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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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01 Jan 1990
TL;DR: In this paper, local stresses in metal-matrix composites (MMCs) subjected to thermal and mechanical loads, the computational simulation of high-temperature MMCs' cyclic behavior, and a plasticity analysis of fibrous composite laminates under thermomechanical loads are discussed.
Abstract: The present conference discusses local stresses in metal-matrix composites (MMCs) subjected to thermal and mechanical loads, the computational simulation of high-temperature MMCs' cyclic behavior, an analysis of a ceramic-matrix composite (CMC) flexure specimen, and a plasticity analysis of fibrous composite laminates under thermomechanical loads. Also discussed are a comparison of methods for determining the fiber-matrix interface frictional stresses of CMCs, the monotonic and cyclic behavior of an SiC/calcium aluminosilicate CMC, the mechanical and thermal properties of an SiC particle-reinforced Al alloy MMC, the temperature-dependent tensile and shear response of a graphite-reinforced 6061 Al-alloy MMC, the fiber/matrix interface bonding strength of MMCs, and fatigue crack growth in an Al2O3 short fiber-reinforced Al-2Mg matrix MMC.

50 citations

Journal ArticleDOI
TL;DR: In this article, polymeric and oligomeric carbosilanes having Si atoms linked by methylene (CH2 ) groups were used to prepare nano-sized tubules and bamboo-like SiC structures by both CVD and liquid precursor infiltration and pyrolysis inside of nanoporous alumina filter disks, followed by dissolution of the alumina template in HF(aq).
Abstract: Polymeric and oligomeric carbosilanes having Si atoms linked by methylene ( CH2 ) groups were used to prepare nano-sized tubules and bamboo-like SiC structures by both CVD and liquid precursor infiltration and pyrolysis inside of nanoporous alumina filter disks, followed by dissolution of the alumina template in HF(aq). These initially amorphous SiC structures were characterized by SEM, EMPA, TEM, and XRD. Typical outer diameters of the SiC nanotubes (NTs) were 200–300 nm with 20–40 nm wall thicknesses and lengths up to the thickness of the original alumina templates, ca. 60 μm. In the case of the CVD-derived SiC NTs, annealing these structures up to 1600 °C in an Ar atmosphere yielded a nanocrystalline β-SiC or β-SiC/C composite in the shape of the original NTs, while in the case of the liquid precursor-derived nanostructures, conversion to a collection of single crystal SiC nanofibers and other small particles was observed.

50 citations

Patent
30 Sep 1996
TL;DR: In this article, high temperature ablation resistant ceramic composites have been made, which are composites of mixed diborides and/or carbides of zirconium and hafnium, along with silicon carbide.
Abstract: High temperature ablation resistant ceramic composites have been made. These ceramics are composites of zirconium diboride and zirconium carbide with silicon carbide, hafnium diboride and hafnium carbide with silicon carbide and ceramic composites which contain mixed diborides and/or carbides of zirconium and hafnium, along with silicon carbide.

50 citations

Journal ArticleDOI
TL;DR: In this article, a crack growth mechanism map for SiC/SiC composites has been developed for chemical and nuclear environments as a function of temperature and time, which is an effective tool for identifying operating regimes and predicting behavior.
Abstract: Ceramic matrix composites have the potential to operate at high temperatures and are, therefore being considered for a variety of advanced energy technologies such as combustor liners in land-based gas turbo/generators, heat exchangers and advanced fission and fusion reactors. Ceramic matrix composites exhibit a range of crack growth mechanisms driven by a range of environmental and nuclear conditions. The crack growth mechanisms include: (1) fiber relaxation by thermal (FR) and irradiation (FIR) processes, (2) fiber stress-rupture (SR), (3) interface removal (IR) by oxidation, and (4) oxidation embrittlement (OE) resulting from glass formation including effects of glass viscosity. Analysis of these crack growth processes has been accomplished with a combination experimental/modeling effort. Dynamic, high-temperature, in situ crack growth measurements have been made in variable Ar + O 2 environments while a Pacific Northwest National Laboratory (PNNL) developed model has been used to extrapolate this data and to add radiation effects. In addition to the modeling effort, a map showing these mechanisms as a function of environmental parameters was developed. This mechanism map is an effective tool for identifying operating regimes and predicting behavior. The process used to develop the crack growth mechanism map was to: (1) hypothesize and experimentally verify the operative mechanisms, (2) develop an analytical model for each mechanism, and (3) define the operating regime and boundary conditions for each mechanism. A map for SiC/SiC composites has been developed for chemical and nuclear environments as a function of temperature and time.

50 citations

Patent
14 Jul 1980
TL;DR: A sintered ceramic body of high toughness, consisting of an isotropic ceramic matrix (e.g. Al 2 O 3 ) and at least one therein-dispersed phase (ZrO 2, HzO 2 ) formed from a powder consisting of particles having an average diameter from 0.3 to 1.25 μm, wherein the ceramic embedment material is present in different enantiotropic solid modifications at the firing temperature of the ceramic body, whose densities are substantially different, is shot through with extremely fine microfractures in high density RE
Abstract: A sintered ceramic body of high toughness, consisting of an isotropic ceramic matrix (e.g. Al 2 O 3 ) and at least one therein-dispersed phase (ZrO 2 , HzO 2 ) of ceramic embedment material formed from a powder consisting of particles having an average diameter from 0.3 to 1.25 μm, wherein the ceramic embedment material is present in different enantiotropic solid modifications at the firing temperature of the ceramic body and below the firing temperature, whose densities are substantially different, and the ceramic body is shot through with extremely fine microfractures in high density.

50 citations


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