公开(公告)号：US12014853B2

公开(公告)日：2024-06-18

申请号：US17058882

申请日：2019-05-28

Applicant: REGENTS OF THE UNIVERSITY OF MINNESOTA

Inventor： Jian-Ping Wang ,  Jinming Liu ,  Bin Ma ,  Fan Zhang ,  Guannan Guo ,  Yiming Wu ,  Xiaowei Zhang

IPC: H01F1/04 ,  C01B21/06 ,  C23C8/02 ,  C23C8/26 ,  H01F1/047 ,  H01F41/02

CPC classification number: H01F1/047 ,  C01B21/0622 ,  C23C8/02 ,  C23C8/26 ,  H01F41/0253 ,  C01P2002/60 ,  C01P2002/72 ,  C01P2002/77 ,  C01P2004/02 ,  C01P2004/03 ,  C01P2004/04 ,  C01P2006/42

Abstract: In general, the disclosure is directed to bulk iron-nitride materials having a polycrystalline microstructure having pores including a plurality of crystallographic grains surrounded by grain boundaries, where at least one crystallographic grain includes an iron-nitride phase including any of a body centered cubic (bcc) structure, a body centered tetragonal (bct), and a martensite structure. The disclosure further describes techniques producing a bulk iron-nitride material having a polycrystalline microstructure, including: melting an iron source to obtain a molten iron source; fast belt casting the molten iron source to obtain a cast iron source; cooling and shaping the cast iron source to obtain a bulk iron-containing material having a body-centered cubic (bcc) structure; annealing the bulk iron-containing material at an austenite transformation temperature and subsequently cooling the bulk iron-containing material; and nitriding the bulk iron-containing material to obtain the bulk iron-nitride material.

公开(公告)号：US12018386B2

公开(公告)日：2024-06-25

申请号：US16949038

申请日：2020-10-09

Applicant: Regents of the University of Minnesota

Inventor： Jian-Ping Wang ,  Bin Ma ,  Guannan Guo

IPC: H01F1/147 ,  B22D23/00 ,  C22C38/00 ,  C23C8/34 ,  C23C8/80

CPC classification number: C23C8/34 ,  B22D23/00 ,  C22C38/001 ,  C23C8/80 ,  H01F1/147

Abstract: The disclosure describes a method that includes forming a soft magnetic material by a technique including melt spinning. The soft magnetic material includes at least one of: at least one of an α″-Fe16(NxZ1-x)2 phase domain or an α′-Fe8(NxZ1-x), where Z includes at least one of C, B, or O, and where x is a number greater than zero and less than one; or at least one of an α″-Fe16N2 phase domain or an α′-Fe8N phase domain, and at least one of an α″-Fe16Z2 phase domain or an α′-Fe8Z phase domain.

公开(公告)号：US20210123126A1

公开(公告)日：2021-04-29

申请号：US16949038

申请日：2020-10-09

Applicant: Regents of the University of Minnesota

Inventor： Jian-Ping Wang ,  Bin Ma ,  Guannan Guo

IPC: C23C8/34 ,  B22D23/00 ,  C23C8/80 ,  C22C38/00 ,  H01F1/147

Abstract: The disclosure describes a method that includes forming a soft magnetic material by a technique including melt spinning. The soft magnetic material includes at least one of: at least one of an α″-Fe16(NxZ1-x)2 phase domain or an α′-Fe8(NxZ1-x), where Z includes at least one of C, B, or O, and where x is a number greater than zero and less than one; or at least one of an α″-Fe16N2 phase domain or an α′-Fe8N phase domain, and at least one of an α″-Fe16Z2 phase domain or an α′-Fe8Z phase domain.