Manufactured metal objects with hollow channels and method for fabrication thereof
US11313041B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Jul 2, 2019 |
| Grant date | Apr 26, 2022 |
| Priority date | — |
| Expiry date | Nov 15, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12493
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method of forming a hollow structure in an additively manufactured object involves creating a pattern on a surface of a base material of the object with a sacrificial metal filler having a melting point of 350° C. or less, the pattern defining a shape of the hollow structure on the base material. A metal layering material is cold sprayed over the sacrificial metal filler and at least a portion of the base material. The sacrificial metal filler is removed from the pattern by melting the sacrificial metal filler without melting or deforming the base material or the metal layering material to leave the hollow structure in the object formed from the pattern. Non-standard cold spray conditions are used with the metal layering material to prevent damage and or displacement of the filler while still forming a coating of the metal layering material on the filler and base material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.