公开(公告)号：US20230192558A1

公开(公告)日：2023-06-22

申请号：US17556596

申请日：2021-12-20

Applicant: Raytheon Technologies Corporation

Inventor： Zachary P. Konopaske ,  Kathryn S. Read ,  Andrew J. Lazur

IPC: C04B35/80 ,  C04B35/628 ,  C04B35/64

CPC classification number: C04B35/80 ,  C04B35/62873 ,  C04B35/64 ,  C04B2235/422 ,  C04B2235/48 ,  C04B2235/5256 ,  C04B2235/5244 ,  C04B2235/616

Abstract: A method of forming a ceramic matrix composite includes applying a binder comprising water and 5% to 15% polyvinyl alcohol to a ceramic material and decomposing the binder to leave behind a discontinuous carbon layer within the ceramic material. The step of applying the binder includes one of a spraying, pipetting, painting, immersing, and pre-pregging technique.

公开(公告)号：US20230191656A1

公开(公告)日：2023-06-22

申请号：US17645190

申请日：2021-12-20

Applicant: Raytheon Technologies Corporation

Inventor： Kathryn S. Read ,  Andrew J. Lazur

IPC: B28B3/12 ,  B28B1/52 ,  B28B1/42 ,  B28B23/04

CPC classification number: B28B3/126 ,  B28B1/42 ,  B28B1/522 ,  B28B23/04

Abstract: A method of preparing a ceramic fabric for use in a ceramic matrix composite includes transforming a ceramic tow from a first tow geometry to a second tow geometry, thereby reducing a first dimension of the ceramic tow and increasing a second dimension of the ceramic tow orthogonal to the first dimension to produce a flattened tow. The method includes weaving or braiding the flattened ceramic tow to form a ceramic fabric.

公开(公告)号：US20230068197A1

公开(公告)日：2023-03-02

申请号：US17460688

申请日：2021-08-30

Applicant: Raytheon Technologies Corporation

Inventor： John D. Riehl ,  Kathryn S. Read

IPC: C04B35/80 ,  C04B35/628 ,  C04B35/638 ,  C04B35/634

Abstract: A tackified ceramic fabric sheet includes a pre-preg layer having a fabric of woven ceramic tows and a tackifier compound surrounding the tows and comprising 15% to 60% polyvinyl butyral with ethanol. The sheet further includes a removable first backing film layer on a first side of the pre-preg layer.