| 发明名称 | Alloy composition, Fe-based nano-crystalline alloy and forming method of the same | ||
| 摘要 | An alloy composition of Fe(100-X-Y-Z)BXPYCuz, where 4≦X≦14 atomic %, 0<Y≦10 atomic %, and 0.5≦Z≦2 atomic %. This alloy composition has an amorphous phase as a main phase. This alloy composition is used as a starting material and exposed to a heat-treatment so that nanocrystals comprising no more than 25 nm of bccFe can be crystallized. Thus, an Fe-based nano-crystalline alloy having superior magnetic properties can be obtained. | ||
| 申请公布号 | US9287028(B2) | 申请公布日期 | 2016.03.15 |
| 申请号 | US201013392441 | 申请日期 | 2010.07.20 |
| 申请人 | NEC TOKIN CORPORATION;TOHOKU UNIVERSITY | 发明人 | Urata Akiri;Yamada Yasunobu;Matsumoto Hiroyuki;Yoshida Shigeyoshi;Makino Akihiro |
| 分类号 | C21D6/00;H01F1/153;C22C33/00;C22C45/02;B22F1/00 | 主分类号 | C21D6/00 |
| 代理机构 | Holtz, Holtz & Volek PC | 代理人 | Holtz, Holtz & Volek PC |
| 主权项 | 1. An Fe-based nanocrystalline alloy formed from an alloy composition of the formula Fe(100-X-Y-Z)BXPYCuz having an amorphous phase as a main phase, wherein 79≦100-X-Y-Z≦86 atomic %, 4≦X≦9 atomic %, 1≦Y≦10 atomic %, and 0.5≦Z<1.2 atomic %, wherein the alloy composition has a first crystallization start temperature (Tx1) and a second crystallization start temperature (Tx2) which have a difference (ΔT=Tx2−Tx1) of 70 to 200° C., wherein the Fe-based nanocrystalline alloy is formed by heating the alloy composition to a temperature in a range of Tx1 −50° C. to Tx2 −77° C., wherein nanocrystals of the Fe-based nanocrystalline alloy have an average diameter of 5 to 25 nm existing in the amorphous phase, and wherein the Fe-based nano-crystalline alloy has coercivity of 20 A/m or less and a saturation magnetic flux density of 1.6 T or more. | ||
| 地址 | Miyagi JP | ||