Ceramic Turbine Part With Density Gradient Structure

The patent applies local quality by creating a density gradient within the ceramic part, where the base region has high density (low porosity) for structural strength, while the wall regions have progressively lower density (higher porosity) to reduce weight. This is achieved through controlled powder deposition and selective sintering, resulting in a part where material properties are optimized for each specific location's functional requirements.

The patent intentionally incorporates controlled porosity in the wall regions of the ceramic part. This porous structure reduces the volume of material that could contain critical defects, thereby improving reliability. The porous walls also eliminate the need for extensive machining to create cooling channels, as the porosity itself can serve as fluid circulation pathways, significantly simplifying manufacturing.

The patent implements local quality through a density gradient where the base remains dense for structural support while the walls have controlled porosity for cooling. The porous structure in the walls creates natural pathways for cooling fluid circulation, improving heat dissipation without requiring complex machined channels. This gradient structure is achieved through controlled powder deposition and selective sintering processes.

The patent resolves this contradiction by applying local quality through spatially varying porosity. The base region maintains high density (low porosity) to provide structural integrity and resistance to critical defects, while the wall regions have controlled porosity to reduce weight. The gradual transition from dense base to porous walls ensures that structural strength is maintained where needed while achieving weight reduction in less critical regions.