公开(公告)号：US10822280B2

公开(公告)日：2020-11-03

申请号：US16116173

申请日：2018-08-29

Applicant: Rolls-Royce High Temperature Composites Inc.

Inventor： Stephen Harris ,  David Smolenski

IPC: C04B35/80 ,  C04B35/628 ,  C04B35/634 ,  C04B35/638 ,  C04B35/657 ,  C04B37/00 ,  B29C70/00 ,  B29C48/00 ,  B29C48/08 ,  B29B11/00 ,  B32B37/15 ,  B32B38/00 ,  C08J5/12 ,  B32B5/02 ,  B32B9/00 ,  C08J5/24 ,  B32B37/20

Abstract: A method of making a fiber preform for ceramic matrix composite (CMC) fabrication comprises laminating an arrangement of fibers between polymer sheets comprising an organic polymer, which may function as a fugitive binder during fabrication, to form a flexible prepreg sheet. A plurality of the flexible prepreg sheets are laid up in a predetermined geometry to form a stack, and the stack is heated to soften the organic polymer and bond together the flexible prepreg sheets into a bonded prepreg structure. Upon cooling of the bonded prepreg structure, a rigid preform is formed. The rigid preform is heated at a sufficient temperature to pyrolyze the organic polymer. Thus, a porous preform that may undergo further processing into a CMC is formed.

公开(公告)号：US20190185385A1

公开(公告)日：2019-06-20

申请号：US16116173

申请日：2018-08-29

Applicant: Rolls-Royce High Temperature Composites Inc.

Inventor： Stephen Harris ,  David Smolenski

IPC: C04B35/80 ,  C08J5/24 ,  C08J5/12 ,  C04B35/628 ,  C04B35/634 ,  C04B35/638 ,  C04B35/657 ,  B32B5/02 ,  B32B9/00 ,  B32B37/15 ,  B32B38/00

Abstract: A method of making a fiber preform for ceramic matrix composite (CMC) fabrication comprises laminating an arrangement of fibers between polymer sheets comprising an organic polymer, which may function as a fugitive binder during fabrication, to form a flexible prepreg sheet. A plurality of the flexible prepreg sheets are laid up in a predetermined geometry to form a stack, and the stack is heated to soften the organic polymer and bond together the flexible prepreg sheets into a bonded prepreg structure. Upon cooling of the bonded prepreg structure, a rigid preform is formed. The rigid preform is heated at a sufficient temperature to pyrolyze the organic polymer. Thus, a porous preform that may undergo further processing into a CMC is formed.