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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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TL;DR: In this paper, the pyrolysis of a highly metallized polymer precursor comprised of a polyferrocenylsilane with pendant cobalt clusters under a reductive atmosphere (N2/H2 = 92%/8%) leading to CoFe magnetic alloy nanoparticle-containing ceramic thin films.
Abstract: We describe the pyrolysis of a highly metallized polymer precursor comprised of a polyferrocenylsilane with pendant cobalt clusters under a reductive atmosphere (N2/H2 = 92%/8%) leading to CoFe magnetic alloy nanoparticle-containing ceramic thin films. Variation of the pyrolysis conditions leads to changes in the nanoparticle size, size distribution, and composition, as well as the ceramic film structure, all of which influence the magnetic properties of the material. When pyrolyzed at 500 °C, the nucleation and growth afford uniform size, larger CoFe nanoparticles on the film surface, and smaller nanoparticles in the underlying layer of the ceramic films. We found that the SiC/C ceramic matrix prevents oxidation of fully embedded nanoparticles, whereas the surface nanoparticles are oxidized on exposure to air. The nanoparticle-containing films are superparamagnetic when pyrolyzed at 600 °C and are ferromagnetic at higher pyrolysis temperatures. The CoFe nanoparticle-containing ceramic thin films have bee...
55 citations
TL;DR: In this article, the influence of geometrical parameters such as thickness, number of layers and tension/compression thickness ratio on the apparent R -curve was analyzed for different multilayers.
Abstract: During the processing of laminar ceramics, biaxial residual stresses can arise due to the thermal mismatch between different layers. For ceramic multilayers, the beneficial consequences of compressive stresses at the surface are well known: increase in strength, apparent toughness and reliability. Nevertheless, the resulting tensile stresses may induce a negative influence in the effective fracture toughness if the tensile stresses are high. The weight function technique is used to assess the stress intensity factor corresponding to the residual stresses field. The influence of geometrical parameters such as thickness, number of layers and tension/compression thickness ratio is analyzed. For different multilayers (Al 2 O 3 − x Al 2 O 3 /(1 − x )ZrO 2 ), effective R -curves are presented. The existence of an optimal architecture that maximizes the toughening is exposed as well as two tendencies on the apparent R -curve that define different fracture patterns: brittle failure or layer-by-layer fracture.
55 citations
TL;DR: In this paper, non-planar morphologies observed in the reaction front of carbon fibers or interphases receding into a ceramic matrix have been analyzed and the implications of nonplanar morphology development in receding carbon constituents with respect to ceramic matrix composites are evaluated.
55 citations
Book•
01 Jan 2014
TL;DR: In this article, the authors present an overview of the development of ceramic matrix composites and their application in various types and applications, including hot-pressing and hot-isostatic pressing.
Abstract: Advances in ceramic matrix composites: Introduction. Part 1 Types and processing: Processing, properties and applications of ceramic matrix composites, SiCf/SiC: An overview Nanoceramic matrix composites: Types, processing and applications Silicon carbide-containing alumina nanocomposites: Processing and properties Advances in manufacture of ceramic matrix composites by infiltration techniques Manufacture of graded ceramic matrix composites using infiltration techniques Heat treatments to strengthen silicon carbide ceramic matrix composites Developments in hot-pressing (HP) and hot isostatic pressing (HIP) of ceramic matrix composites Hot pressing of tungsten carbide ceramic matrix composites Strengthening of alumina ceramic matrix nanocomposites using spark plasma sintering Cold ceramics: Low-temperature processing of ceramics for applications in composites. Part 2 Properties: Understanding interfaces and mechanical properties of ceramic matrix composites Using finite element analysis (FEA) to understand the mechanical properties of ceramic matrix composites Understanding wear and tribological properties of ceramic matrix composites Understanding and improving the thermal stability of layered ternary carbides in ceramic matrix composites Advances in self-healing ceramic matrix composites Self crack-healing behaviour in ceramic matrix composites. Part 3 Applications: Geopolymer (aluminosilicate) composites: Synthesis, properties and applications Fibre-reinforced geopolymer composites (FRGC) for structural applications The use of ceramic matrix composites in nuclear and fusion energy applications Ceramic matrix composite thermal barrier coatings for turbine parts The use of ceramic matrix composites for metal cutting applications Cubic boron nitride-containing ceramic matrix composites for cutting tools Multilayer glass-ceramic composites for microelectronics: Processing and properties Fabricating functionally-graded ceramic micro-components using soft lithography Ceramics in restorative dentistry Resin-based ceramic matrix composite materials in dentistry The use of nano-boron nitride reinforcements in composites for packaging applications.
55 citations