SiC_f/SiC composites were prepared by melt infiltration（MI）process, chemical vapor infiltration combined with precursor infiltration and pyrolysis（CVI+PIP）process and precursor infiltration and pyrolysis（PIP）process, respectively. The microstructures, compositions and properties of SiC_f/SiC composites prepared by different processes before and after water-oxygen corrosion at 1300 ℃ were characterized by scanning electron microscopy and its accompanying EDS and X-ray diffractometer. The results show that the distributions of oxygen elements of the fracture surface is obviously different in the composites prepared by different processes, and the phases after corrosion are closely related to the preparation processes. The strength retention rate and modulus retention rate of SiC_f/SiC composites prepared by MI process are 84% and 76% after water oxygen corrosion at 1300 ℃ for 50 hours. The strength retention rate of SiC_f/SiC composites prepared by CVI+PIP is 64%, and the modulus is increased by 6%. The SiC_f/SiC composites prepared by PIP process has a strength retention rate of 49% and a modulus increase of 17%. The composite materials prepared by MI process show oxidation mass gain, while the composite materials prepared by CVI+PIP and PIP process show oxidation mass loss, which are mainly related to its microstructures and compositions.

Carbide ceramic fibers are of significant importance for application in the high-tech areas of advanced aircraft engines, aerospace vehicles, and the nuclear industry due to their excellent properties, such as high tensile strength and elastic modulus, excellent high-temperature resistance, and oxidation resistance. This paper reviews the preparation and application of different carbide ceramic fibers, including SiC fibers and transition metal carbide (e.g., ZrC, HfC, and TaC) ceramic fibers. The preparation methods of carbide ceramic fibers are discussed in terms of different fiber diameters, represented by SiC fibers with variable weaving properties and functions due to their differences in diameter. Subsequently, the application of carbide ceramic fibers as high-temperature-resistant structural materials, catalyst carriers, sensors, and supercapacitors are summarized, and strategies for the future development of carbide ceramic fibers are proposed. This review aims to help researchers enhance their understanding of the preparation and utilization of carbide ceramic micro/nanofibers, advancing the development of high-performance carbide ceramic fibers.