Ceramic core and method of making
US6578623B2 · kind B2 · utility
24Cited by
19References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 1, 2001 |
| Grant date | Jun 17, 2003 |
| Priority date | — |
| Expiry date | Oct 12, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C3/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Method of making a ceramic core for casting an industrial gas turbine engine airfoil having a large airfoil pitch by forming a precursor core (chill) of smaller dimensions than the final desired ceramic core, firing the chill, applying a thin ceramic skin to the fired chill to form a coated core of final dimensions, and then firing the coated core. Firing of the thin ceramic skin reduces airfoil pitch shrinkage resulting from the latter firing operation to reduce overall core dimensional tolerance variations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.