Inventors:
William E. Sikkenga - Twin Lake MI
Arthur W. Grumm - Montague MI
Assignee:
Howmet Research Corporation - Whitehall MI
International Classification:
B22D 3304
Abstract:
A multi-wall ceramic core assembly and method of making same wherein a plurality of individual thin wall, arcuate (e. g. airfoil shaped) core elements are formed in respective master dies to have close tolerance mating locating features that substantially prevent penetration of molten metal between the interlocked features during casting, the individual core elements are fired on ceramic supports to have integral locating features, the prefired core elements are assembled together using the locator features of adjacent core elements, and the assembled core elements are held together using a fugitive material. The multi-wall ceramic core assembly so produced comprises the plurality of spaced apart thin wall, arcuate core elements and located by the mated close tolerance locating features.