Long-term ceramic matrix composite for aeroengine

Abstract

Three strategies were proposed to prolong the service life of continuous fiber-reinforced silicon carbide ceramic matrix composite (CMC-SiC), which served as thermal-structure components of aeroengine at thermo-mechanical-oxygenic coupling environment. As for some thermal-structure components with low working stress, improving the degree of densification was crucial to prolong the service life, and the related process approaches were recited. If the thermal-structure components worked under moderate stress, the matrix cracking stress (σmc) should be improved as far as possible. The fiber preform architecture, interface shear strength, residual thermal stress, and matrix strengthening were associated with σmc in this review. Introducing self-healing components was quite significant with the appearance of matrix microcracks when CMC-SiC worked at more severe environment for hundreds of hours. The damage can be sealed by glass phase originating from the reaction between self-healing components and oxygen. The effective self-healing temperature range of different self-healing components was first summarized and distinguished. The structure, composition, and preparation process of CMC-SiC should be systematically designed and optimized to achieve long duration target.

Phase‐field simulation of microscale crack propagation/deflection in SiCf/SiC composites with weak interphase

“…Due to the ability to operate at high temperature with high strength and toughness, continuous fiber-reinforced ceramic matrix composites (CMCs) are commonly used for thermal structural parts in the turbine engine, fusion reactors, and gas-cooled fast reactors, [1][2][3][4][5][6][7] and in some cases become irreplaceable with further increasing the service temperature. Particularly, CMCs are not only insensitive to cracks, but also have a much lower density than typical superalloys.…”

High‐strength SiC joints fabricated at a low‐temperature of 1400°C using a novel low activation filler of Praseodymium

“…Silicon carbide (SiC) is one of the promising candidates for advanced nuclear systems, aerospace, and the third‐generation semiconductor applications, due to its excellent high‐temperature mechanical properties, outstanding chemical stability, and remarkable irradiation‐damage‐resistance 1–9 . However, it is difficult to fabricate large size SiC‐based components with complex shapes due to their poor machinability 10–11 .…”

Formula optimization and thermodynamic evolution of high-performance large-sized porcelain thin ceramic tiles mainly enhanced by contrivable multi-phases

“…Various strategies have been proposed to enhance the mechanical properties of these ceramics, such as adding fibers and reinforcement phases, but most are too expensive and challenging to integrate into ceramic industries. [7][8][9] Zhong et al 10 demonstrated the effective improvement of mechanical properties for ceramic tiles using in situ mullite whiskers. Xiao et al 11 found that in situ mullite whiskers could be generated by strictly controlling the raw material ratio, making them suitable for preparing high-strength ceramic tiles in industrial manufacturing.…”