Process for applying thermal barrier coatings to metals
US4483720A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 1981 |
| Grant date | Nov 20, 1984 |
| Priority date | — |
| Expiry date | Nov 27, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12951
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Process for applying a protective coating to a metal substrate which provides a thermal barrier and a barrier against oxidation of the substrate. The coating material is a mixture of two metals M.sub.1 and M.sub.2, e.g., cerium (M.sub.1) and cobalt (M.sub.2), one of which when exposed to an atmosphere containing a low partial pressure of oxygen and at a high temperature forms a stable oxide, the other of which does not form a stable oxide under such conditions. A coating consisting of such a metal alloy or mixture is subjected to such conditions to produce an outer oxide layer of metal M.sub.1 and an inner metal layer of M.sub.2 alloyed with one or more components of the substrate. The oxide layer provides thermal and oxidation protection and the inner layer bonds the coating to the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.