HfB4Ir3 is an experimental hafnium–iridium boride ceramic compound combining the refractory properties of hafnium boride with iridium's high-temperature strength and oxidation resistance. This material exists primarily in research contexts as part of the ultra-high-temperature ceramic (UHTC) family, where it is being investigated for extreme thermal and mechanical environments that exceed the capabilities of conventional aerospace ceramics. Engineers would consider this compound for applications demanding exceptional performance at very high temperatures combined with chemical stability, though it remains a developmental material with limited commercial availability compared to established alternatives like hafnium carbide or zirconium diboride.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 0.5365 | lb/in³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg)2 entries | 0.000 | eV | — | ||
| ↳ | 0.000 | eV | — | ||
Seebeck Coefficient(S) | 1.637 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.000 | eV/atom | — | ||
Formation Energy(ΔHf) | -0.4913 | eV/atom | — |