HfNbB4 is a refractory metal boride compound combining hafnium, niobium, and boron—a high-hardness ceramic material in the ultra-high-temperature boride family. This is an experimental/research material studied for extreme-environment applications where conventional superalloys fail; the hafnium-niobium combination targets superior oxidation resistance and thermal stability beyond single-element boride systems. Engineers consider it for applications demanding both exceptional hardness and stability above 1500 °C, though processing and scalability remain active research areas.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K) | 38,918 | ksi | — | ||
Poisson's Ratio(ν) | 0.1900 | - | — | ||
Shear Modulus(G) | 31,293.3 | ksi | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 0.3245 | lb/in³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 0.000 | eV | — | ||
Magnetic Moment(μB) | 0.000 | µB | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.000 | eV/atom | — | ||
Formation Energy(ΔHf) | -0.8370 | eV/atom | — |