TmB2

Thulium diboride (TmB2) is an ultra-high-temperature ceramic compound belonging to the hexagonal boride family, characterized by strong covalent bonding between thulium and boron atoms. While primarily a research material rather than a widely commercialized engineering ceramic, TmB2 is investigated for extreme thermal environments and wear-resistant applications where conventional ceramics fall short; the rare-earth boride family shows promise for hypersonic vehicle components, thermal protection systems, and cutting tool coatings where superior hardness and refractory properties are needed at temperatures exceeding typical alumina or silicon carbide limits.