fumuraasi

Fumuraasi is a fictional material created for speculative science and worldbuilding. It is described as a high-performance ceramic-oxide compound or alloy with exceptional thermal and radiation resistance. There is no real-world chemical formula, and variations exist across different works.

Typical properties attributed to fumuraasi include a melting point above 2000 °C, a very low coefficient of thermal expansion, excellent chemical inertness, high hardness, and favorable dielectric characteristics. In fiction, the material is valued for retaining strength at extreme temperatures while remaining relatively lightweight.

In many narratives, fumuraasi is produced by advanced synthesis techniques such as high-energy sintering, spark plasma sintering, or vapor deposition. The material may appear as dense polycrystalline ceramics or as an amorphous glass-ceramic, with dopants used to tailor thermal, mechanical, or electronic properties.

Common applications in stories include heat shields for reentry, reactor components in extreme environments, protective coatings for spacefaring hardware, and insulating layers in high-power electronic systems.

Etymology and canon vary by work; the name fumuraasi is a fictional coinage with no single etymology. Some writers describe it as derived from imagined ancestral languages, while others treat it as a purely technocratic term.

See also: Ceramics; Advanced materials; Heat shields; Worldbuilding.