公开(公告)号：US20210043344A1

公开(公告)日：2021-02-11

申请号：US16965905

申请日：2019-01-29

Applicant: TDK CORPORATION

Inventor： Masaki TOMITA ,  Ryuji HASHIMOTO ,  Takashi WATANABE

IPC: H01F1/059

Abstract: A permanent magnet including R and T. R are rare earth elements including Sm and at least one selected from Y and Gd. T is Fe alone or Fe and Co. T maybe partly substituted with M, and M is one or more selected from Ti, V, Cr, Mo, W, Zr, Hf, Nb, Ta, Al, Si, Cu, Zn, Ga and Ge. In a total content of R, Sm content is 60 at % or more and 95 at % or less, and a total content of Y and Gd is 5 at % or more and 35 at % or less. The permanent magnet includes main phase crystal grains having a ThMn12 type crystal structure.

公开(公告)号：US20160276075A1

公开(公告)日：2016-09-22

申请号：US15074491

申请日：2016-03-18

Applicant: TDK CORPORATION

Inventor： Masashi ITO ,  Tomoko KITAMURA ,  Masaki TOMITA

IPC: H01F1/057

CPC classification number: H01F1/058

Abstract: The present invention provides a permanent magnet with a composition ratio of RXT(100-X-Y)CY having a main phase with Nd5Fe17 type crystal structure, wherein: R is one or more rare earth elements including Sm as a necessary element, and the rare earth elements are Sm, Y, La, Pr, Ce, Nd, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu; and T is one or more transition metal elements including Fe or a combination of Fe and Co as necessary elements; and 15

Abstract translation: 本发明提供一种组成比为具有Nd5Fe17型晶体结构的主相的RXT（100-XY）CY的永磁体，其中：R是一种或多种稀土元素，包括Sm作为必需元素，稀土 元素是Sm，Y，La，Pr，Ce，Nd，Eu，Gd，Tb，Dy，Ho，Er，Tm，Yb和Lu; T是一种或多种过渡金属元素，包括Fe或Fe和Co的组合作为必需元素; 和15