase consists of a tegragonal crystal phase is molded. R is >=1 kinds among Nd, Pr, Dy, Ho and Tb and >=1 kinds among La, Ce, Sm, Gd, Er, Eu, Tm, Yb, La and Y. >=1 kinds of the hard powders such as Al2O3 powder having 20-35mum average grain size and >=5 Mohs hardness are injected together with a pressurized gas such as gaseous N2 under 1.0-6.0kg/cm pressure for 0.5-60min onto the surface of such magnet body to remove the surface layer of the magnet body. The thin Al film layer is then deposited by an ion plating method, etc. on such surface. The deterioration of the magnetic characteristics by cutting are lessened and the excellent corrosion resistance is provided to the magnet body by the above-mentioned method.</description><edition>5</edition><language>eng</language><subject>ALLOYS ; BASIC ELECTRIC ELEMENTS ; CASTING ; CHEMICAL SURFACE TREATMENT ; CHEMISTRY ; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL ; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL ; COATING MATERIAL WITH METALLIC MATERIAL ; COATING METALLIC MATERIAL ; DIFFUSION TREATMENT OF METALLIC MATERIAL ; ELECTRICITY ; FERROUS OR NON-FERROUS ALLOYS ; INDUCTANCES ; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL ; MAGNETS ; MAKING METALLIC POWDER ; MANUFACTURE OF ARTICLES FROM METALLIC POWDER ; METALLURGY ; PERFORMING OPERATIONS ; POWDER METALLURGY ; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES ; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION ; TRANSFORMERS ; TRANSPORTING ; TREATMENT OF ALLOYS OR NON-FERROUS METALS ; WORKING METALLIC POWDER</subject><creationdate>1993</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=19931022&DB=EPODOC&CC=JP&NR=H0576521B2$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19931022&DB=EPODOC&CC=JP&NR=H0576521B2$$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>JPH0576521B</title><description>PURPOSE:To lessen the deterioration of magnetic characteristics as a result of cutting by injecting hard powder under pressure to the surface of a sintered magnet body consisting essentially of a specific rare earth, B and Fe to remove the surface layer and depositing a thin Al film on such surface. CONSTITUTION:The sintered permanent magnet body which consists essentially of 10-30atom% R, 2-28% B and 65-80% Fe and of which the main phase consists of a tegragonal crystal phase is molded. R is >=1 kinds among Nd, Pr, Dy, Ho and Tb and >=1 kinds among La, Ce, Sm, Gd, Er, Eu, Tm, Yb, La and Y. >=1 kinds of the hard powders such as Al2O3 powder having 20-35mum average grain size and >=5 Mohs hardness are injected together with a pressurized gas such as gaseous N2 under 1.0-6.0kg/cm pressure for 0.5-60min onto the surface of such magnet body to remove the surface layer of the magnet body. The thin Al film layer is then deposited by an ion plating method, etc. on such surface. The deterioration of the magnetic characteristics by cutting are lessened and the excellent corrosion resistance is provided to the magnet body by the above-mentioned method.</description><subject>ALLOYS</subject><subject>BASIC ELECTRIC ELEMENTS</subject><subject>CASTING</subject><subject>CHEMICAL SURFACE TREATMENT</subject><subject>CHEMISTRY</subject><subject>COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL</subject><subject>COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL</subject><subject>COATING MATERIAL WITH METALLIC MATERIAL</subject><subject>COATING METALLIC MATERIAL</subject><subject>DIFFUSION TREATMENT OF METALLIC MATERIAL</subject><subject>ELECTRICITY</subject><subject>FERROUS OR NON-FERROUS ALLOYS</subject><subject>INDUCTANCES</subject><subject>INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL</subject><subject>MAGNETS</subject><subject>MAKING METALLIC POWDER</subject><subject>MANUFACTURE OF ARTICLES FROM METALLIC POWDER</subject><subject>METALLURGY</subject><subject>PERFORMING OPERATIONS</subject><subject>POWDER