Review: creep of fibre-reinforced ceramic matrix composites

Abstract

The content of the review covers, first, generalities on creep. Then, the creep of ceramics and fibres, that are key constituents of fibre-reinforced ceramic matrix composites (CMCs) are addressed. The general features of ceramic matrix composites that may influence the creep behaviour and creep rupture are discussed. Emphasis is placed on microstructure-property relationships and load sharing between fibres and matrix that are critical for CMCs. Then, creep tests and the creep behaviour of various types of fibre-reinforced composites are presented. Mechanisms and models are discussed. The influence of various factors including composite structure, constituent properties (matrix and fibres), interfacial properties and environmental conditions are examined. The paper focuses on non-oxide composites like SiC/SiC that received much attention during the last three decades. Creep of oxide ceramics, fibres and composites are addressed more briefly.

Creep properties and damage mechanism of molded glass fiber reinforced plastic

“…The creep curves obtained by long‐term creep tests for 3000 h under different loads are shown in Figure 5A.The steady‐state creep rate is the slope of the creep curve in the second stage, which is an important index for evaluating the creep properties of materials. [ 24 ] The total strain during creep is composed of two parts: the instantaneous strain and the creep strain [ 38 ] The total strain at 3000 h , the instantaneous strain , and the steady‐state creep rate are included in Table 2. The histograms of the instantaneous and creep strains included in the 3000 h total strain for each specimen are shown in Figure 5B.…”

“…Creep is also an important mechanical property of composite materials, which refers to the phenomenon that the deformation gradually increases with time under a constant load lower than the tensile strength. [24][25][26][27] The creep mechanism in composites is often complex, which is mainly due to the resin matrix, [28,29] but is also significantly influenced by the fiber orientation and distribution. [30] Eftekhari et al [31] performed creep tests on short glass fiber reinforced injection molded thermoplastic composites in flat sheets.…”

A novel and predictive process of manufacturing 3DN C/SiC torque tube

“…With the rapid aerospace propulsion development in recent years, carbon fiber reinforced silicon carbide (C/ SiC) composite becomes one of the most crucial materials in ceramic matrix composite (CMC) family, for the superior specific strength and modulus, good corrosion resistance and ultrahigh temperature performance [1][2][3][4][5][6]. More researchers are focusing into CMC structural components like CMC tubes since CMC is used in engineering applications [7][8][9].…”

Effect of microstructure and chemical composition on subcritical crack growth in SiC-based fiber tows

“…Owning to their high specific strength at elevated temperature, creep resistance, low thermal expansion, high thermal conductivity, chemical inertness and weaving suitability, SiC-based fibers have become a strategic component for the long reinforcement of SiC/SiC Ceramic Matrix Composite (CMC), for application in power plant, jet engine or sport automotive [1,2]. Like many oxide [3][4][5][6][7] or non oxide [8][9][10][11] brittle materials, these fibers are however subjected to a thermally activated delayed failure under the combined effect of environment and subcritical stress (for temperature below the creep threshold <1100 °C [12]). A power law is commonly accepted to predict such lifetime (tf), relating the stress intensity factor (KI) to crack growth velocity (V) (Eq.…”