Process for making abradable hybrid ceramic wall structures
US5080934A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 1991 |
| Grant date | Jan 14, 1992 |
| Priority date | — |
| Expiry date | Feb 7, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01D11/125
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Abradable wall structures for high temperature applications, such as in turbine housings and the like. The wall structures comprise a superalloy metal base plate supporting a superalloy metallic cellular structure, the cells of which are filled to a substantial extent with at least one ceramic core material providing high heat resistance, oxygen barrier and low thermal expansion properties. The invention involves the application of a porous or pore-forming surface composition to provide a corrosion-resistant, erosion-resistant abradable outer surface layer, the softness or porosity of which can be tailored to improve the abradability of the wall structure, while imparting oxidation-, corrosion- and erosion-resistance to the structure. The surface layer composition may comprise metal superalloy, ceramic or cermet base compositions containing fugitive or retained inert filler materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.