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Introduction
Published in Longbiao Li, High-Temperature Mechanical Hysteresis in Ceramic-Matrix Composites, 2023
CMC material is composed of high-strength carbon or ceramic fiber and ceramic matrix. On the basis of inheriting the advantages of high-temperature resistance of monolithic ceramic, the purpose of increasing the toughness of the material is achieved through the design of toughening mechanism. CMC materials generally include four structural units: reinforcing fiber, ceramic matrix, interphase between reinforcing fiber and ceramic matrix, and surface environmental barrier coating.
Biocomposites as Implantable Biomaterials
Published in Yaser Dahman, Biomaterials Science and Technology, 2019
Infiltration or pressing methods are used to fabricate CMC. Hot pressing or the hot isostatic pressing (HIP) method is used to make dense reinforcement mixed-matrix powder. Through pressing methods, it is possible to achieve near-zero porosity. High pressure and temperature if used simultaneously may degrade fibers or can create strong interfacial bonds for fracture toughness reduction, which will reduce fracture toughness.
Design Properties of Materials
Published in Robert L. Mott, Joseph A. Untener, Applied Strength of Materials, Sixth Edition SI Units Version, 2017
Robert L. Mott, Joseph A. Untener
Ceramic matrix composites (CMCs) are preferred for high strength, high stiffness, high fracture toughness relative to ceramics alone, ability to operate at high temperatures, and low thermal expansion and are attractive for furnaces, engines, and aerospace applications. Common CMCs include carbon–carbon (C–C), silicon carbide–carbon (SiC–C), silicon carbide–silicon carbide (SiC–SiC), glass ceramic–silicon carbide, silicon carbide–lithium aluminosilicate (SiC–LAS), and silicon carbide–calcium aluminosilicate (SiC–CAS). Where the same basic material is listed as both the matrix and the reinforcement, the reinforcement is of a different form such as whiskers, chopped fibers, or strands to achieve the preferred properties.
Thermal and Mechanical Properties of Plain Woven Ceramic Matrix Composites by the Imaged-Based Mesoscopic Model
Published in Heat Transfer Engineering, 2023
Yasong Sun, Han Zeng, Jing Xin
For pursuing the increasing overall performance of aero and rocket engines, the working temperature is nearly 2,200 K, which is much higher than the superalloy melting point. Therefore, the development of high-temperature components based on the superalloy material encounters the bottleneck. Ceramic matrix composite (CMC) is a kind of high-temperature material and has been widely used in high-temperature components [1]. CMC is considered as one kind of potential material for the high-temperature components of advanced aerospace engines due to low density (only 1/3–1/4 of the density of superalloy), low thermal expansion coefficient, good corrosion resistance, and high heat resistance (theoretical maximum temperature up to 1,650 °C) [2]. In addition, advanced textile technology can further improve the damage resistance and crack propagation of CMC and prevent catastrophic failure. Textile CMC can be used in the high-temperature components of aero and rocket engines, such as combustors, integral turbines, guide vanes, and nozzles. It has a broad application prospect in replacing superalloys and refractory metals as high-temperature structural materials [3]. However, methods of design and analysis of these materials are still under development.
Studies on the combined effects of titania and silicon carbide on the phase developments and properties of carbon-clay based ceramic composite
Published in Cogent Engineering, 2019
Fatai Olufemi Aramide, O. D. Adepoju, Adeolu Adesoji Adediran, Abimbola Patricia Popoola
Ceramic matrix composites (CMCs) are very useful materials applicable in the area of demanding mechanical and thermal requirements. Although ceramic matrices are prone to brittle failure, CMCs have been developed to achieve quasi-ductile fracture behaviour and maintain all other advantages of monolithic ceramics at high temperatures. For instance, CMCs can be designed to be as strong as metals, while they are much lighter and with the ability to withstand much higher temperatures. These advantages led to their application in automotive and aerospace engineering (Silvestre, Silvestre, & de Brito, 2015). There are several factors upon which the properties of CMC depend, such as the quantity, distribution of the final formed and the processing route used for the synthesis. The raw materials and inclusion additives into the CMC have a great influence on phase evolution in the material and final property of the product (Elgamouz & Tijani, 2018). Many researchers have focussed research activities in this direction; trying to improve on the properties of existing CMC or developing new CMC of better service properties. Badiee et al. (Badiee, Ebadzadeh, & Golestani-Fard, 2001) studied the effects of CaO, MgO, TiO2 and ZrO2 on the mullitization process in Iranian andalusite located in Hamedan mines. They discovered that all, but ZrO2 favour the formation of mullite from andalusite.
Use of laser spot thermography for the non-destructive imaging of thermal fatigue microcracking of a coated ceramic matrix composite
Published in Quantitative InfraRed Thermography Journal, 2021
Thibaut Archer, Pierre Beauchêne, Bruno Passilly, Jean-Michel Roche
Due to their low density and good thermomechanical properties, CMC materials are currently under development for turbine engine applications [29]. Stability of CMCs in water vapour rich environments [30,31] requires the development of new environmental barrier coatings (EBCs). Through-thickness cracks, which can initiate and propagate under thermal gradients [32], can have a critical effect on the lifetime of the system [33].