Surface modified magnetic material

Patent metadata

Field	Value
Publication number	US-10100414-B2
Application number	US-201213361334-A
Country	US
Kind code	B2
Filing date	Jan 30, 2012
Priority date	Jan 30, 2012
Publication date	Oct 16, 2018
Grant date	Oct 16, 2018

Abstract

An article exhibiting magnetic properties, a method for providing corrosion resistance to an article, and an electric machine element are disclosed. The article comprises a substrate comprising a first portion of a magnetic material, the magnetic material exhibiting magnetic properties. The article further comprises a transition layer comprising a second portion of the magnetic material and a first portion of a coating material. The transition layer is disposed on at least a portion of the substrate. The article further comprises an outer layer comprising a second portion of the coating material. The outer layer is disposed on at least a portion of the transition layer.

First claim

We claim:

1. An article exhibiting magnetic properties comprising:
a single substrate comprising a first portion of an iron-containing magnetic material, the iron-containing magnetic material exhibiting magnetic properties;
a transition layer comprising a second portion of the iron-containing magnetic material and a first portion of a coating material, the transition layer disposed on and completely surrounding the single substrate; and
an outer layer consists essentially of a second portion of the coating material, the outer layer disposed on and completely surrounding the transition layer, the transition layer completely separating the single substrate from the outer layer;

wherein the transition layer is in contact with and hermetically seals the single substrate,
wherein the outer layer is in contact with and hermetically seals the transition layer, and
wherein the first and second portions of the coating material consist essentially of one or more metals selected from the group consisting of tantalum, niobium, zirconium, platinum, silver and gold.

2. The article of claim 1 , wherein the coating material comprises tantalum.

3. The article of claim 1 , wherein the transition layer and the outer layer have a total combined thickness of about 0.001 inches to about 0.005 inches.

4. The article of claim 1 , wherein the article exhibits magnetic properties that are substantially similar to the magnetic properties exhibited by the single substrate.

5. An electric machine element comprising:
a single substrate comprising a first portion of an iron-containing magnetic material, wherein the single substrate exhibits magnetic properties;
a transition layer comprising a second portion of the iron-containing magnetic material and a first portion of a coating material, the transition layer disposed on and completely surrounding the single substrate; and
an outer layer consists essentially of a second portion of the coating material, the outer layer disposed on and completely surrounding the transition layer, the transition layer completely separating the single substrate from the outer layer;

wherein the electric machine element exhibits magnetic properties that are substantially similar to the magnetic properties exhibited by the single substrate,
wherein the transition layer is in contact with and hermetically seals the single substrate,
wherein the outer layer is in contact with and hermetically seals the transition layer, and
wherein the first and second portions of the coating material consist essentially of one or more metals selected from the group consisting of tantalum, niobium, zirconium, platinum, silver and gold.

6. The electric machine element of claim 5 , wherein the electric machine element comprises a component of a motor.

7. The electric machine element of claim 5 , wherein the electric machine element comprises a component of a generator.

8. The electric machine element of claim 5 , wherein the electric machine element comprises a component of a magnetic bearing.

Assignees

• Buresh Steve J
• Siemers Paul A
• Van Dam Jeremy
• Rebak Raul Basilio
• Gen Electric

Inventors

• Buresh Steve J
• Siemers Paul A
• Van Dam Jeremy
• Rebak Raul Basilio

Classifications

• H01F41/026

  protecting methods against environmental influences, e.g. oxygen, by surface treatment (magnetic particles with skin H01F1/061, H01F1/09, H01F1/24, H01F1/33 and G11B5/706) · CPC title

• Y10T428/31678

  Of metal · CPC title

• F16C2240/60

  Thickness, e.g. thickness of coatings · CPC title

• C23C28/023

  only coatings of metal elements only · CPC title

• F16C32/0468

  of moving parts of the magnetic circuit, e.g. of the rotor · CPC title