Spraying for time - Abradable seals the key
Abstract
Abradable seals are explained and a brief history of their development is given. Abradable seals are made of high-temperature-resistant composite powders, such as nickel-coated graphite, that constitute a core material coated with metal. They must abrade easily if struck by turbine blades and be soft enough to prevent engine damage should they be blown back. Research done to improve abradable seals with respect to hardness, oxidation, resistance and temperature changes is stressed. The end result is a composite powder with good insulating properties and the ability to withstand temperatures up to 850 C.
- Publication:
-
Science Dimension
- Pub Date:
- March 1984
- Bibcode:
- 1984SciDi..16...13H
- Keywords:
-
- Abrasion;
- Engine Parts;
- Graphite;
- Nickel Coatings;
- Seals (Stoppers);
- Aircraft Engines;
- Composite Materials;
- Hardness;
- Oxidation Resistance;
- Refractory Materials;
- Turbine Blades;
- Engineering (General)