Processing and Characterization of Nano Silicon Carbide Ceramics via Precursor Pyrolysis

Dong Lin Zhao; Lei Zhang; Zeng Min Shen

doi:10.4028/www.scientific.net/KEM.434-435.162

Paper Titles

Liquid Oxide Flow during Oxidation of Zirconium Diboride-Silicon Carbide Ultra High Temperature Ceramics
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Nonlinear Elastic Deformation of MAX Phases
p.149

Finite Element Analysis on Temperature-Stress of Permeable Refractory Ceramic under Working Process in Ladle
p.154

Convective Heat Transfer Steady Thermal Stress in a ZrO₂/FGM/Ti-6Al-4V Composite ECBF Plate with Temperature-Dependent Material Properties
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Processing and Characterization of Nano Silicon Carbide Ceramics via Precursor Pyrolysis
p.162

Synthesis, Microstructure and Mechanical Properties of ZrB₂ Ceramic Prepared by Mechanical Alloying and Spark Plasma Sintering
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Detection of Amorphous Silica in Air-Oxidized Ti₃SiC₂ at 500–1000°C by NMR and SIMS
p.169

Microstructure and Mechanical Properties of Hot Pressed ZrC-SiC-ZrB₂ Composites
p.173

Electronic Structures and Chemical Bonding of the Layered Tungsten Borides: An Ab Initio Calculation
p.178

HomeKey Engineering MaterialsKey Engineering Materials Vols. 434-435Processing and Characterization of Nano Silicon...

Processing and Characterization of Nano Silicon Carbide Ceramics via Precursor Pyrolysis

Abstract:

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.