Influence of an original manufacturing process on the properties and microstructure of SiC/SiC tubular composites

Abstract

SiC/SiC composites reinforced with Hi-Nicalon S 3 rd generation SiC fibers are promising candidates for high temperature aeronautical applications and fuel cladding in nuclear reactors. An original patented process was used to produce SiC/SiC tubular samples for dimensional and tensile mechanical characterizations. The process route is described in detail to further understanding of specific features.SiC/SiC samples show a low porosity and excellent geometrical tolerance. Highly reproducible tensile mechanical behavior is observed with good mechanical failure characteristics. Some specific features were highlighted during mechanical characterizations with loading/unloading sequences. For instance, an original mechanical behavior was observed before the onset of matrix multicracking (deviation from linearity). To our knowledge, it is the first time that this kind of behavior has been detected on SiC/SiC composites, due to the processing route leading to the microstructure of specific samples. 1. Introduction Among the Ceramic Matrix Composites (CMC), SiC/SiC composites and affiliates have aroused interest for challenging high-temperature applications such as aerospace [1], aeronautics [2], defense [3] or nuclear applications [4] for their excellent mechanical properties [5] and oxidation resistance [6] at

Oxidation of Silicon Carbide Composites for Nuclear Applications at Very High Temperatures in Steam

“…The final porosity volume fraction was below 10%. More details about the manufacturing process can be found in [18]. The samples were filled with graphite (used as a susceptor for the high-frequency (HF) inductive heating purpose [16]) and tightly sealed with end caps at both sides (Figure 2).…”

“…Thus, the reduced modulus, the hysteresis loops with area, and the residual strains were extracted from the experimental curves. Details about the procedure can be found in [18]. The samples strain was locally measured by means of a class 1 extensometer with a gauge length of 25 mm.…”

Mechanical property of Pyro-Carbon coated SiC fibers fabricated by continuous chemical vapor deposition method

“…The silicon carbide (SiC/SiC) composite is a candidate material for ATF cladding because of its high strength, excellent stability in high temperature and oxidation resistance, good irradiation resistance and low neutron absorption cross-section. Braun et al. (2019), Noda (2020) and Agarwal et al.…”

“…The silicon carbide (SiC/SiC) composite is a candidate material for ATF cladding because of its high strength, excellent stability in high temperature and oxidation resistance, good irradiation resistance and low neutron absorption cross-section. Braun et al (2019), Noda (2020) and Agarwal et al (2018) investigated SiC/SiC composite performances in reactor working conditions. The generation III SiC fibers with a high degree of crystallinity and nearstoichiometric were invented for nuclear application.…”

Effect of Interface Coating on High Temperature Mechanical Properties of SiC–SiC Composite Using Domestic Hi–Nicalon Type SiC Fibers

“…Therefore, SiC-SiC composite has a wide application prospect in the thermal protection system of aerospace vehicles and hot-end components of aircraft engines [1][2][3]. In addition, SiC-SiC composite with near stoichiometric (3rd generation) SiC fibers has high irradiation resistance, which is one of the most promising materials for structural application in nuclear fusion reactor and nuclear fission power system [4][5][6].…”