Ceramic matrix composite

About: Ceramic matrix composite is a(n) research topic. Over the lifetime, 7807 publication(s) have been published within this topic receiving 117020 citation(s).

Fiber-reinforced composites : materials, manufacturing, and design

Abstract: Introduction Definition General Characteristics Applications Material Selection Materials Fibers Matrix Thermoset Matrix Thermoplastic Matrix Fiber Surface Treatments Fillers and Other Additives Incorporation of Fibers into Matrix Fiber Content, Density and Void Content Mechanics Fiber-Matrix Interaction in a Unidirectional Lamina Characteristics of a Fiber-Reinforced Lamina Laminated Structure Interlaminar Stresses Performance Static Mechanical Properties Fatigue Properties Impact Properties Other Properties Environmental Effects Long-Term Properties Fracture Behavior and Damage Tolerance Manufacturing Fundamentals Bag Molding Process Compression Molding Pultrusion Filament Winding Resin Transfer Molding Other Manufacturing Processes Manufacturing Processes for Thermoplastic Matrix Composites Quality Inspection Methods Design Failure Predictions Laminate Design Considerations Joint Design Design Examples Applications Examples Metal and Ceramic Matrix Composites Metal Matrix Composites Ceramic Matrix Composites Carbon-Carbon Composites Nanocomposites Nanoclay Carbon Nanofiber Carbon Nanotubes Appendices Woven Fabric Terminology Residual Stresses in Fibers and Matrix in a Lamina Due to Cooling Alternative Equations for the Elastic and Thermal Properties of a Lamina Halpin-Tsai Equations Typical Mechanical Properties of Unidirectional Continuous Fiber Composites Properties of Various SMC Composites Typical Mechanical Properties of Metal Matrix Composites Determination of Design Allowables Useful references Index

Chemical vapour deposition of coatings

Abstract: Chemical Vapour Deposition (CVD) of films and coatings involve the chemical reactions of gaseous reactants on or near the vicinity of a heated substrate surface. This atomistic deposition method can provide highly pure materials with structural control at atomic or nanometer scale level. Moreover, it can produce single layer, multilayer, composite, nanostructured, and functionally graded coating materials with well controlled dimension and unique structure at low processing temperatures. Furthermore, the unique feature of CVD over other deposition techniques such as the non-line-of-sight-deposition capability has allowed the coating of complex shape engineering components and the fabrication of nano-devices, carbon–carbon (C–C) composites, ceramic matrix composite (CMCs), free standing shape components. The versatility of CVD had led to rapid growth and it has become one of the main processing methods for the deposition of thin films and coatings for a wide range of applications, including semiconductors (e.g. Si, Ge, Si 1- x Ge x , III–V, II–VI) for microelectronics, optoelectronics, energy conversion devices; dielectrics (e.g. SiO 2 , AlN, Si 3 N 4 ) for microelectronics; refractory ceramic materials (e.g. SiC, TiN, TiB 2 , Al 2 O 3 , BN, MoSi 2 , ZrO 2 ) used for hard coatings, protection against corrosion, oxidation or as diffusion barriers; metallic films (e.g. W, Mo, Al, Au, Cu, Pt) for microelectronics and for protective coatings; fibre production (e.g. B and SiC monofilament fibres) and fibre coating. This contribution aims to provide a brief overview of CVD of films and coatings. The fundamental aspects of CVD including process principle, deposition mechanism, reaction chemistry, thermodynamics, kinetics and transport phenomena will be presented. In addition, the practical aspects of CVD such as the CVD system and apparatus used, CVD process parameters, process control techniques, range of films synthesized, characterisation and co-relationships of structures and properties will be presented. The advantages and limitations of CVD will be discussed, and its applications will be briefly reviewed. The article will also review the development of CVD technologies based on different heating methods, and the type of precursor used which has led to different variants of CVD methods including thermally activated CVD, plasma enhanced CVD, photo-assisted CVD, atomic layer epitaxy process, metalorganic assisted CVD. There are also variants such as fluidised-bed CVD developed for coating powders; electrochemical vapour deposition for depositing dense films onto porous substrates; chemical vapour infiltration for the fabrication of C-C composites and CMCs through the deposition and densification of ceramic layers onto porous fibre preforms. The emerging cost-effective CVD-based techniques such as electrostatic-aerosol assisted CVD and flame assisted CVD will be highlighted. The scientific and technological significance of these different variants of CVD will be discussed and compared with other vapour processing techniques such as Physical Vapour Deposition.

Design, preparation and properties of non-oxide CMCs for application in engines and nuclear reactors: an overview

Abstract: SiC-based ceramic matrix composites, consisting of carbon or SiC fibers embedded in a SiC-matrix, are tough ceramics when the fiber/matrix bonding is properly optimized through the use of a thin interphase. They are fabricated according to different processing routes (chemical vapor infiltration, polymer impregnation/pyrolysis, liquid silicon infiltration or slurry impregnation/hot pressing) each of them displaying advantages and drawbacks which are briefly discussed. SiC-matrix composites are highly tailorable materials in terms of fiber-type (carbon fibers of SiC-based fibers such as Si–C–O, SiC+C or quasi-stoichiometric SiC reinforcements), interphase (pyrocarbon or hexagonal BN, as well as (PyC–SiC)n or (BN–SiC)n multilayered interphases), matrix (simple SiC or matrices with improved oxidation resistance, such as self-healing matrices) and coatings (SiC or engineered multilayered coatings). The potential of SiC-matrix composites for application in advanced aerojet engines (after-burner hot section), gas turbine of electrical power/steam cogeneration (combustion chamber) and inner wall of the plasma chamber of nuclear fusion reaction, all of them corresponding to very severe conditions is discussed.

Composite Materials: Science and Engineering

Abstract: 1. Introduction.- 2. Reinforcements.- 3. Matrix Materials.- 4. Interfaces.- 5. Polymer Matrix Composites.- 6. Metal Matrix Composites.- 7. Ceramic Matrix Composites.- 8. Carbon Fiber/Carbon Matrix Composites.- 9. Multifilamentary Superconducting Composites.- 10. Micromechanics of Composites.- 11. Macromechanics of Composites.- 12. Monotonic Strength and Fracture.- 13. Fatigue and Creep.- 14. Designing with Composites.- 15. Non-Conventional Composites.

Composite materials : engineering and science

Abstract: Reinforcements and the reinforcement-matrix interface Composites with metallic matrices Ceramic matrix composites Polymer matrix composites Stiffness, strength and related topics Stiffness of unidirectional composites and laminates Micromechanics of unidirectional composites Strength of unidirectional composites and laminates Short fibre composites Fracture mechanics and toughening mechanisms Impact resistance Fatigue and environmental effects Joining Non-destructive testing.