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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.


Papers
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Journal ArticleDOI
TL;DR: Al 2 O 3 /(W,Ti) composite ceramic materials reinforced by rare earth additives have been fabricated by the hot pressing technique as discussed by the authors, where the authors analyzed the structure, flexural strength, toughening and strengthening mechanisms.

33 citations

DOI
01 Mar 2019
TL;DR: In this article, the effects of aluminum nitride additive on the densification behavior and microstructure development of titanium diboride (TiB2) based ceramic matrix composite were investigated.
Abstract: In this research study, the effects of aluminum nitride (AlN) additive on the densification behavior and microstructure development of titanium diboride (TiB2) based ceramic matrix composite were investigated. In this way, a monolithic TiB2 ceramic and a TiB2–5 wt% AlN ultrahigh temperature ceramic composite were fabricated by spark plasma sintering (SPS) process at a temperature of 1900 °C for a dwell time of 7 min under an externally applied pressure of 40 MPa in vacuum conditions. The relative density measurements were carried out using the Archimedes principles for evaluation of bulk density and rule of mixtures for calculation of theoretical one. Compared to the additive-free monolithic TiB2 ceramic sample with a relative density of ~96%, the addition of AlN as a sintering aid greatly improved the sinterability of TiB2 matrix composite so that a near fully dense sample with a relative density of ~100% were obtained by the spark plasma sintering process. The removal of harmful oxide impurities of titania (TiO2) and boria (B2O3) from the surfaces of starting TiB2 powder particles and in-situ formation of new phases such as aluminum diboride (AlB2) and Al2Ti as an intermetallic compound of aluminum and titanium, not only improved the sinterability of the composite ceramic, but also significantly prevented the extreme growth of TiB2 grains.

33 citations

Journal ArticleDOI
TL;DR: In this article, a review of the importance and growing body of research on fiber-matrix interfaces as they relate to composite toughening mechanisms is presented, and micropillar compression is explored experimentally as a high-fidelity method for extracting interface properties compared with traditional fiber push-out testing.
Abstract: Ceramic fiber-matrix composites (CFMCs) are exciting materials for engineering applications in extreme environments. By integrating ceramic fibers within a ceramic matrix, CFMCs allow an intrinsically brittle material to exhibit sufficient structural toughness for use in gas turbines and nuclear reactors. Chemical stability under high temperature and irradiation coupled with high specific strength make these materials unique and increasingly popular in extreme settings. This paper first offers a review of the importance and growing body of research on fiber-matrix interfaces as they relate to composite toughening mechanisms. Second, micropillar compression is explored experimentally as a high-fidelity method for extracting interface properties compared with traditional fiber push-out testing. Three significant interface properties that govern composite toughening were extracted. For a 50-nm-pyrolytic carbon interface, the following were observed: a fracture energy release rate of ∼2.5 J/m2, an internal friction coefficient of 0.25 ± 0.04, and a debond shear strength of 266 ± 24 MPa. This research supports micromechanical evaluations as a unique bridge between theoretical physics models for microcrack propagation and empirically driven finite element models for bulk CFMCs.

33 citations

Patent
11 Nov 2002
TL;DR: In this paper, a flexible insulation blanket having a ceramic matrix composite (CMC) outer layer was constructed by infiltrating ceramic material within the outer ceramic fabric layer of the flexible blanket and curing the ceramic material to form a CMC layer.
Abstract: A flexible insulation blanket having a ceramic matrix composite (CMC) outer layer, and a method of producing a flexible insulation blanket having a smooth, aerodynamically suitable, outer surface by infiltrating ceramic material within the outer ceramic fabric layer of the flexible insulation blanket and curing the ceramic material to form a CMC layer. The CMC layer is cured while the blanket is under compression such that the resulting CMC layer has a smooth surface.

33 citations

Journal ArticleDOI
TL;DR: In this article, the degree of interfacial coupling/adhesion between a diamond matrix and a carbon nanotube is captured through interstitial carbon atoms located in the interface, which can form bonds with both the matrix and CNT atoms.

33 citations


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