Title: Method for forming a nitrogenation barrier and machine formed using a body having the nitrogenation barrier

Abstract

A method includes forming one or more oxide barrier layers on one or more protected portions of a magnetic, metallic body, and converting one or more unprotected portions of the magnetic, metallic body to a less magnetic material by exposing the magnetic metallic body having the one or more oxide barrier layers formed thereon to nitrogen. One or more protected portions of the magnetic, metallic body that are beneath the one or more oxide barrier layers are not converted to the less magnetic material. The method can be used to form one or more layers of a laminated electric motor.

Inventors:

Kool, Lawrence Bernard; Zou, Min; Zhang, Wanming; Corah, Susan; Klapper, Christopher Jay; Johnson, Francis; Buresh, Steve

Issue Date:

2020-06-02

Research Org.:

General Electric Co., Schenectady, NY (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1650980

Patent Number(s):

10673288

Application Number:

15/895,743

Assignee:

General Electric Company (Schenectady, NY)

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B32 - LAYERED PRODUCTS B32B - LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM

C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS

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B - PERFORMING OPERATIONS B32 - LAYERED PRODUCTS B32B - LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM

B32B15/01 - all layers being exclusively metallic {

C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS

C22C38/001 - {containing N}
C22C38/06 - containing aluminium
C22C38/30 - with cobalt
C22C38/38 - with more than 1.5% by weight of manganese
C22C38/54 - with boron
C22C38/58 - with more than 1.5% by weight of manganese

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01F - MAGNETS

H01F1/344 - {Ferrites, e.g. having a cubic spinel structure
H01F2003/106 - {Magnetic circuits using combinations of different magnetic materials}
H01F3/02 - made from sheets
H01F41/0233 - {Manufacturing of magnetic circuits made from sheets

H - ELECTRICITY H02 - GENERATION H02K - DYNAMO-ELECTRIC MACHINES

H02K1/02 - characterised by the magnetic material
H02K1/04 - characterised by the material used for insulating the magnetic circuit or parts thereof
H02K15/02 - of stator or rotor bodies
H02K15/12 - Impregnating, heating or drying of windings, stators, rotors or machines

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DOE Contract Number:  

EE0007755

Resource Type:

Patent

Resource Relation:

Patent File Date: 02/13/2018

Country of Publication:

United States

Language:

English

Subject:

36 MATERIALS SCIENCE