Skip to Main content Skip to Navigation
New interface
Journal articles

Influence of Texture and Thickness of Pyrocarbon Coatings as Interphase on the Mechanical Behavior of Specific 2.5D SiC/SiC Composites Reinforced with Hi-Nicalon S Fibers

Emilien Buet 1 James Braun 2 Cédric Sauder 2, * 
* Corresponding author
2 LTMEx - Laboratoire des Technologies des Matériaux EXtrêmes
SRMA - Service des Recherches Métallurgiques Appliquées : DEN/DMN/SRMA
Abstract : In the framework of nuclear applications of SiC/SiC composites, the influence of pyrocarbon interphase texture and thickness on the mechanical behavior both on as processed materials and on irradiated materials is a major concern. Thus, the PyC interphase influence has to be clearly addressed to define its optimal chemical vapor infiltration processing parameters. For this pur-pose, specific 2.5D SiC/SiC composites reinforced with Hi-Nicalon S fibers and with two kind of PyC texture and thickness were produced. Transmission electronic microscopy allowed PyC thickness and microstructure/texture characterizations, whereas push-out and tensile tests were employed as experimental mechanical procedures. Original result is that PyC nature directly in-fluences the Interfacial shear stress and failure mode of the weakest interface, regardless of PyC thickness. Adhesive failure or cohesive failure are highlighted depending on the PyC CVI deposition mechanisms. Similar post irradiation characterizations will be required to assess the role of irradiation on the PyC microstructure/texture evolution and mechanical behaviors of these materials.
Complete list of metadata

https://hal-cea.archives-ouvertes.fr/cea-03838799
Contributor : Contributeur MAP CEA Connect in order to contact the contributor
Submitted on : Thursday, November 3, 2022 - 6:30:14 PM
Last modification on : Sunday, November 6, 2022 - 3:26:07 AM

File

Buet et al, 2022, influence of...
Files produced by the author(s)

Identifiers

Citation

Emilien Buet, James Braun, Cédric Sauder. Influence of Texture and Thickness of Pyrocarbon Coatings as Interphase on the Mechanical Behavior of Specific 2.5D SiC/SiC Composites Reinforced with Hi-Nicalon S Fibers. Coatings, 2022, 5 (12), pp.573. ⟨10.3390/coatings12050573⟩. ⟨cea-03838799⟩

Share

Metrics

Record views

0

Files downloads

0