A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
POROSITY GRADIENT PREFORM ARCHITECTURE FOR HIGH TEMPERATURE COMPOSITES
A porosity gradient fibrous preform includes a first fabric-resin layer having a first plurality of fibers and a first resin and a second fabric-resin layer having a second plurality of fibers and a second resin, the second fabric-resin layer being positioned further outward from a center of the porosity gradient fibrous preform than the first fabric-resin layer. The first resin is different from the second resin so as to generate sequentially increasing porosity in the preform prior to a CVI densification step. The sequentially increasing porosity can be achieved, for example, by selecting resins for each layer with sequentially increasing moisture content, by selecting resins for each layer with sequentially decreasing char yield, and/or adding black carbon powder to interior located fabric-resin layers.
POROSITY GRADIENT PREFORM ARCHITECTURE FOR HIGH TEMPERATURE COMPOSITES
A porosity gradient fibrous preform includes a first fabric-resin layer having a first plurality of fibers and a first resin and a second fabric-resin layer having a second plurality of fibers and a second resin, the second fabric-resin layer being positioned further outward from a center of the porosity gradient fibrous preform than the first fabric-resin layer. The first resin is different from the second resin so as to generate sequentially increasing porosity in the preform prior to a CVI densification step. The sequentially increasing porosity can be achieved, for example, by selecting resins for each layer with sequentially increasing moisture content, by selecting resins for each layer with sequentially decreasing char yield, and/or adding black carbon powder to interior located fabric-resin layers.
POROSITY GRADIENT PREFORM ARCHITECTURE FOR HIGH TEMPERATURE COMPOSITES
THAI BRYAN (author) / PUJAR VIJAY V (author) / WAUGH KATHERINE E (author) / KOROLY CHRISTOPHER C (author)
2025-01-23
Patent
Electronic Resource
English
POROSITY GRADIENT PREFORM ARCHITECTURE FOR HIGH TEMPERATURE COMPOSITES
| European Patent Office | 2025
POROSITY GRADIENT PREFORM ARCHITECTURE FOR HIGH TEMPERATURE COMPOSITES
| European Patent Office | 2025
POROSITY GRADIENT PREFORM ARCHITECTURE FOR HIGH TEMPERATURE COMPOSITES
| European Patent Office | 2025
POROSITY GRADIENT PREFORM ARCHITECTURE FOR HIGH TEMPERATURE COMPOSITES
| European Patent Office | 2025
POROSITY GRADIENT PREFORM ARCHITECTURE FOR HIGH TEMPERATURE COMPOSITES
| European Patent Office | 2025