Patent ID: 9604886
Date: 2017-03-28
CPC Classifications: B82Y,C04B,Y10T

Claim:
1. A part made of ceramic matrix composite material comprising: fiber reinforcement of carbon or ceramic fibers and a majority-ceramic sequenced matrix having first matrix layers made of crack-deflector material alternating with second matrix layers made of ceramic material; wherein an interphase coating is interposed between the fibers and the majority-ceramic sequenced matrix, the interphase coating adhering to the fibers and to the majority-ceramic sequenced matrix and being formed of at least one sequence constituted by a first elementary interphase layer made of carbon surmounted by a second elementary interphase layer made of ceramic, the outer second elementary layer of the interphase coating being a ceramic layer having an outer surface formed by ceramic grains of size lying essentially in the range of 20 nm to 200 nm, with the presence of grains of size greater than 50 nm conferring roughness on the outer surface ensuring mechanical attachment with an adjacent first matrix layer.