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.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, a SiC fiber with a low oxygen content (Hi-Nicalon) was developed and produced commercially using an electron beam curing, which has a higher elastic modulus and creep resistance.
Abstract: Polymer-derived Nicalon SiC fiber produced commercially has been widely applied in high temperature Ceramic Matrix Composites (CMCs). Recently, SiC fiber with a low oxygen content (Hi-Nicalon) was developed and produced commercially using an electron beam curing. This fiber has a higher elastic modulus and creep resistance, and much higher thermal stability up to 1600 ° C than that of Nicalon fiber. High temperature mechanical properties of CMCs with Hi-Nicalon have much improved. However, creep and oxidation resistance of Hi-Nicalon CMCs are not satisfactory for high temperature structural materials, because Hi-Nicalon mainly consists of SiC micro-crystals and excess carbon. Therefore, we have developed an SiC fiber (Hi-Nicalon type S) with stoechiometric SiC composition and high crystallinity. Hi-Nicalon S fiber has high elastic modulus (420 Gpa), good oxidation resistance at 1400 °C, and excellent creep resistance. In this paper, the recent development of these oxygen free SiC fibres including physical and mechanical properties, thermal stability and an environmental resistance are reported.
41 citations
Patent•
03 Jun 1993TL;DR: In this paper, a process for producing a porous ceramic, ceramic composite or metal-ceramic composite structure by combustion synthesis is described, where a foamed polymer shape is impregnated with a slurry of ceramic precursors and ignited to initiate combustion synthesis.
Abstract: A process for producing a porous ceramic, ceramic composite or metal-ceramic composite structure by combustion synthesis wherein a foamed polymer shape is impregnated with a slurry of ceramic precursors and ignited to initiate combustion synthesis, thereby obtaining a ceramic, ceramic composite or metal-ceramic composite article having interconnected porosity. Ceramic composite filters having improved strength, toughness and thermal shock resistance are provided, with the ceramic composite being an oxide and a nonoxide.
40 citations
TL;DR: In this article, a unique combination of digital image processing, microstructure modeling, and finite element (FE)-based simulations is used to develop a methodology for modeling the micro-mechanical response of composites having non-uniform spatial arrangement of fibers.
40 citations
TL;DR: The preparation technique of the particulate composite materials in the alumina/YAG system was elaborated in this article, where the mixture of alumina and yttria particles was additionally homogenized by short attrition milling in an aqueous suspension.
Abstract: The preparation technique of the particulate composite materials in the alumina/YAG system was elaborated. Within alumina particles suspension yttria precursor was precipitated with ammonium carbonate. Drying and calcination at 600 °C resulted in the mixture of alumina and yttria particles, the latter being much finer than alumina particles. This mixture was additionally homogenized by short attrition milling in an aqueous suspension. Sintering of such powders results in the materials composed of YAG inclusions of sizes smaller than shown by alumina grains and evenly distributed within the matrix. YAG particles result from the reaction of Y 2 O 3 with Al 2 O 3 during heat treatment. YAG inclusions limit effectively grain growth of the alumina matrix. Hardness, fracture toughness, strength, Young modulus and wear susceptibility of composites and pure alumina were measured. Composites show higher hardness and in some cases higher fracture toughness and wear resistance than pure alumina polycrystals.
40 citations
TL;DR: In this paper, an ultrasonic plane wave reflected by a cylindrical fiber embedded in a homogeneous isotropic matrix is modeled, and the model calculates the back-reflection coefficient by taking in to account the properties of the fiber and the matrix, the ultrasonic wavelength, the angle of incidence, and a coefficient called "shear stiffness coefficient" which characterizes the elastic behavior between the fiber between the matrix and the fiber.
Abstract: An ultrasonic plane wave reflected by a cylindrical fiber embedded in a homogeneous isotropic matrix is modeled. The model calculates the ‘‘back‐reflection’’ coefficient by taking in to account the properties of the fiber and the matrix, the ultrasonic wavelength, the angle of incidence, and a coefficient called ‘‘shear stiffness coefficient’’ which characterizes the elastic behavior between the fiber and the matrix. Results obtained from the theoretical analysis for a model metal matrix composite system are shown. The theory developed in this paper and some of the results obtained are equally applicable in ceramic matrix fiber reinforced composites.
40 citations