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.
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TL;DR: In this article, the authors investigated delamination crack propagation in a laminated fiber-reinforced ceramic-matrix composite and found that the crack growth initiation resistance is dominated by the critical strain energy release rate for the matrix.
Abstract: Delamination crack propagation has been investigated in a laminated fiber-reinforced ceramic-matrix composite. The crack growth initiation resistance has been shown to be dominated by the critical strain energy release rate for the matrix. However, the resistance increases with crack extension because of bridging effects associated with intact fibers and, in some cases, intact segments of matrix. The delamination cracks also assume a steady-state trajectory within a 0° layer close to the 0°/90° interface.
39 citations
TL;DR: In this paper, the authors demonstrate that the high-temperature thermal conductivity of dense β-Yb2Si2O7 pyrosilicate ceramic can be reduced progressively in β-(Y 0.1Yb0.9)2Si 2O7 and β −Y0.5Yb 0.5
39 citations
TL;DR: In this article, a model for predicting the fracture energy of ceramic-matrix composites containing dispersed metallic fibres is presented, and it is assumed that the work of fracture comes entirely from pull-out and/or plastic deformation of fibres bridging the crack plane.
39 citations
Patent•
19 Jun 1984TL;DR: A surface-coated Sialon-base ceramic material for tools has its surface coated with a hard layer, and exhibits very excellent wear resistance when used in cutting tools and other wear resisting tools.
Abstract: A surface coated Sialon-base ceramic material for tools has its surface coated with a hard layer, and exhibits very excellent wear resistance when used in cutting tools and other wear resisting tools. The surface coated Sialon-base ceramic material comprises: a Sialon-base ceramic matrix and at least one hard coating layer formed over the surface of the above matrix, which consists essentially of at least one selected from the group consisting of carbide of Ti, Zr, or Hf, nitride thereof, carbo-nitride thereof, carbo-oxide thereof, and carbo-nitro-oxide thereof, preferably having a mean thickness within a range from 0.5 to 10 μm. The above surface coated Sialon-base ceramic material for tools may further include at least one second hard coating layer formed on a surface of the above first-mentioned hard coating layer, which consists essentially of at least one selected from the group consisting of oxide of Al and nitro-oxide thereof, wherein the first-mentioned hard coating layer exists as an intermediate layer whereas the second hard coating layer exists as a surface layer. Preferably, the second hard coating layer has a mean thickness within a range from 0.5 to 5 μm.
39 citations
TL;DR: In this article, a new porous composite "coating" for reusable surface insulation (RSI) materials used on the space shuttle has been described, which has improved impact resistance while maintaining optical and thermal properties comparable to the previously available reaction-cured glass coating.
Abstract: The need for improved coatings on low-density reusable surface insulation (RSI) materials used on the space shuttle has stimulated research into developing tougher coatings The processing of a new porous composite "coating" for RST called toughened unipiece fibrous insulation Is discussed Characteristics including performance in a simulated high-speed atmospheric entry, morphological structure before and after this exposure, resistance to Impact, and thermal response to a typical heat pulse are described It is shown that this coating has improved impact resistance while maintaining optical and thermal properties comparable to the previously available reaction-cured glass coating
39 citations