HfAl2
metal· HfAl2
HfAl2 is an intermetallic compound combining hafnium and aluminum, belonging to the family of refractory metal aluminides. This material is of significant research interest for high-temperature structural applications due to hafnium's exceptional refractory properties and the lightweight characteristics contributed by aluminum; it represents an experimental class of materials being investigated for extreme thermal and oxidation environments where conventional superalloys reach their limits.
high-temperature structural componentsaerospace propulsion systemsrefractory coatings and matricesoxidation-resistant applicationsresearch and development materialsthermal barrier systems
Compliance & Regulations
?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)2 entries | 17,444.4 | ksi | — | ||
| ↳ | 17,444.4 | ksi | — | ||
Elastic Compliance Tensor(Sij) | Matrix (redacted) | 1/GPa | — | ||
Elastic Anisotropy(AU) | 0.03864 | - | — | ||
Elastic Stiffness Tensor(Cij) | Matrix (redacted) | ksi | — | ||
Poisson's Ratio(ν) | 0.2070 | - | — | ||
Shear Modulus(G)2 entries | 12,704.8 | ksi | — | ||
| ↳ | 12,704.8 | ksi | — |
N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form / heat treatment / basis.
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 0.2676 | lb/in³ | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 0.000 | eV | — | ||
Seebeck Coefficient(S) | -11.13 | µV/K | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.000 | eV/atom | — | ||
Formation Energy(ΔHf)3 entries | -0.4540 | eV/atom | — | ||
| ↳ | -0.4540 | eV/atom | — | ||
| ↳ | -0.4312 | eV/atom | — |
N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form / heat treatment / basis.
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.