Preparation and oxidation protection of CVD SiC/a-BC/SiC coatings for 3D C/SiC composites

Effect of dissolved hydrogen on the corrosion behavior of chemically vapor deposited SiC in a simulated pressurized water reactor environment

“…Silicon carbide (SiC) ceramics and their composites have been considered for use as structural materials for high temperature applications (e.g., parts of engines and aerospace vehicles) because they have high chemical stability, superior high-temperature strength, low thermal expansion, and high thermal shock resistance [1][2][3][4]. They also have attractive properties regarding nuclear applications, including a low neutron absorption cross-section, low induced activation, and high resistance to neutron irradiation.…”

Effects of ZrC coating on mechanical properties of PIP-C/SiC composites

“…Anti-oxidation coatings, which may be based on carbides [7][8][9], silicides [10,11] or oxides [12][13][14], was a key technique for advanced composites.…”

Oxidation behavior of SiBC matrix modified C/SiC composites with different PyC interphase thicknesses

“…However matrix pores exist in C/SiC composites due to the "bottom-neck effect" during CVI process, which will act as diffusion paths of oxidizing species, restricting the application of C/SiC composites in oxidation environment. Liquid silicon infiltration (LSI), slurry infiltration and their combination have been used to produce dense C/SiC composites to fill the matrix pores by Si [6,7] or self-healing components such as B 4 C, SiB 4 , and SiBC [8][9][10][11][12]. The porosity of dense C/SiC composites is effectively reduced to less than 5% but higher processing temperature (41420 1C) aggravates the mismatch between coefficient of thermal expansion (CTE) of the fiber and matrix and brings larger thermal residual stress (TRS) on the composites, resulting in the formation of intrinsic matrix micro-cracks while cooling down from the fabrication temperature to room temperature [13][14].…”