Yttrium-added rare-earth permanent magnetic material and preparation method thereof

US11505852B2 · kind B2 · utility

Assignee

• GRIREM ADVANCED MATERIALS CO., LTD. · CN

Inventors

• Yang Luo · Amherst, US
• Xiao LIN · Suzhou, CN
• Guiyong Wu · Beijing, CN
• Jiajun Xie · Changde, CN
• Zilong Wang · Zhejiang, CN
• Wenlong Yan · Beijing, CN
• Zhongkai WANG · Columbia, US
• Dunbo Yu · Beijing, CN

Key dates

• Filing date: Feb 14, 2020
• Grant date: Nov 22, 2022
• Expiry date: Jul 28, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C2202/02
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The present disclosure discloses an yttrium (Y)-added rare-earth permanent magnetic material and a preparation method thereof. A chemical formula of the material expressed in atomic percentage is (YxRE1-x)aFebalMbNc, wherein 0.05≤x≤0.4, 7≤a≤13, 0≤b≤3, 5≤c≤20, and the balance is Fe, namely, bal=100-a-b-c; RE represents a rare-earth element Sm, or a combination of the rare-earth element Sm and any one or more elements of Zr, Nd and Pr; M represents Co and/or Nb; and N represents nitrogen. In the preparation method, the rare-earth element Y is utilized to replace the element Sm of a samarium-iron-nitrogen material. By regulating a ratio of the element Sm to the element Y, viscosity of an alloy liquid can be reduced, and an amorphous forming ability of the material is enhanced.