# US 10,478,911 B2 · Method of joining metals and non-metals with foil and products so joined

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- Number: US 10,478,911 B2
- Document ID: US10478911B2
- Status: Granted
- Kind: B2
- Application number: 15/296,123
- Filed: 2016-10-18
- Published: 2017-04-20
- Granted: 2019-11-19
- Earliest claimed: 2015-10-20
- Assignees: MHI Health Devices, LLC
- Applicants: Jainagesh Sekhar
- Inventors: Jainagesh Sekhar
- Web page: https://patentgrep.com/patent/US10478911B2

## CPC

- B23K 1/0056: {soldering by means of beams, e.g. lasers, electron beams [EB]}
- B23K 1/012: Soldering with the use of hot gas
- B23K 10/00: Welding or cutting by means of a plasma
- B23K 35/286: {Al as the principal constituent}
- B23K 2103/52: {Ceramics}
- B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM

## Abstract

A method for the joining of material including metal and non-metals employing foil positioned between as well as structures produced thereby is provided. Such a method may employ thermal plasma as a means to produce the heat necessary for such joining methods. The method may also entail the treating of surfaces of objects by the positioning of materials, including foil, on a surface and subsequent application of thermal plasma.

## Claims

### Claim 1

A method for the rapid thermal joining of metallic or non-metallic objects in a non-vacuum environment comprising generating a thermal plasma through the heating of a gaseous flow, placing a joining material between the objects, applying the thermal plasma at an average temperature of over 1100° C. to the objects and the joining material whereby the joining material experiences a rapid heat-up wherein the objects are joined together.

### Claim 2 (depends on 1)

The method of claim 1 wherein the thermal plasma is generated by a process where the plasma is produced by a heated fluid traveling through a tortuous path provided by two layers of a porous material separated by a gap wherein the porous material acts to provide multiple passageways for the heated fluid, wherein heat of the heated fluid is absorbed by the porous material and wherein the gap between the two layers of porous material allows for a residence time for the heated fluid wherein the combination of the heat absorbed by the porous material that defines the tortuous path and the gap results in enhanced temperatures and the rapid heat-up of the joining material.

### Claim 3 (depends on 1)

The method of claim 1 wherein the joining material is a foil.

### Claim 4 (depends on 1)

The method of claim 1 wherein the joining material is a powder.

### Claim 5 (depends on 1)

The method of claim 1 wherein the joining material is comprised of aluminum.

### Claim 6 (depends on 1)

The method of claim 1 wherein the joining material is comprised of carbon.

### Claim 7

A method for the rapid thermal treatment of surfaces of metal and non-metal objects in a non-vacuum environment comprising generating a thermal plasma through the heating of a gaseous flow, placing of a joining material on a surface of the objects and applying the thermal plasma at an average temperature of over 1100° C. to the surface and the joining material whereby the joining material experiences a rapid heat-up.

### Claim 8 (depends on 7)

The method of claim 7 wherein the joining material is a foil.

### Claim 9 (depends on 1)

The method of claim 1 wherein the rapid thermal joining is performed in an unenclosed environment.