COMPOSITION AND METHOD OF INVESTMENT CASTING FOR ADVANCED GAS TURBINE GEOMETRIES

摘要

A composition of a ceramic shell mold, a method of using the ceramic shell mold in investment casting of a structural part, and a structural part formed therefrom is provided. The ceramic shell mold has one or more investment layers formed from slurries and interlayer barriers formed over the investment layers. The interlayer barriers include a self-lubricating soluble solution and grit having a predetermined grit size that is a function of the feature spacing within the structural part. The grit size of each sequential interlayer barrier is at least as large as the grit size of each preceding sequential interlayer barrier.