HfNbB4
metal· JVASP-93417· HfNbB4
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.
ultra-high-temperature structural componentsthermal protection systemsrefractory applicationsaerospace propulsionwear-resistant coatingsresearch/developmental materials
Compliance & Regulations
?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K) | 38,918 | ksi | — | ||
Poisson's Ratio(ν) | 0.1900 | - | — | ||
Shear Modulus(G) | 31,293.3 | ksi | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 0.3245 | lb/in³ | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 0.000 | eV | — | ||
Magnetic Moment(μB) | 0.000 | µB | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.000 | eV/atom | — | ||
Formation Energy(ΔHf) | -0.8370 | eV/atom | — |
Verified Unverified Low confidence (<80%) Link to source
Regulatory Screening
Environmental
Export Control
RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.