Study of Silicon Carbide Ceramics

2009 ◽  
Vol 1181 ◽  
Author(s):  
Malek Amir Abunaemeh ◽  
Ibidapo Ojo ◽  
Mohamed Seif ◽  
Claudiu Muntele ◽  
Daryush Ila
Keyword(s):  
Silicon Carbide ◽  
Photoelectron Spectroscopy ◽  
Uranium Oxide ◽  
Nuclear Reactor ◽  
X Ray ◽  
Triso Fuel ◽  
Carbide Ceramics ◽  
Silicon Carbide Ceramics ◽  
Very High

AbstractThe TRISO fuel that is intended to be used for the generation IV nuclear reactor design consists of a fuel kernel of Uranium Oxide (UOx) coated in several layers of materials with different functions. One consideration for some of these layers is Silicon Carbide (SiC) [1]. The design, manufacture and fabrication of SiC are done at the Center for Irradiation of Materials (CIM). This light weight material can maintain dimensional and chemical stability in adverse environments and very high temperatures. The characterization of the elemental makeup of the SiC material used is done using X-ray photoelectron spectroscopy (XPS). Nano-indentation is used to determine the hardness, stiffness and Young's Modulus of the material. Raman Spectroscopy is used to characterize the chemical bonding for different sample preparation temperatures.

Characterization of Changes in Properties and Microstructure of Glassy Polymeric Carbon Following Au Ion Irradiation

2009 ◽  
Vol 1215 ◽  
Author(s):  
Malek Amir Abunaemeh ◽  
Mohamed Seif ◽  
Young Yang ◽  
Lumin Wang ◽  
Yanbin Chen ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Nuclear Reactor ◽  
Ion Irradiation ◽  
Pyrolytic Carbon ◽  
X Ray ◽  
Triso Fuel ◽  
Transmission Electron ◽  
Displacement Per Atom ◽  
Polymeric Carbon

AbstractThe TRISO fuel has been used in some of the Generation IV nuclear reactor designs [1,2]. It consists of a fuel kernel of UOx coated with several layers of materials with different functions. Pyrolytic carbon (PyC) is one of the materials in the layers. In this study we investigate the possibility of using Glassy Polymeric Carbon (GPC) as an alternative to PyC. In this work, we are comparing the changes in physical and microstructure properties of GPC after exposure to irradiation fluence of 5 MeV Au equivalent to a 1 displacement per atom (dpa) at samples prepared at 1000, 1500 and 2000°C. The GPC material is manufactured and tested at the Center for Irradiation Materials (CIM) at Alabama A&M University. Transmission electron microscopy (TEM), Rutherford backscattering spectroscopy (RBS), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy were used for the analysis.

Characterization of silicon carbide ceramics obtained from porous carbon structure achieved by plant carbonization

2020 ◽  
Vol 245 ◽  
pp. 122768 ◽  
Author(s):  
Vladimir Dodevski ◽  
Maja C. Pagnacco ◽  
Ivana Radović ◽  
Milena Rosić ◽  
Bojan Janković ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Porous Carbon ◽  
Carbon Structure ◽  
Carbide Ceramics ◽  
Silicon Carbide Ceramics

Processing and Characterization of Nano Silicon Carbide Ceramics via Precursor Pyrolysis

2010 ◽  
Vol 434-435 ◽  
pp. 162-164
Author(s):  
Dong Lin Zhao ◽  
Lei Zhang ◽  
Zeng Min Shen
Keyword(s):  
Silicon Carbide ◽  
Nitrogen Atmosphere ◽  
Cross Linking ◽  
Mass Ratio ◽  
Ceramic Yield ◽  
Sic Ceramic ◽  
Nano Silicon ◽  
Carbide Ceramics ◽  
Silicon Carbide Ceramics

Nano silicon carbide ceramics were prepared via precursor pyrolysis. Polycarbosilane (PCS) and divinylbenzene (DVB) were selected as a precursor to silicon carbide ceramics and a cross-linking reagent for PCS, respectively. The cross-linking properties and pyrolysis of PCS and DVB were investigated by changing the mass ratios of PCS/DVB. The mass ratio of PCS/DVB has a great effect on silicon carbide ceramic yield. The cured PCS/DVB with a mass ratio of 1:0.5 has the highest SiC ceramic yield (63.1%) at the temperature up to 1500 °C and its pyrolyzates consiste of nano silicon carbide with a diameter of 10-40 nm. The microstructures of the nano silicon carbide ceramics were characterized by SEM and XRD. The pyrolysis behavior of the cured PCS/DVB was characterized by thermogravimetry in nitrogen atmosphere.

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