|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||8th International Symposium on High Temperature Metallurgical Processing
||Synthesis of Carbide Ceramics via Reduction of Adsorbed Anions on an Activated Carbon Matrix
||Grant Wallace, Jerome P. Downey, Jannette Chorney, David Hutchins, Alaina Mallard
|On-Site Speaker (Planned)
Current commercial metal carbide production processes require temperatures above 1700oC and often use extensive milling operations to produce a powder product. A process that could reduce the energy requirements of commercial carbide production would reduce operating costs, allowing these materials to be implemented in a greater number of applications. This study examined carbide production via carbothermal reduction and carburization under inert and reducing gas atmospheres. Precursor materials were formed by adsorption of silicate (SiO32-) anions and tungstate (WO42-) anions onto activated carbon. The anions were converted into silicon carbide (SiC) whiskers and a mixture of tungsten and tungsten carbide (W/WC/W2C) crystals at 950oC and 1400oC, respectively. The adsorption process was statistically optimized via a central composite response surface analysis using DesignExpert 9. Inductive coupled plasma optical emission spectroscopy (ICP-OES) was used to measure and optimize adsorption efficiency; carburization products were characterized using X-ray diffraction and scanning electron microscopy.
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