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, the reduction of graphene oxide (GO) during spark plasma sintering (SPS) of the GO/Si 3 N 4 composites was studied by X-ray photoelectron and micro-Raman spectroscopy.
77 citations
TL;DR: In this article, the effects of pyrolytic carbon (PyC) interface thickness between fibers and matrix on density, microstructural evolution and mechanical properties were characterized. And they showed that induced PyC interface conditions strongly affect the density and therefore dominate mechanical properties and fracture behaviors.
76 citations
TL;DR: A ceramic matrix having a high degree of surface area per unit volume is shown to have significant utility in the large scale culture of animal cells.
Abstract: A ceramic matrix having a high degree of surface area per unit volume is shown to have significant utility in the large scale culture of animal cells. The surfaces of the ceramic provide for the adhesion and growth of a wide variety of cells to densities equal to or greater than obtained with other methods such as roller bottles or microcarriers. Utilizing an automated system controlling pH and dissolved oxygen, scale-up from 0.9 m2 to 18.5 m2 of surface area was accomplished with no losses in efficiency of surface utilization. The density of Vero cells after 7–8 days culture under standard conditions averaged 6.6 × 105 cells/cm2 for each size of ceramic. Methods providing continuous monitoring of the culture through analysis of the cellular oxygen consumption rate and complete cell harvesting are described.
76 citations
TL;DR: In this article, the authors reviewed the preparation processes, general microstructures, mechanical, chemical, electrical and optical properties, and potential applications of Si-B-C-N ceramic, as well as its matrix composites.
Abstract: In the past twenty years, Si-B-C-N ceramic has attracted wide attention due to its special structure and outstanding properties. The ceramic generally has an amorphous or a nano-crystalline structure, and has excellent structural stability, oxidation resistance, creep resistance and high-temperature mechanical properties, etc. Thus, Si-B-C-N ceramic attracts many researchers and finds potential applications in transportation, aerocraft, energy, information, microelectronics and environment, etc. Much work has been carried out on its raw materials, preparation processes, structural evolution, phase equilibrium and high-temperature properties. In recent years, many researchers focus on its new preparation methods, the preparation of dense ceramic sample with large dimensions, ceramic matrix composites reinforced by carbon fiber or SiC whisker, or components with various applications. Research on Si-B-C-N ceramic will develop our insight into the relationship between structures and properties of ceramics, and will be helpful to the development of novel high-performance ceramics. This paper reviews the preparation processes, general microstructures, mechanical, chemical, electrical and optical properties, and potential applications of Si-B-C-N ceramic, as well as its matrix composites.
76 citations
TL;DR: In this paper, the evolution of the current density and temperature distribution in the punch-die sample set-up during FAST of ZrO2-TiN powder mixtures was modeled by finite element calculations supported by in situ measured electrical and thermal input data.
Abstract: In order to reveal the fundamentals of the field assisted sintering technique (FAST), also known as spark plasma sintering (SPS), the evolution of the current density and temperature distribution in the punch-die-sample set-up during FAST of ZrO2–TiN powder mixtures was modeled by finite element calculations supported by in situ measured electrical and thermal input data. The thermal and electrical properties of partially sintered composite powder compacts were estimated using theoretical mixture rules, allowing to calculate the current density and temperature distribution inside the tool and the specimen during the FAST sintering process. The electrical properties of the sintering composite powder compact, and hence the thermal distribution in the sinter set-up, changed drastically during densification once percolation occurred. Based on the calculated thermal distribution inside the composite powder compact, an optimal tool-powder compact design was determined in order to process electrically conductive ZrO2–TiN composites from electrical insulating powder compacts within minutes with high reproducibility.
76 citations