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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: The microstructure analysis revealed that the improved fracture toughness could be attributed to the fiber bridging, the fiber-matrix interface debonding and the fiber pullout as mentioned in this paper.
63 citations
TL;DR: In this paper, the authors used surfactant and acid treatment to modify the CNT surface and then incorporated the functionalized CNTs into various ceramic matrices including oxide and nitride ceramics.
Abstract: The effective utilization of CNTs in composite application depends strongly on the ability to disperse CNTs homogeneously throughout the matrix and the interfacial combination is necessary for improving the CNT-based composite properties. In our work, we used surfactant and acid treatment to modify the CNTs surface and then incorporated the functionalized CNTs into various ceramic matrices including oxide and nitride ceramics. The fabrication of ceramic nanoparticle-immobilized CNTs not only improves the homogeneous distribution of CNTs in the ceramic matrices, but also makes the combination between two phases more tight. Mechanical property measurements clealy reveal obvious enhancement confirming the fabrication of true CNT-based composite materials with improved toughness properties. The addition of 0.1 wt% CNTs in the alumina increased the fracture toughness by about 1.6 times from 3.7 to 4.9 MPa.m1/2. For 1 wt% CNTs/BaTiO3composite, the toughness value (1.65 MPa.m1/2) is about 2.4 times than that of pure BaTiO3(0.68 MPa.m1/2). For 5 wt% CNTs/TiN composite, the fracture toughness is 3.81 MPa.m1/2, which is about 1.6 times than that of pure TiN ceramic whose toughness is 2.45 MPa . m1/2.
63 citations
TL;DR: In this article, carbon and SiC fiber-reinforced ceramic matrix composites were prepared via infiltration of fiber preforms using the polymer infiltration technique and polymer pyrolysis.
Abstract: Carbon and SiC fiber-reinforced ceramic matrix composites were prepared via infiltration of fiber preforms using the polymer infiltration technique and polymer pyrolysis. Suitable silazane (SiCN) precursors with appropriate thermosetting behavior, viscosity and ceramic yield were synthesized, starting from functionalized chlorosilanes. Microstructural development and fracture behavior was studied after various infiltration and pyrolysis cycles. Residual stresses induced during processing were evaluated. Mechanical and thermo-physical properties of the composites with polymer-derived matrix, i.e. 3-pt bending strength and thermal expansion coefficients (CTE), were measured dependent on reinfiltration cycles and fiber orientation. The oxidation resistance was investigated. Specific pyrolyzed samples were infiltrated via silicon melts in order to enhance corrosion and wear resistance.
63 citations
TL;DR: In this article, a pressure infiltration/carbonization combined with liquid silicon infiltration was developed for fabricating carbon fiber reinforced carbon and silicon carbide dual matrix composites (C/C-SiC) for advanced friction materials.
63 citations
TL;DR: In this paper, Zirconium diboride (ZrB 2 )-based ultra-high temperature ceramics reinforced by SiC whisker were prepared by spark plasma sintering (SPS) and conventional hot pressing (HP).
63 citations