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Title: Carbothermal synthesis of silicon carbide

Abstract

Silicon carbide powders were synthesized from various silica and carbon sources by a carbothermal reduction process at temperatures between 1500 and 1600/sup 0/C. The silica sources were fumed silica, methyltrimethoxysilane, and microcrystalline quartz. The carbon sources were petroleum pitch, phenolic resin, sucrose, and carbon black. Submicron SiC powders were synthesized. Their morphologies included equiaxed loosely-bound agglomerates, equiaxed hard-shell agglomerates, and whiskers. Morphology changed with the furnace atmosphere (argon, nitrogen, or nitrogen-4% hydrogen). The best sintering was observed in SiC derived from the fumed-silica-pitch and fumed-silica-sucrose precursors. The poorest sintering was observed in SiC derived from microcrystalline quartz and carbon black. 11 refs., 16 figs., 10 tabs.

Authors:
; ; ;
Publication Date:
Research Org.:
Oak Ridge National Lab., TN (USA)
OSTI Identifier:
5679139
Report Number(s):
ORNL-6169
ON: DE85013546
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; SILICON CARBIDES; CHEMICAL COMPOSITION; DENSITY; HOT PRESSING; MORPHOLOGY; PARTICLE SIZE; SURFACE AREA; SYNTHESIS; ARGON; CARBON BLACK; EXPERIMENTAL DATA; FLOWSHEETS; GELS; HYDROGEN; NITROGEN; PITCHES; QUARTZ; REDUCTION; SACCHAROSE; SILICA; SINTERING; VERY HIGH TEMPERATURE; CARBIDES; CARBOHYDRATES; CARBON; CARBON COMPOUNDS; CHALCOGENIDES; CHEMICAL REACTIONS; COLLOIDS; DATA; DIAGRAMS; DISACCHARIDES; DISPERSIONS; ELEMENTS; FABRICATION; FLUIDS; GASES; INFORMATION; MATERIALS WORKING; MINERALS; NONMETALS; NUMERICAL DATA; OLIGOSACCHARIDES; ORGANIC COMPOUNDS; OTHER ORGANIC COMPOUNDS; OXIDE MINERALS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; PRESSING; RARE GASES; SACCHARIDES; SILICON COMPOUNDS; SILICON OXIDES; SIZE; SURFACE PROPERTIES; 360201* - Ceramics, Cermets, & Refractories- Preparation & Fabrication

Citation Formats

Janney, M A, Wei, G C, Kennedy, C R, and Harris, L A. Carbothermal synthesis of silicon carbide. United States: N. p., 1985. Web.
Janney, M A, Wei, G C, Kennedy, C R, & Harris, L A. Carbothermal synthesis of silicon carbide. United States.
Janney, M A, Wei, G C, Kennedy, C R, and Harris, L A. 1985. "Carbothermal synthesis of silicon carbide". United States.
@article{osti_5679139,
title = {Carbothermal synthesis of silicon carbide},
author = {Janney, M A and Wei, G C and Kennedy, C R and Harris, L A},
abstractNote = {Silicon carbide powders were synthesized from various silica and carbon sources by a carbothermal reduction process at temperatures between 1500 and 1600/sup 0/C. The silica sources were fumed silica, methyltrimethoxysilane, and microcrystalline quartz. The carbon sources were petroleum pitch, phenolic resin, sucrose, and carbon black. Submicron SiC powders were synthesized. Their morphologies included equiaxed loosely-bound agglomerates, equiaxed hard-shell agglomerates, and whiskers. Morphology changed with the furnace atmosphere (argon, nitrogen, or nitrogen-4% hydrogen). The best sintering was observed in SiC derived from the fumed-silica-pitch and fumed-silica-sucrose precursors. The poorest sintering was observed in SiC derived from microcrystalline quartz and carbon black. 11 refs., 16 figs., 10 tabs.},
doi = {},
url = {https://www.osti.gov/biblio/5679139}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed May 01 00:00:00 EDT 1985},
month = {Wed May 01 00:00:00 EDT 1985}
}

Technical Report:
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