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1. (WO2019064679) ALUMINUM ALLOY SUBSTRATE FOR MAGNETIC DISKS, METHOD FOR PRODUCING SAME, AND MAGNETIC DISK USING SAID ALUMINUM ALLOY SUBSTRATE FOR MAGNETIC DISKS
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Pub. No.: WO/2019/064679 International Application No.: PCT/JP2018/018817
Publication Date: 04.04.2019 International Filing Date: 15.05.2018
IPC:
C22C 21/00 (2006.01) ,C22F 1/04 (2006.01) ,G11B 5/73 (2006.01) ,G11B 5/82 (2006.01) ,G11B 5/84 (2006.01) ,G11B 25/04 (2006.01) ,C22F 1/00 (2006.01)
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
21
Alloys based on aluminium
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
F
CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS OR NON-FERROUS ALLOYS
1
Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
04
of aluminium or alloys based thereon
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5
Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
62
Record carriers characterised by the selection of the material
73
Base layers
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5
Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
74
Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum
82
Disc carriers
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5
Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
84
Processes or apparatus specially adapted for manufacturing record carriers
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
25
Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing
04
using flat record carriers, e.g. disc, card
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
F
CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS OR NON-FERROUS ALLOYS
1
Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
Applicants:
株式会社UACJ UACJ CORPORATION [JP/JP]; 東京都千代田区大手町一丁目7番2号 1-7-2, Otemachi, Chiyoda-ku, Tokyo 1000004, JP
古河電気工業株式会社 FURUKAWA ELECTRIC CO., LTD. [JP/JP]; 東京都千代田区丸の内二丁目2番3号 2-3, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008322, JP
Inventors:
北脇 高太郎 KITAWAKI Kotaro; JP
畠山 英之 HATAKEYAMA Hideyuki; JP
中山 賢 NAKAYAMA Takashi; JP
藤井 康生 FUJII Yasuo; JP
熊谷 航 KUMAGAI Wataru; JP
Agent:
木村 満 KIMURA MITSURU; 東京都千代田区神田錦町二丁目7番地 協販ビル2階 2nd Floor, Kyohan Building, 7, Kandanishiki-cho 2-chome, Chiyoda-ku, Tokyo 1010054, JP
Priority Data:
2017-18916928.09.2017JP
Title (EN) ALUMINUM ALLOY SUBSTRATE FOR MAGNETIC DISKS, METHOD FOR PRODUCING SAME, AND MAGNETIC DISK USING SAID ALUMINUM ALLOY SUBSTRATE FOR MAGNETIC DISKS
(FR) SUBSTRAT EN ALLIAGE D’ALUMINIUM POUR DISQUES MAGNÉTIQUES, SON PROCÉDÉ DE PRODUCTION, ET DISQUE MAGNÉTIQUE UTILISANT LEDIT SUBSTRAT EN ALLIAGE D’ALUMINIUM POUR DISQUES MAGNÉTIQUES
(JA) 磁気ディスク用アルミニウム合金基板及びその製造方法、ならびに、当該磁気ディスク用アルミニウム合金基板を用いた磁気ディスク
Abstract:
(EN) An aluminum alloy substrate for magnetic disks, which is formed from an aluminum alloy that contains 0.4-3.0 mass% (hereinafter referred to as "%") of Fe, less than 0.10% of Si and less than 0.10% of Mg, with the balance being made up of Al and unavoidable impurities, and wherein Al-Fe intermetallic compounds having a maximum length of 2 μm or more but less than 3 μm are dispersed at a distribution density of 1,000 compounds/mm2 or more and Mg-Si intermetallic compounds having a maximum length of 1 μm or more are dispersed at a distribution density of 1 compound/mm2 or less; a method for producing this aluminum alloy substrate for magnetic disks; and a magnetic disk which is obtained by arranging an electroless Ni-P plating layer on the surface of this aluminum alloy substrate for magnetic disks, and subsequently arranging a magnetic layer on the electroless Ni-P plating layer.
(FR) La présente invention concerne un substrat en alliage d’aluminium pour disques magnétiques, qui est formé d’un alliage d’aluminium qui contient de 0,4 à 3,0 % en masse (appelé ci-après "%") de Fe, moins de 0,10 % de Si et moins de 0,10 % de Mg, le reste étant constitué de Al et d’impuretés inévitables, et des composés intermétalliques Al-Fe ayant une longueur maximale de 2 µm ou plus mais moins de 3 µm étant dispersés à une densité de distribution de 1 000 composés/mm2 ou plus et des composés intermétalliques Mg-Si ayant une longueur maximale de 1 µm ou plus étant dispersés à une densité de distribution de 1 composé/mm2 ou moins ; un procédé de production de ce substrat en alliage d’aluminium pour disques magnétiques ; et un disque magnétique qui est obtenu par agencement d’une couche de placage de Ni-P autocatalytique sur la surface de ce substrat en alliage d’aluminium pour disques magnétiques, et ensuite l’agencement d’une couche magnétique sur la couche de placage de Ni-P autocatalytique.
(JA) Fe:0.4~3.0mass%(以下、「%」)、Si:0.10%未満、Mg:0.10%未満を含有し、残部Al及び不可避不純物からなるアルミニウム合金からなり、2μm以上3μm未満の最長径を有するAl-Fe系金属間化合物が1000個/mm以上の分布密度で分散し、1μm以上の最長径を有するMg-Si系金属間化合物が1個/mm以下の分布密度で分散する磁気ディスク用アルミニウム合金基板及びその製造方法、ならびに、当該磁気ディスク用アルミニウム合金基板の表面に、無電解Ni-Pめっき処理層とその上の磁性体層が設けられている磁気ディスク。
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)