3D woven space filler
AssigneeRtx Corporation
InventorKathryn S. Read
Life of this patent
Estimating the term…
Abstract
A ceramic fiber preform includes a plurality of ceramic fiber plies arranged to define a wall, a void adjacent the wall, and an insert positioned within the void. The insert includes a first region having a first porosity and a second region in physical contact with the first region and having a second porosity. The first region and second region are formed from a woven ceramic material, the wall has a wall porosity, and the first porosity is less than at least one of the second porosity and the wall porosity.
Claims16
A ceramic fiber preform comprising:
- a plurality of ceramic fiber plies arranged to define a wall;
- a void adjacent the wall;
- and
- an insert positioned within the void, the insert comprising:
- a first region having a first porosity;
- a second region in physical contact with the first region and having a second porosity;
- and
- a third region in physical contact with at least one of the first region or the second region and having a third porosity;
- wherein the first region, the second region, and the third region are formed from a woven ceramic material;
- wherein the wall has a wall porosity;
- wherein the first region is positioned concentrically within the second region, and the second region is positioned concentrically within the third region;
- and
- wherein the first porosity is less than at least one of the second porosity and the wall porosity.
An insert for inclusion in a void of a ceramic fiber preform, the insert comprising:
- a first region having a first porosity;
- and
- a second region in physical contact with the first region and having a second porosity;
- a third region in physical contact with at least one of the first or second region and having a third porosity, wherein:
- the first region is positioned concentrically within the second region,
- the second region is positioned concentrically within the third region,
- the first porosity less than the second porosity,
- the second porosity is less than the third porosity,
- the first region has a first fiber volume fraction,
- the second region has a second fiber volume fraction less than the first fiber volume fraction, and
- the third region has a third fiber volume fraction less than the second fiber volume fraction.
A ceramic fiber preform comprising:
- a plurality of ceramic fiber plies arranged to define a wall;
- a void adjacent the wall having a wall porosity;
- and
- an insert positioned within the void, the insert comprising:
- a first region having a first porosity;
- a second region in physical contact with the first region and having a second porosity;
- and
- a third region in physical contact with at least one of the first or second region and having a third porosity;
- wherein the first region, second region, and the third region are formed from a woven ceramic material;
- wherein the first region is positioned concentrically within the second region, and
- the second region is positioned concentrically within the third region;
- and
- wherein the first porosity is less the second porosity, and the second porosity is less than the third porosity and the wall porosity.
Dependencies are inferred from the claim text.