公开(公告)号：US20220177379A1

公开(公告)日：2022-06-09

申请号：US17536216

申请日：2021-11-29

Applicant: Raytheon Technologies Corporation

Inventor： Shahram Amini ,  Wayde R. Schmidt ,  Tania Bhatia Kashyap ,  Mark A. Hermann ,  Paul Sheedy ,  Andi M. Limarga ,  Michael G. McCaffrey

IPC: C04B35/80 ,  C04B35/532 ,  C04B35/524 ,  B28B1/24 ,  B28B1/52 ,  C04B38/00

Abstract: A disclosed method of forming a ceramic article includes forming a pre-ceramic polymer article within a mold tool, and performing a first pyrolizing step on the initial pre-ceramic polymer article to form a ceramic article. The method further includes performing at least one pre-heat treatment polymer infiltration and pyrolizing (PIP) cycle on the ceramic article and an initial heat treatment cycle of the ceramic article after the at least one pre-heat treatment PIP cycle. Subsequent PIP cycles and heat treatment cycles are performed in combination to form a ceramic article including a desired density.