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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 40 for “"Ceramic Matrix Composites"”.
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Test methods and analysis for glass-ceramic matrix composites
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1991.
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Pressureless Densification of Alumina - Titanium Diboride Ceramic Matrix Composites
… behavior of SHS produced Al2O3/TiB2 Ceramic Matrix Composites (CMCs). Previous research has shown SHS produced Al₂O₃/TiB₂ composites exhibited unique microstructural properties that contributed to high strength, fracture toughness, and hardness properties. Pressureless densification …
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Damage development and failure of fiber-reinforced ceramic matrix composites
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1989.
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Testing and properties of high temperature glass-ceramic matrix composites
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1987.
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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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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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Transverse fracture and fiber/matrix interface characteristics of hybrid ceramic matrix composites
<p>"Ceramic Matrix Composites (CMCs) represent an attractive class of engineering materials for use in high temperature, high wear and corrosive environments. Much effort has been made to ascertain and improve the strength and fracture characteristics of these materials. Approaches that have …
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Quasi-Static and Creep Behavior of Enhanced SIC/SIC Ceramic Matrix Composites
Continuous Fiber Reinforced Ceramic Composites (CFCC's) are being currently investigated as potential materials for high temperature applications such as combustor liners in stationary gas turbines. The creep behavior of woven Enhanced SiC/SiC composites was studied at temperatures from 600 to 1200 …
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Fatigue behavior of ceramic matrix composites at elevated temperatures under cyclic loading
… systems such as jet engines, fiber reinforced ceramic matrix composites are needed. An elevated temperature axial testing system is developed to investigate and characterize fatigue behavior of Nicalon fiber reinforced enhanced silicon carbide matrix. composites at 1800 of under fully reversed …
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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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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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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
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Tensile and uniaxial/multiaxial fatigue behavior of ceramic matrix composites at ambient and elevated temperatures
Increasing use of fiber reinforced ceramic matrix composites (CMC's) materials is needed, especially for hostile environments such as elevated temperatures. However, some fundamental issues regarding how these materials should be made for optimized performance are far from being settled. This study …
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Damage analysis and mechanical response of as-received and heat-treated Nicalon/CAS-II glass-ceramic matrix composites
… in air for 100 hours. Changes at the fiber/matrix interface/interphase due to post-processing heat treatments were also characterized. The combined effect of fiber debonding and transverse matrix cracking in both 90° and 0° plies plays an important role in damage development in [0/90]₄₅ …
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Effect of interfacial thermal conductance and fiber orientation on the thermal diffusivity/conductivity of unidirectional fiber-reinforced ceramic matrix composites
The role of an interfacial barrier at the fiber-matrix interface in the heat conduction behavior of an uniaxial silicon carbide fiber-reinforced reaction-bonded silicon nitride and the effect of fiber orientation on the heat conduction characteristics of carbon fiber-reinforced borosilicate glass …
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Modeling and analysis of the forced-flow thermal gradient chemical vapor infiltration process for fabrication of the ceramic matrix composites
… infiltration (FCVI) process for fabricating ceramic matrix composites (CMCs) was modeled and analyzed based on the finite element method (FEM). The modeling study was focused on the fabrication of silicon carbide (SiC) matrix composites from methyltrichlorosilane (MTS) precursors because of …
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Development of SiC whisker/chopped SiC fiber reinforced (Ca<sub>0.6</sub>,Mg<sub>0.4</sub>)Zr₄(PO₄)₆ ceramic matrix composites
… a<sub>0.6</sub>,Mg<sub>0.4</sub>)Zr₄(PO₄)₆ (CMZP) matrix composites containing 10, 20, and 30 vol % whiskers were produced using a glass encapsulated hot isostatic pressing (HIPing) technique. The best HIPing temperature, pressure, and time conditions to optimize composite density and strength were …
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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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Processing, microstructure and mechanical properties of alumina platelet reinforced 3Y-TZP and mullite composites
Ceramic matrix composites consisting of mullite and 3Y-TZP containing alumina platelet reinforcements were fabricated by suspension processing and pressureless sintered. The effect of the matrix on the microstructural development in the presence of alumina platelets were characterized. A systematic …
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Processing, characterization, and mechanical properties of beta silicon nitride whisker/silicon nitride matrix composites
Ceramic matrix composites, consisting of $\beta$-$\rm Si\sb3N\sb4$ whisker reinforced polycrystalline $\rm Si\sb3N\sb4$, were fabricated with controlled whisker/matrix interfaces, characterized on the microstructural level, and evaluated for mechanical reliability. As-received and coated …
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