METALLURGY</subject><subject>SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES</subject><subject>SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION</subject><subject>TRANSFORMERS</subject><subject>TRANSPORTING</subject><subject>TREATMENT OF ALLOYS OR NON-FERROUS METALS</subject><subject>WORKING METALLIC POWDER</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1993</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZOD2CvAwMDU3MzUydOJhYE1LzClO5YXS3AxKbq4hzh66qQX58anFBYnJqXmpJfFIOpyMjIlSBAB7WxxC</recordid><startdate>19931022</startdate><enddate>19931022</enddate><creator>HAYAKAWA TETSUHARU</creator><creator>HAMADA SHIGEKI</creator><scope>EVB</scope></search><sort><creationdate>19931022</creationdate><title>JPH0576521B</title><author>HAYAKAWA TETSUHARU ; HAMADA SHIGEKI</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JPH0576521BB23</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1993</creationdate><topic>ALLOYS</topic><topic>BASIC ELECTRIC ELEMENTS</topic><topic>CASTING</topic><topic>CHEMICAL SURFACE TREATMENT</topic><topic>CHEMISTRY</topic><topic>COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL</topic><topic>COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL</topic><topic>COATING MATERIAL WITH METALLIC MATERIAL</topic><topic>COATING METALLIC MATERIAL</topic><topic>DIFFUSION TREATMENT OF METALLIC MATERIAL</topic><topic>ELECTRICITY</topic><topic>FERROUS OR NON-FERROUS ALLOYS</topic><topic>INDUCTANCES</topic><topic>INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL</topic><topic>MAGNETS</topic><topic>MAKING METALLIC POWDER</topic><topic>MANUFACTURE OF ARTICLES FROM METALLIC POWDER</topic><topic>METALLURGY</topic><topic>PERFORMING OPERATIONS</topic><topic>POWDER METALLURGY</topic><topic>SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES</topic><topic>SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION</topic><topic>TRANSFORMERS</topic><topic>TRANSPORTING</topic><topic>TREATMENT OF ALLOYS OR NON-FERROUS METALS</topic><topic>WORKING METALLIC POWDER</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>JPH0576521B</title><date>1993-10-22</date><risdate>1993</risdate><abstract>PURPOSE:To lessen the deterioration of magnetic characteristics as a result of cutting by injecting hard powder under pressure to the surface of a sintered magnet body consisting essentially of a specific rare earth, B and Fe to remove the surface layer and depositing a thin Al film on such surface. CONSTITUTION:The sintered permanent magnet body which consists essentially of 10-30atom% R, 2-28% B and 65-80% Fe and of which the main phase consists of a tegragonal crystal phase is molded. R is >=1 kinds among Nd, Pr, Dy, Ho and Tb and >=1 kinds among La, Ce, Sm, Gd, Er, Eu, Tm, Yb, La and Y. >=1 kinds of the hard powders such as Al2O3 powder having 20-35mum average grain size and >=5 Mohs hardness are injected together with a pressurized gas such as gaseous N2 under 1.0-6.0kg/cm pressure for 0.5-60min onto the surface of such magnet body to remove the surface layer of the magnet body. The thin Al film layer is then deposited by an ion plating method, etc. on such surface. The deterioration of the magnetic characteristics by cutting are lessened and the excellent corrosion resistance is provided to the magnet body by the above-mentioned method.</abstract><edition>5</edition><oa>free_for_read</oa></addata></record> |
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| language | eng |
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| subjects | ALLOYS BASIC ELECTRIC ELEMENTS CASTING CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL ELECTRICITY FERROUS OR NON-FERROUS ALLOYS INDUCTANCES INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL MAGNETS MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER METALLURGY PERFORMING OPERATIONS POWDER METALLURGY SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TRANSFORMERS TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS WORKING METALLIC POWDER |
| title | JPH0576521B |
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