Graphite-metal carbide composites, Volume 507
Investigations were conducted to determine the feasibility of fabricating metal-graphite composites by hot pressing at 2800 deg - 3000 deg C. Mixtures of calcined petroleum coke with varying amounts of different metals (or their carbides) were used as the raw materials and no binders were involved in this simple, one-step Process.
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A/G DIRECTION Areas in 30 atomic percent beryllium billet Boron carbide BORON-GRAPHITE bulk densities Carbide Diffusion Areas carbide grains carbide phase Carbide Theo carbide-graphite system Carbon composition pressed contained in Table data are contained Electron Image Electron Microprobe Analyzer eutectic formation eutectic temperature finer starting materials FLEXURAL STRENGTH FUNCTION OF WT g/cc GRAIN SIZE mesh graphite matrix hafnium Hafnium carbide Hafnium-Graphite Hf-C Hf-e high strength hot pressing humidity increase in strength increasing metal content mesh 325 mesh METAL ADDITIVE metal carbide metal level Metal Wt Microstructure of 50 Mo-c Mo-f mold molybdenum Molybdenum-Graphite Nb-C niobium NIOBIUM-GRAPHITE physical properties PRESSED AT 2800°C Pressing Temp Property data Ratio W/G ray Image FIG room temperature shows sintering strongest bodies tantalum carbide Th-c theoretical density theoretical volume percent thermal expansion thorium titanium Titanium-Graphite uranium W/G A/G W/G Low Low zirconium Zirconium carbide Zirconium-Graphite Zr-d ZrC b ZrC