Molten Salt Synthesis and Characterization of Titanium Carbide-Coated Graphite Flakes for Refractory Castable Applications

Abstract

Titanium carbide (TiC)-coated graphite flakes were prepared using the low-temperature molten salt synthesis technique. Titanium (Ti) particles were mixed with graphite in a mass ratio (Ti/C) between 1/5 and 3/5, and reacted in alkali chloride salts at 650-9501C for 4-8 h. The TiC formation reaction was complete in KCl or the KCl-LiCl eutectic salt after 8 h at 8501C, but not in LiCl or NaCl, indicating that the former were more effective than the latter in accelerating the TiC coating formation. Although various Ti/C ratios were used, the TiC formation reaction was complete in all samples heated for 4 h at 9501C, indicating that the amounts/thickness of TiC coatings could be readily tailored for future castable applications. TiC Int.coatings prepared in KCl or the KCl-LiCl eutectic salt (after 4 h at 9501C or 8 h at 8501C) were of high quality: crack free, homogeneous, and comprising nanosized TiC particles. The coating synthesis process is believed to be dominated by the ''template-growth'' mechanism.

Effect of surface‐treated graphites on the properties of carbon‐containing monolithic refractory materials—A comprehensive comparison

“…To cope up with these practical problems, the graphite surface has been modified by various methods such as sol‐gel, pelletization, molten salt synthesis, etc . The present author opted for cost‐competent thin sol‐gel coating on graphite and obtained a threefold benefit from this novel material.…”

“…To cope up with these practical problems, the graphite surface has been modified by various methods such as solgel, pelletization, molten salt synthesis, etc. [4][5][6] The present author opted for cost-competent thin sol-gel coating on graphite [7][8][9][10][11][12][13][14][15][16][17][18][19] and obtained a threefold benefit from this novel material. Firstly, the hydrophilic nanostructured coating demanded much less water; secondly, the coating improved the service life of individual graphite flakes in the high temperature of the furnace.…”

Extended studies on surface‐treated graphite vis‐à‐vis its application in high alumina refractory castable

“…The researchers mostly adopted the surface modification of graphite by a suitable coating on graphite. In this regard, molten salt syntheses, gas state reaction, CVD coatings, atomic layer deposition, sol‐gel synthesis of thin film are noteworthy . In this pursuit of achieving high‐tech and heavy‐duty ceramic‐carbon monoliths for steel plants, our ideal choice was to develop coated graphite by sol‐gel route.…”

“…In this regard, molten salt syntheses, gas state reaction, CVD coatings, atomic layer deposition, sol-gel synthesis of thin film are noteworthy. [13][14][15][16][17][18] In this pursuit of achieving hightech and heavy-duty ceramic-carbon monoliths for steel plants, our ideal choice was to develop coated graphite by sol-gel route. Taking the clue that hydrophilic thin film on graphite can assist fabrication and carbon protection, a cost-competent nanostructured ceramic oxide coated graphite for monolithic refractories has already been reported.…”

In Situ TiC Ceramic Particles Locally Reinforced Al‐Si Matrix Composites Prepared by SHS‐Casting Method from the Al‐Si‐Ti‐C System

“…TiC is particularly attractive because of its exceptional multifunctional properties, such as low density, high melting point, good thermal and chemical stability, high hardness, and excellent wear resistance . As one of the potential and promising materials, TiC has been applied for cutting cools in the mechanical industry, high‐temperature ceramic crucibles, and reinforcement in the particulate reinforced metal matrix composites (PRMMCs).…”