Thermospray method for production of aluminum porous boiling surfaces
US4232056A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 16, 1979 |
| Grant date | Nov 4, 1980 |
| Priority date | — |
| Expiry date | Apr 16, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/937
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for producing a porous boiling surface with exceptional adhesion qualities and mechanical strength while at the same time maintaining the high degree of open cell porosity required for effective boiling heat transfer wherein a bond coating of pure aluminum is produced using a thermospray gun to melt an aluminum wire and impinge the molten aluminum particles against the metallic substrate in an inert gas stream projected from the gun nozzle located between 2 and 4 inches from the substrate. The bond coating has a porosity of less than 15 percent and a thickness not greater than 4 mils. The nozzle to substrate distance is then increased to 4 to 10 inches and a top coating of pure aluminum is formed having a porosity greater than 18 percent and a thickness of at least four times the thickness of the bond coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.