Combustion Synthesis of Silicon Carbide in Nitrogen Atmosphere

Silicon carbide (SiC) ceramics were prepared by carbothermal reduction together with in-situ reaction bonding. Raw rice husk was carbonized in an incineration furnace. The carbonized rice husk was ground and was then treated with hydrochloric acid by varying concentrations. The sample powders were mixed with silicon metal powder and pyrolyzed at various temperatures in either argon or nitrogen atmosphere. Silicon carbide phase was found in all pyrolyzed samples. Cristobalite was found in argon atmosphere pyrolyzed samples while silicon oxynitride was found in the samples pyrolyzed in nitrogen atmosphere at lower than 1500 °C. Silicon carbide whisker is the main phase on the surface of pyrolyzed sample. Increasing pyrolysis temperatures decreased the amount and size of silicon carbide whisker but increased the silicon carbide particle. Porosity and weight loss of samples after pyrolysis were increased with increasing temperatures due to the reaction in the system.

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Mechanism of combustion synthesis of silicon carbide

Journal of Applied Physics ◽

10.1063/1.356660 ◽

1994 ◽

Vol 75 (11) ◽

pp. 7252-7257 ◽

Cited By ~ 48

Author(s):

J. Narayan ◽

R. Raghunathan ◽

R. Chowdhury ◽

K. Jagannadham

Keyword(s):

Silicon Carbide ◽

Combustion Synthesis

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SILICON CARBIDE CRYSTALS GROWN IN NITROGEN ATMOSPHERE

Mineralogical Journal ◽

10.2465/minerj1953.4.333 ◽

1965 ◽

Vol 4 (5) ◽

pp. 333-355 ◽

Cited By ~ 50

Author(s):

TSUTOMU KAWAMURA

Keyword(s):

Silicon Carbide ◽

Nitrogen Atmosphere

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Direct Combustion Synthesis of Silicon Carbide Nanopowder from the Elements

Journal of the American Ceramic Society ◽

10.1111/jace.12107 ◽

2012 ◽

Vol 96 (1) ◽

pp. 111-117 ◽

Cited By ~ 36

Author(s):

Alexander S. Mukasyan ◽

Ya-Cheng Lin ◽

Alexander S. Rogachev ◽

Dmitry O. Moskovskikh

Keyword(s):

Silicon Carbide ◽

Combustion Synthesis ◽

Direct Combustion

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Fabrication of Aluminum-Containing Silicon Carbide Fibers from Electrospinning

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.562-564.427 ◽

2012 ◽

Vol 562-564 ◽

pp. 427-430

Author(s):

Yong Chen ◽

Yu Xi Yu ◽

Hai Sheng San ◽

Da Xiang Yang

Keyword(s):

Silicon Carbide ◽

Nitrogen Atmosphere ◽

Electrospun Fibers ◽

Injection Speed ◽

Silicon Carbide Fibers

Aluminum-containing silicon carbide (SiC/Al) fibers were fabricated by electrospinning a polyaluminocarbosilane (PACS) solution followed by the pyrolysis of the electrospun fibers at 1200 oC in a nitrogen atmosphere after air-curing at 200 oC. The optimum electrospinning conditions were a 0.9 g/mL PACS solution with 20%DMF/20%THF/60% toluene composition, a 20 kV spinning voltage, a 2 mL/h injection speed and a 10 cm receiving distance. The obtained SiC/Al fibers have a diameter in the range of 0.7~1.5 m.

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