Topic
Ceramic matrix composite
About: Ceramic matrix composite is a research topic. Over the lifetime, 7807 publications have been published within this topic receiving 117020 citations.
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TL;DR: In this paper, Sialon-Si3N4 graded nano-composite ceramic materials were fabricated by hot-pressing and the friction coefficient and the wear rate were measured.
34 citations
TL;DR: In this article, a new class of thermal hyperconductive materials based on continuous carbon fibres has been developed, and the best composite measured presents a thermal conductivity value as high as 245 Wm−1K−1 with specific thermal conductivities higher than that of aluminium or copper.
34 citations
TL;DR: In this article, a microstructural geometric unit cell model of a fiber-reinforced ceramic matrix composite material (C/C-SiC) was developed from optical micrographs and which incorporates fiber tows, matrix and interface materials.
Abstract: A new experimental test rig has been used to measure the thermal diffusivity of a fibre-reinforced ceramic matrix composite material (C/C-SiC) using laser pulse heating under conditions of both one-dimensional and three-dimensional heat transfer. To predict these measurements, a microstructural geometric unit cell model of the material has been developed from optical micrographs and which incorporates fibre tows, matrix and interface materials. With the selection of a suitable finite-element mesh to model each material phase and the prescription of appropriate boundary conditions, this model has then been analysed for conditions of steady-state and transient heat conduction. In this way macro-thermal properties have been calculated from the micro-thermal properties of each phase of the composite. The micro-thermal properties deduced from the analyses for these thermal conditions are in close mutual agreement, and within the bounds of numerical error. These results are presented in this paper alongside the experimental measurements. It is concluded that with careful geometric modelling and sensible property data selection, the micro-thermal properties obtained from the unit cell model can accurately predict the experimentally measured macro-thermal properties.
34 citations
TL;DR: In this article, the authors investigated the tribological properties of Cf/SiC composite with different fiber orientations and ZrO2 with ground and polished surfaces, running-in tests under dry condition were conducted in a pin-to-disc apparatus.
34 citations
TL;DR: In this paper, the problem of car parking is modeled as a car parking problem, where hard rods are distributed randomly along a one-dimensional line, but with a stress-dependent rod length.
Abstract: The fiber fragment distribution obtained from tensile testing of a single‐filament composite contains vital information on the in situ strength of the fiber at short gauge lengths and on the shear stress across the fiber/matrix interface. Here, this fragmentation problem is mapped onto the problem of hard rods distributed randomly along a one‐dimensional line, but with a stress‐dependent rod length, and is then solved exactly. The solution utilizes the ‘‘car‐parking’’ problem of equal sized cars parked along a line and the theory predictions agree well with existing simulation results. The theory also applies to multiple cracking of brittle films on pliable substrates, film coatings on fibers, and matrix cracking in ceramic matrix composites, and now allows the in situ fiber or film statistical strength and interfacial shear strength to be derived from experimental fragment distributions.
34 citations