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 paper, a Si3N4-graphene composites were manufactured using the hot-pressing method, where the graphene phase was added to the silicon nitride phase in a quantity of up to 10 mass%, and the materials were sintered under uniaxial pressure.
Abstract: This study concerns new Si3N4–graphene composites manufactured using the hot-pressing method. Because of future applications of silicon nitride for cutting tools or specific parts of various devices having contact with high temperatures there is a need to find a ceramic composite material with good mechanical and especially thermal properties. Excellent thermal properties in the major directions are characteristic of graphene. In this study, the graphene phase is added to the silicon nitride phase in a quantity of up to 10 mass%, and the materials are sintered under uniaxial pressure. The mixture of AlN and Y2O3 is added as sintering activator to the composite matrix. The studies focus on thermal stability of produced composites in argon and air conditions up to the temperature of 1,000 °C. The research also concerns the influence of applied uniaxial pressure during the sintering process on the orientation of graphene nanoparticles in the Si3N4 matrix. The study also presents research on anisotropy of thermal diffusivity and following thermal conductivity of ceramic matrix composites versus the increasing graphene quantity. Most of the presented results have not been published in the literature yet.
55 citations
Patent•
24 Feb 1986TL;DR: In this paper, a method of preparing a monolithic catalyst support having an integrated high surface area phase is provided, where a plasticized batch of ceramic matrix material intimately mixed with high-surface area powder is formed into the desired shape for the monolith and then heated to sinter the ceramic.
Abstract: A method of preparing a monolithic catalyst support having an integrated high surface area phase is provided. A plasticized batch of ceramic matrix material intimately mixed with high surface area powder is formed into the desired shape for the monolith and then heated to sinter the ceramic. The resulting monolith has a strong substrate of the ceramic matrix material and a high surface area phase provided by the high surface area powder extruded with the batch.
55 citations
TL;DR: In this article, a high density 3D-four directional carbon/carbon composite was fabricated by hot isostatic pressure impregnation carbonisation using coal tar pitches, and the properties of the composite were determined.
55 citations
TL;DR: In this paper, a 3D-linked carbon fiber-carbon nanotube (C f -CNT) hybrid structure is presented to improve the through-thickness thermal properties of polymer derived silicon carbonitride matrix composites.
55 citations
TL;DR: In this paper, a new alumina-ceria composite cutting tool is developed by adding ceria to the alumina matrix, which shows improvement in the mechanical properties such as hardness and fracture toughness than the pure alumina ceramic cutting tool.
Abstract: Ceramic cutting tool technology is advancing rapidly and new ceramic composite cutting tools are developed by improving their mechanical properties. In the present work, a new alumina ceramic composite cutting tool is developed by adding ceria to the alumina matrix. The alumina–ceria ceramic composite cutting tool insert shows improvement in the mechanical properties such as hardness and fracture toughness than the pure alumina ceramic cutting tool insert. Machining studies have been conducted using the newly developed alumina–ceria insert on grey cast iron workpiece. The machining performance is compared with the pure alumina insert and a commercial zirconia toughened alumina (ZTA) insert. The machining performance of the alumina–ceria insert is better than the pure alumina insert and is comparable with the commercial ZTA insert.
55 citations