Anodic oxide based composite coatings of augmented thermal expansivity to eliminate thermally induced crazing
US10711363B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2015 |
| Grant date | Jul 14, 2020 |
| Priority date | — |
| Expiry date | Dec 5, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/185
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A process is disclosed for minimizing the difference in thermal expansivity between a porous anodic oxide coating and its corresponding substrate metal, so as to allow heat treatments or high temperature exposure of the anodic oxide without thermally induced crazing. A second phase of higher thermal expansivity than that of the oxide material is incorporated into the pores of the oxide in sufficient quantity to raise the coating's thermal expansion coefficient. The difference in thermal expansion between the anodic oxide coating and underlying metal substrate is reduced to a level such that thermal exposure is insufficient for any cracking to result. The second phase may be an electrodeposited metal, or an electrophoretically deposited polymer. The second phase may be uniformly deposited to a certain depth, or may be deposited at varying amounts among the pores.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.