Original document(15 pages) Authorized document(15 pages) 中文版
    Disclosed is a novel thin ribbon of a rare earth/iron/boron-based magnet alloy prepared by quenching of an alloy melt by the method of strip casting, from which a sintered permanent magnet is obtained by the powder metallurgical method. The sintered permanent magnet can be imparted with greatly improved magnetic properties or, in particular, residual magnetic flux density when the thin alloy ribbon as the base material thereof has a metallographic phase structure containing 'four-phase regions' consisting of (a) an alpha-iron phase, (b) a R-rich phase, in which R is a rare earth element selected from praseodymium, neodymium, terbium and dysprosium, (c) a RxT4B4 phase, in which T is iron or a combination of iron and a transition metal element other than iron and rare earth elements and x is a positive number varying with the rare earth element, and (d) a R2T14B phase, in which R and T each have the same meaning as defined above, each phase being dispersed with a grain diameter in a limited range, in a volume fraction of from 1 to 10%.
Application Number
申请号
00104690 Application Date
申请日
2000.02.15
Title 名称 Rear earth/Fe/Boron base magnet alloy fast quenching thin strap
Publication Number
公开号
1267744 Publication Date
公开日
2000.09.27
Approval Pub. Date 2003.04.23 Granted Pub. Date 2003.04.23
International Classification 分类号 C22C38/16;H01F1/053;H01F1/057
Applicant(s) Name
申请人
Shin-Etsu Chemical Co., Ltd.
Address 地址
Inventor(s) Name 发明人 Hirota Koichi;Minowa Takehisa;Hashimoto Takahiro
Attorney & Agent 代理人 duan chengen

  
Preparation of solar energy photovoltaic material-carbon film
Chemical solution for forming silverskin and method for forming silverskin with the same chemical solution
Process for recovering acid from acid metal solution
Cathode electrolysis process for coloring copper surface
Lead-tin anode scavenger for chromium plating process
Process for scaling on alloy steel surface
Vertical pulling and zone melting process of producing monocrystalline silicon
Spinneret assembly for melting spinning and its assembling method
Polyurethane elastic silk and elastic braided fabric
Method and apparatus for treating rope shape materials
Note:All patent data come from State Intellectual Property Office of the People's Republic of China. If there were discrepancies between here and the State Intellectual Property office, the later is more accurate. The patent data is only for public exchange and learning purposes. We are not responsible for the adverse consequences with unverified use of the data.