Methods and compositions for brazing

Patent metadata

Field	Value
Publication number	US-2016136762-A1
Application number	US-201414584663-A
Country	US
Kind code	A1
Filing date	Dec 29, 2014
Priority date	Nov 18, 2014
Publication date	May 19, 2016
Grant date	—

Abstract

A method includes disposing a braze material adjacent a first body and a second body; heating the braze material and forming a transient liquid phase; and transforming the transient liquid phase to a solid phase and forming a bond between the first body and the second body. The braze material includes copper, silver, zinc, magnesium, and at least one material selected from the group consisting of nickel, tin, cobalt, iron, phosphorous, indium, lead, antimony, cadmium, and bismuth.

First claim

What is claimed is:

1 . A method, comprising:
disposing a braze material adjacent a first body and a second body, wherein the braze material comprises copper, silver, zinc, magnesium, and at least one material selected from the group consisting of nickel, tin, cobalt, iron, phosphorous, indium, lead, antimony, cadmium, and bismuth; heating the braze material and forming a transient liquid phase; and transforming the transient liquid phase to a solid phase and forming a bond between the first body and the second body.

2 . The method of claim 1 , wherein disposing a braze material adjacent a first body and a second body comprises disposing a braze material comprising at least one intermetallic compound adjacent the first body and the second body.

3 . The method of claim 1 , wherein disposing a braze material adjacent a first body and a second body comprises disposing a braze material comprising a plurality of particles adjacent the first body and the second body.

4 . The method of claim 3 , wherein disposing a braze material comprising a plurality of particles adjacent the first body and the second body comprises disposing a braze material comprising a plurality of particles having an average particle size in a range from about 1 μm to about 15 μm adjacent the first body and the second body.

5 . The method of claim 1 , wherein disposing a braze material adjacent the first body and the second body comprises disposing a paste comprising at least a composition of the braze material adjacent the first body and the second body.

6 . The method of claim 1 , wherein disposing a braze material adjacent the first body and the second body comprises disposing a thin sheet comprising at least a composition of the braze material adjacent the first body and the second body.

7 . The method of claim 1 , wherein heating the braze material and forming a transient liquid phase comprises heating the braze material to a temperature in a range extending from about 200° C. to about 600° C.

8 . The method of claim 1 , further comprising, after the bonded first body and second body are used in an application, heating the solidified braze material to weaken the bond between the first body and the second body.

9 . The method of claim 8 , wherein heating the solidified braze material to weaken the bond between the first body and the second body comprises heating the solidified braze material to a temperature in a range extending from about 600° C. to about 800° C.

10 . The method of claim 8 , further comprising separating the first body from the second body.

11 . The method of claim 1 , wherein disposing a braze material adjacent a first body and a second body comprises disposing the braze material adjacent a previously formed joint between the first body and the second body.

12 . The method of claim 1 , wherein heating the braze material and forming a transient liquid phase comprises heating the braze material for at least about four hours.

13 . The method of claim 1 , wherein heating the braze material and forming a transient liquid phase comprises heating the braze material in an inert atmosphere.

14 . A braze material comprising:
copper; silver; zinc; magnesium; and at least one material selected from the group consisting of nickel, tin, cobalt, iron, phosphorous, indium, lead, antimony, cadmium, and bismuth.

15 . The braze material of claim 14 , wherein the braze material comprises metallic particles having an average particle size in a range from about 1 μm to about 15 μm.

16 . The braze material of claim 14 , further comprising an organic binder.

17 . The braze material of claim 14 , wherein the braze material comprises a first plurality of metallic particles and a second plurality of metallic particles interspersed with the first plurality of metallic particles.

18 . The braze material of claim 17 , wherein the first plurality of metallic particles comprises a first material having a first composition and the second plurality of metallic particles comprises a second material having a second composition different from the first composition.

19 . The braze material of claim 14 , wherein the braze material comprises at least one intermetallic compound.

20 . The braze material of claim 14 , further comprising nanoparticles comprising at least one material selected from the group consisting of carbides, oxides, and borides.

Assignees

• Baker Hughes Inc

Inventors

• Chen Wei
• Bird Marc W
• Stevens John H

Classifications

• B22F1/10

  Metallic powder containing lubricating or binding agents; Metallic powder containing organic material · CPC title

• B22F1/09

  Mixtures of metallic powders · CPC title

• B23K1/0008

  specially adapted for particular articles or work · CPC title

• B23K35/3006 Primary

  Ag as the principal constituent · CPC title

• B23K1/0006

  Exothermic brazing · CPC title