Composite materials may be restricted to emphasize those materials that contain a continuous matrix constituent that binds together and provides form to an array of a stronger, stiffer reinforcement constituent. The resulting composite material has a balance of structural properties that is superior to either constituent material alone. Combining the advantages of inorganic and organic componen...

The complex damage mechanisms that accumulate within SiCf/SiC ceramic matrix composites (CMCs) subject to thermal and mechanical stress are being investigated in anticipation of the material’s introduction into high performance gas turbine engines. Acoustic emission (AE) is recognised as a leading non-destructive evaluation (NDE) tool this end, was used study determine so-called cracking onset ...

Ceramic matrix composites (CMC’s), particularly silicon carbide (SiC) fiber-reinforced SiC-matrix (SiC/SiC) composites, have been studied for advanced nuclear energy applications for more than a decade. The perceived potentials for advanced SiC/SiC composites include the ability to operate at temperature regimes much higher than heat-resistant alloys, the inherent low inducedactivation nuclear ...

SiC fiber-reinforced ceramic matrix composites (SiCf/SiC CMCs) are being increasingly used in the hot sections of gas turbines because their light weight and mechanical properties at high temperatures. The objective this investigation was development a thermal/environmental barrier coating (T/EBC) composite system consisting an environmental (EBC) to protect from chemical attack thermal (TBC) t...

Abstract Environmental barrier coatings (EBCs) effectively protect the ceramic matrix composites (CMCs) from harsh engine environments, especially steam and molten salts. However, open pores inevitably formed during deposition process provide transport channels for oxidants corrosives, lead to premature failure of EBCs. This research work proposed a method pressure infiltration densification wh...

High temperature applications of ceramic matrix composites (CMCs) necessitate a rigorous understanding of the fracture and damage mechanisms that occur under thermo-mechanical loading, requiring the development of advanced small-scale characterization approaches. In this work, fiber-reinforced SiC/SiC tensile specimens were loaded in a scanning electron microscope (SEM) at 800°C, and full-field...

We report here the modification of multiwalled carbon nanotubes (MWNTs) with a kind of polysaccharide, carboxymethylated chitosan (cmCs), and their potential usage as donor-acceptor nanohybrids. The modified composites (cmCs/MWNTs) were characterized by high-resolution TEM, FT-IR, TGA and time-resolved spectroscopy. The time-resolved spectroscopic experiments revealed that interfacial electron ...

Composites of lead zirconate titanate particles in an epoxy matrix are prepared in the form of 0-3 and quasi 1-3 with different ceramic volume contents from 10% to 50%. Two different processing routes are tested. Firstly a conventional dielectrophoretic structuring is used to induce a chain-like particle configuration, followed by curing the matrix and poling at a high temperature and under a h...