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Showing 1 to 17 of 17 for “"ceramic matrix composite"”.
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Mechanical behavior of a ceramic matrix composite material
Monolithic ceramic materials have been used in industry for hundreds of years. These materials have proven their usefulness in many applications, yet, their potential for critical structural applications is limited. The existence of an imperfection in a monolithic ceramic on the order of several …
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CHARACTERIZATION OF CERAMIC MATRIX COMPOSITE MATERIALS USING MILLIMETER-WAVE TECHNIQUES
… describes studies that were carried out on Ceramic Matrix Composite (CMC) materials. These materials were provided by the Air Force Research Laboratory for evaluation in the millimeter-wave frequency region with the goal of developing Non-Destructive Evaluation techniques. This thesis …
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Nondestructive evaluation of a high temperature ceramic matrix composite material
… characterize a 2-D Nicalon-reinforced, CVI-SiC matrix composite before and after exposure to 1000, 1200, and 1400 °C in oxidizing atmospheres of air. Concurrently, the nondestructive testing methods used to detect thermally induced changes in the SiC/SiC composite were evaluated. All of the NDT …
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The Adhesion Strength of a Plasma Sprayed Silicon Bond Coating on a Silicon Carbide Ceramic Matrix Composite
Silicon-based ceramics and ceramic matrix composites (CMCs), such as silicon carbide (SiC) fiber reinforced SiC, are promising candidates for hot section components in next generation turbine engines. Environmental barrier coatings (EBCs) are essential for implementing these components as they …
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Performance Characterization of Ceramic Matrix Composites through Uniaxial Monotonic Tensile Testing
<p>Ceramic matrix composite (CMC) samples were tested in order to characterize their mechanical performance and provide metrics for material process refinement and component design. Monotonic, uniaxial tensile testing of an uncoated carbon fiber reinforced silicon carbide ceramic at room …
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Properties and performance of a ceramic composite component
… the properties and performance of a tubular, ceramic composite component. Eight test specimens were fabricated using an injection molding process with a borosilicate glass matrix reinforced with chopped graphite fibers. These specimens were then tested under quasi-static and cyclic loading at …
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Sodium sulfate corrosion of silicon carbide fiber-reinforced lithium aluminosilicate glass-ceramic matrix composites
… lithium aluminosilicate (LAS) glass-ceramic matrix composite was studied using Scanning Electron Microscope (SEM) and X-ray Diffraction (XRD). Changes in the microstructural chemical composition of the specimens were investigated. The samples provided by Naval Air Warfare Center …
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Tensile behavior of unidirectional and cross-ply ceramic matrix composites
The tensile behavior of two ceramic matrix composites (CMC's) was observed. The materials of interest in this study were a glass-ceramic matrix composite (GCMC) reinforced with Nicalon fibers and a Blackglas™ composite also reinforced with Nicalon fibers. Both had a symmetric cross-ply layup. …
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Durability of Ceramic Matrix Composites at Elevated Temperatures: Experimental Studies and Predictive Modeling
… the deformation and strength of an oxide/oxide ceramic matrix composite system under stress-rupture conditions were studied both experimentally and analytically. A rupture model for unidirectional composites which incorporates fiber strength statistics, fiber degradation, and matrix damage was …
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Heat Transfer Analysis of an Oblique Jet Impingement Cooling on CMC Rough Surface
<p>A Ceramic Matrix Composite is high strength and high temperature capability composite, utilized in components like heat shield of space vehicles, flame holders and disc brakes. To be used in both static and dynamic components of a future gas turbine engine and even with high temperature …
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Degradation and Failure Analysis of Environmental Barrier Coatings under Adverse Operating Environment: Multi-Physics Modelling
… coatings (EBCs) are essential for protecting ceramic matrix composite (CMC) substrates in advanced gas turbines and aero-engines. However, their durability is limited by thermo-mechanical stresses, oxidation, and water-vapor-induced degradation under high-temperature operating conditions. The …
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Evaluation of multilayer silicon carbide composite cladding under loss of coolant accident conditions
… of layers of monolithic SiC (mSiC) and SiC/SiC ceramic matrix composite (CMC) has been proposed. In this work, the mechanical performance of both the tubing and the endplug joint of two-layer SiC cladding is investigated under conditions associated with the LOCA. Specifically, SiC cladding …
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Design optimization of advanced PWR SiC/SiC fuel cladding for enhanced tolerance of loss of coolant conditions
… of three-layer silicon carbide (SiC) composite cladding is experimentally investigated under conditions associated with the loss of coolant accident (LOCA), and analytically under various conditions. Specifically, this work investigates SiC cladding mechanical performance after …
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Magnon and phonon thermal transport in oxides
… was able to map the thermal conductivity of SiC ceramic matrix composite (CMC) using TDTR. SiC composite has been a subject of study interest because of its potential application for nuclear fuel cladding. However, existing models only used the effective thermal conductivity or only assumed that …
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Application of advanced fuel concepts for use in innovative pressurized water reactors
… water reactor (PWR) using thoria as a fuel matrix has been compared to using urania. Two cladding options were considered: a 0.76 mm thick silicon carbide ceramic matrix composite (SiC CMC) and 0.57 mm thick standard Zircaloy cladding. A large benefit was found in using thoria compared to …
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Study of glass-ceramics and brazing alloys for joining oxide and non-oxide ceramic matrix composites in corrosive and high-temperature environments
L'abstract è presente nell'allegato / the abstract is in the attachment
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Plasma-based surface treatment for improving joint strength of joined ceramics and ceramic matrix composites
L'abstract è presente nell'allegato / the abstract is in the attachment