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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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Journal ArticleDOI
TL;DR: In this paper, structural ceramic nanocomposites are reviewed with emphasis on the Al 2 O 3 SiC and Si 3 N 4 SiC systems, and it is shown that the strength increase can best be related to a reduction in processing defect size.
Abstract: Structural ceramic nanocomposites are reviewed with emphasis on the Al 2 O 3 SiC and Si 3 N 4 SiC systems. The incorporation of a nanosized second phase, such as SiC, into a ceramic matrix can lead to an improvement in mechanical properties. It is still unclear, however, whether those improvements can directly be related to an intrinsic ‘nanocompossite effect’ or to other factors. This review is divided into three parts. First, basic processing routes for nanocomposites, namely conventional powder processing, sol-gel processing and polymer pyrolysis are presented in detail. Second, the mechanical properties of different nanocomposites are compared. Finally, models which attempt to explain the improvements in these properties are explored. It will be shown that the strength increase can best be related to a reduction in processing defect size. For applications the most interesting properties of nanocomposites are their wear, creep and high temperature performance.

432 citations

Journal ArticleDOI
TL;DR: It is argued that the highly shear-deformable SWNTs or graphite heterogeneities in the Composites help redistribute the stress field under indentation, imparting the composites with contact-damage resistance.
Abstract: There has been growing interest in incorporating single-wall carbon nanotubes (SWNTs) as toughening agents in brittle ceramics. Here we have prepared dense Al2O3/SWNT composites using the spark-plasma sintering (SPS) method. Vickers (sharp) and Hertzian (blunt) indentation tests reveal that these composites are highly contact-damage resistant, as shown by the lack of crack formation. However, direct toughness measurements, using the single-edge V-notch beam method, show that these composites are as brittle as dense Al2O3 (having a toughness of 3.22 MPa m0.5). This type of unusual mechanical behaviour was also observed in SPS-processed, dense Al2O3/graphite composites. We argue that the highly shear-deformable SWNTs or graphite heterogeneities in the composites help redistribute the stress field under indentation, imparting the composites with contact-damage resistance. These composites may find use in engineering and biomedical applications where contact loading is important.

418 citations

Journal ArticleDOI
04 Sep 1997-Nature
TL;DR: In this article, the authors describe a strong ceramic composite with a different kind of microstructure, made by unidirectional solidification of an Al 2 O 3 / GdAlO 3 eutectic mixture.
Abstract: Monolithic ceramics are not widely used as structural materials because of their brittleness. Ceramic matrix composites, in which whiskers 1-3 or fibres 4-7 of strong ceramics such as silicon carbide or silicon nitride are embedded in a ceramic matrix, offer improved toughness and strength because the energy of cracks may be dissipated at the whisker/matrik interface. Here we describe a strong ceramic composite with a different kind of microstructure, made by unidirectional solidification of an Al 2 O 3 / GdAlO 3 eutectic mixture. This composite has a microstructure in which continuous networks of single-crystal Al 2 O 3 and single-crystal GdAlO 3 interpenetrate without grain boundaries. Rather than brittle fracture, the material displays plastic deformation at 1,873K owing to dislocation motion, as in metals. The high strength and resistance to brittle failure of this material at such high temperatures augurs well for applications in mechanical engineering.

412 citations

Journal ArticleDOI
TL;DR: In this article, an original catalytic method that produces ceramic-matrix composite powders that contain in situ grown nanotubes is described, and the synthesis parameters that favour the obtention of very high quantities of carbon-nanotubes are discussed.

403 citations

BookDOI
19 Mar 1997
TL;DR: In this paper, the authors define fibres, fabrics and fillers matrix resins and fibre/matrix adhesion as constituents of composite materials and apply them in a variety of applications.
Abstract: Introduction - definitions, classifications and applications. Part 1 Constituents: fibres, fabrics and fillers matrix resins and fibre/matrix adhesion. Part 2 Mechanics: micromechanics mechanics of laminated structures mechanics of woven fabric composites fracture and damage mechanics in laminated composites. Part 3 Processing: processing for laminated structures press moulding processes filament winding the pultrusion process for continuous automated manufacture of engineered composite profiles processing of thermoplastic matrix composites processing of particle-reinforced metal matrix composites joining and repair of aircraft composite structures machining of composite materials. Part 4 Properties and performance: laminated polymer matrix composites random fibre composites selection guidelines for metal matrix composites ceramic matrix composites cement matrix composites. Part 5 Testing: mechanical property measurements nondestructive tests. Part 6 Engineering with composite materials: design methodology and practices materials selection, preliminary design and sizing for composite laminates design guidelines for laminated composites.

385 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202394
2022236
2021300
2020344
2019433
2018354