Methods of forming components of heat exchangers and methods of forming heat exchangers

Patent metadata

Field	Value
Publication number	US-11845132-B2
Application number	US-202217806916-A
Country	US
Kind code	B2
Filing date	Jun 14, 2022
Priority date	Sep 21, 2018
Publication date	Dec 19, 2023
Grant date	Dec 19, 2023

Abstract

A method of forming at least a component of a heat exchanger comprises introducing a feed material comprising a first portion including a matrix material and a second portion including a sacrificial material on a surface of a substrate, exposing at least the first portion to energy to form bonds between particles of the matrix material and form a first thickness of a structure, introducing additional feed material comprising the first portion over the first thickness of the structure, exposing the additional feed material to energy to form a second thickness of the structure, and removing the sacrificial material from the structure to form at least one channel in the structure. Related heat exchangers and components, and related methods are disclosed.

First claim

What is claimed is:

1. A method of forming at least a component of a heat exchanger, the method comprising:
introducing a feed material comprising a matrix material and a sacrificial material on a surface of a substrate;
selectively exposing at least the matrix material to focused energy to form bonds between particles of the matrix material and form a first thickness of a structure, the first thickness of the structure exhibiting a varying weight percent of at least one metal in at least one direction;
introducing additional feed material comprising the matrix material over the first thickness of the structure;
selectively exposing the additional feed material to focused energy to form a second thickness of the structure; and
removing the sacrificial material from the structure to form at least one channel in the structure.

2. The method of claim 1 , wherein removing the sacrificial material from the structure comprises melting the sacrificial material.

3. The method of claim 1 , wherein removing the sacrificial material comprises physically removing the sacrificial material from the structure.

4. The method of claim 1 , wherein introducing a feed material comprising a matrix material and a sacrificial material on a surface of a substrate comprises introducing a sacrificial material having a higher melting temperature than the matrix material on the surface of the substrate.

5. The method of claim 1 , further comprising exposing the first thickness of the structure and the second thickness of the structure to a heat treatment process prior to removing the sacrificial material from the structure.

6. The method of claim 1 , wherein selectively exposing at least the matrix material to focused energy comprises exposing the matrix material to energy from a laser.

7. The method of claim 1 , wherein removing the sacrificial material from the structure comprises:
chemically reacting the sacrificial material to form one or more reaction byproducts; and
removing the one or more reaction byproducts from the structure.

8. The method of claim 1 , wherein introducing a feed material comprises introducing a teed material comprising a resin material, the matrix material, and the sacrificial material dispersed within the resin material.

9. The method of claim 1 , wherein introducing a feed material comprising a matrix material on a surface of a substrate comprises introducing a feed material comprising a matrix material comprising at least one ceramic material and at least one metal material on the surface of the substrate.

10. The method of claim 1 , wherein introducing a feed material comprising a matrix material and a sacrificial material on a surface of a substrate comprises introducing a feed material comprising a sacrificial material comprising a flexible high temperature carbon fiber composite material on the surface of the substrate.

11. The method of claim 1 , wherein introducing a feed material comprising a matrix material and a sacrificial material on a surface of a substrate comprises introducing a feed material comprising a sacrificial material comprising one or more of polyphenylene sulfide (PPS), polyetheretherketone (PEEK), polyetherketone (PEK), polyphthalamide (PPA), how water moldable polyphthalamide (PPA), polyetherketoneketone (PEKK), polyimide (TPI), high temperature nylon (HTN), polysulfone (PSU), polyethersulfone (PES), polyetherimide (PEC), and liquid crystal polymer (LCP) on the surface of the substrate.

12. The method of claim 1 , further comprising exposing the at least one channel to energy after removing the sacrificial material from the structure to reduce a surface roughness of the at least one channel.

13. The method of claim 1 , wherein removing the sacrificial material from the structure to form at least one channel in the structure comprises forming the structure to exhibit a varying composition with a distance from the at least one channel.

14. The method of claim 1 , wherein selectively exposing at least the matrix material to focused energy to form bonds between particles of the matrix material and form a first thickness of a structure comprises forming bonds between particles of the matrix material without forming bonds between the sacrificial material and the matrix material.

15. The method of claim 1 , wherein introducing the feed material comprising a matrix material and a sacrificial material on the surface of a substrate comprises feeding the matrix material and the sacrificial material, the matrix material exhibiting a varying composition with a distance from the sacrificial material.

16. The method of claim 1 , wherein removing the sacrificial material from the structure to form the at least one channel comprises forming the at least one channel to comprise a wall thickness that changes with a distance from an inlet of the at least one channel.

17. The method of claim 1 , wherein removing the sacrificial material from the structure to form the at least one channel comprises forming the at least one channel with an increasing weight percent of a ceramic material with a distance from an inlet of the at least one channel.

18. The method of claim 1 , wherein the matrix material comprises a first matrix material and a second matrix material, and wherein:
introducing the feed material and removing the sacrificial material from the structure to form the at least one channel comprises forming the at least one channel to be defined by the first matrix material defining outer walls of the at least one channel, and
introducing the feed material and removing the sacrificial material from the structure to form the at least one channel comprises forming the at least one channel such that the second matrix material surrounds the first matrix material.

19. A method of forming at east a component of a heat exchanger, the method comprising:
introducing a teed material comprising a matrix material and a sacrificial material on a surface of a substrate;
selectively exposing at least the matrix material to focused energy to form bonds between particles of the matrix material and form a first thickness of a structure;
introducing additional feed material comprising the matrix material over the first thickness of the structure;
selectively exposing the additional feed material to focused energy to form a second thickness of the structure; and
removing the sacrificial material from the structure to form at least one channel in the structure,
wherein introducing a feed material comprising a matrix material and a sacrificial material on a surface of a substrate and removing the sacrificial material from the structure to form at least one channel in the structure comprises forming the structure to comprise a greater concentration of a ceramic material proximate the at least one channel than distal from the at least one channel.

20. A method of forming at least a component of a heat exchanger, the method comprising:
introducing a feed material comprising a matrix material and a sacrificial material on a surface of a substrate;
selectively exposing at least the matrix material to focused energy to form bonds between particles of the matrix material and form a first thickness of a structure;
introducing additional feed material comprising the matrix material over the first thickness of the structure;
selectively exposing the additional feed material to focused energy to form a second thickness of the structure; and
removing the sacrificial material from the structure to form at least one channel in the

Assignees

• Battelle Energy Alliance Llc

Inventors

• Van Rooyen Isabella J
• Sabharwall Piyush

Classifications

• B22F5/10 Primary

  of articles with cavities or holes, not otherwise provided for in the preceding subgroups · CPC title

• B22F10/22

  Direct deposition of molten metal · CPC title

• B22F10/25

  Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS] · CPC title

• B22F10/28

  Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM] · CPC title

• B22F10/43

  characterised by material · CPC title