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：US11859271B2

公开(公告)日：2024-01-02

申请号：US16610285

申请日：2018-05-04

Applicant: REGENTS OF THE UNIVERSITY OF MINNESOTA

Inventor： Jian-Ping Wang ,  YanFeng Jiang ,  Md Mehedi ,  Yiming Wu ,  Bin Ma ,  Jinming Liu ,  Delin Zhang

IPC: C22C38/00 ,  C22C33/00 ,  H01F1/11 ,  H01F7/02 ,  H01F41/02

CPC classification number: C22C38/001 ,  C22C33/006 ,  H01F1/11 ,  H01F7/021 ,  H01F41/0253 ,  C22C2200/04 ,  C22C2202/02

Abstract: An example composition may include a plurality of grains including an iron nitride phase. The plurality of grains may have an average grain size between about 10 nm and about 200 nm. An example technique may include treating a composition including a plurality of grains including an iron-based phase to adjust an average grain size of the plurality of grains to between about 20 nm and about 100 nm. The example technique may include nitriding the plurality of grains to form or grow an iron nitride phase.

公开(公告)号：US11837393B2

公开(公告)日：2023-12-05

申请号：US17490800

申请日：2021-09-30

Applicant: REGENTS OF THE UNIVERSITY OF MINNESOTA

Inventor： Jian-Ping Wang ,  Bin Ma ,  Jinming Liu ,  Yiming Wu ,  YanFeng Jiang

IPC: H01F1/06 ,  C22C38/00 ,  B22F1/16 ,  B22F1/054 ,  B22F9/04 ,  C23C8/26 ,  C23C8/50 ,  C23C8/80 ,  H01F1/055 ,  H01F1/059 ,  C22C38/10 ,  B22F1/06

CPC classification number: H01F1/065 ,  B22F1/054 ,  B22F1/0553 ,  B22F1/06 ,  B22F9/04 ,  C22C38/00 ,  C22C38/001 ,  C22C38/10 ,  C23C8/26 ,  C23C8/50 ,  C23C8/80 ,  H01F1/059 ,  H01F1/0551 ,  H01F1/061 ,  B22F1/0547 ,  B22F2301/35 ,  B22F2302/20 ,  B22F2304/054 ,  H01F1/0552

Abstract: Example nanoparticles may include an iron-based core, and a shell. The shell may include a non-magnetic, anti-ferromagnetic, or ferrimagnetic material. Example alloy compositions may include an iron-based grain, and a grain boundary. The grain boundary may include a non-magnetic, anti-ferromagnetic, or ferrimagnetic material. Example techniques for forming iron-based core-shell nanoparticles may include depositing a shell on an iron-based core. The depositing may include immersing the iron-based core in a salt composition for a predetermined period of time. The depositing may include milling the iron-based core with a salt composition for a predetermined period of time. Example techniques for treating a composition comprising core-shell nanoparticles may include nitriding the composition.

公开(公告)号：US11161175B2

公开(公告)日：2021-11-02

申请号：US16340031

申请日：2017-10-06

Applicant: REGENTS OF THE UNIVERSITY OF MINNESOTA

Inventor： Jian-Ping Wang ,  Bin Ma ,  Jinming Liu ,  Yiming Wu ,  YanFeng Jiang

IPC: B22F1/02 ,  B22F1/00 ,  H01F1/055 ,  H01F1/059 ,  B22F9/04 ,  C23C8/26 ,  C23C8/50 ,  C23C8/80 ,  C22C38/00 ,  C22C38/10

Abstract: Example nanoparticles may include an iron-based core, and a shell. The shell may include a non-magnetic, anti-ferromagnetic, or ferrimagnetic material. Example alloy compositions may include an iron-based grain, and a grain boundary. The grain boundary may include a non-magnetic, anti-ferromagnetic, or ferrimagnetic material. Example techniques for forming iron-based core-shell nanoparticles may include depositing a shell on an iron-based core. The depositing may include immersing the iron-based core in a salt composition for a predetermined period of time. The depositing may include milling the iron-based core with a salt composition for a predetermined period of time. Example techniques for treating a composition comprising core-shell nanoparticles may include nitriding the composition.