Tarbides

Tarbides are a proposed class of solid-state materials in inorganic chemistry and materials science. They are described as carbide-like networks in which tar-derived organic linkages connect metal or metalloid carbide units. The term combines tar and carbide, reflecting a speculative origin from tar-based precursors.

In composition, tarbides are envisioned as containing discrete carbide domains—such as metal carbides or silicon carbides—bridged by carbon-rich, hydrogen-containing moieties derived from processed tar. This yields a heterogeneous, cross-linked matrix with nanoscale phase separation and variable porosity depending on processing.

Reported properties include high hardness and thermal stability, coupled with moderate electrical conductivity that depends on the metal component and degree of graphitization. The organic segments can impart toughness, but the materials may be brittle and processing can be challenging due to phase incompatibilities and volatile tar components.

Synthesis routes described in speculative literature involve pyrolysis of tar-containing resin blends with metal precursors, followed by carburization at high temperature under inert or reducing atmospheres. Alternative methods invoke chemical vapor deposition or sol-gel routes to improve phase control and density.

Potential applications include hard coatings, cutting tools, catalyst supports, or energy-storage electrodes, where the combination of ceramic stiffness and carbon-rich connectivity could be advantageous. Real-world viability remains unproven, and performance claims vary across sources.

Status and evaluation: The term tarbide is not widely established in mainstream peer-reviewed literature. Many discussions are preliminary, with limited reproducibility and characterization. As a result, tarbide definitions, properties, and applications remain subject to ongoing debate and future validation.