HfAl3
metal· HfAl3
HfAl3 is an intermetallic compound combining hafnium and aluminum, belonging to the family of refractory metal aluminides used primarily in high-temperature structural applications. This material is valued in aerospace and turbine engine development for its potential to provide strength and stiffness at elevated temperatures where conventional aluminum alloys lose capability. While primarily investigated in research and advanced development contexts rather than high-volume production, HfAl3 represents the broader category of transition metal aluminides being explored to extend temperature limits in next-generation propulsion systems and hypersonic vehicle structures.
turbine engine componentshigh-temperature aerospace structuresrefractory intermetallicshypersonic vehicle materialsadvanced research applicationselevated-temperature matrix phases
Compliance & Regulations
?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)3 entries | 15,480.9 | ksi | — | ||
| ↳ | 15,480.9 | ksi | — | ||
| ↳ | 15,069.4 | ksi | — | ||
Elastic Compliance Tensor(Sij) | Matrix (redacted) | 1/GPa | — | ||
Elastic Anisotropy(AU) | 0.4858 | - | — | ||
Elastic Stiffness Tensor(Cij) | Matrix (redacted) | ksi | — | ||
Poisson's Ratio(ν)2 entries | 0.1898 | - | — | ||
| ↳ | 0.1900 | - | — | ||
Shear Modulus(G)3 entries | 12,107.3 | ksi | — | ||
| ↳ | 12,107.3 | ksi | — | ||
| ↳ | 12,096.1 | 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) | 0.2249 | 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 | — | ||
Seebeck Coefficient(S) | 10.21 | 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)2 entries | -0.4208 | eV/atom | — | ||
| ↳ | -0.3991 | 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.