HfAl is an intermetallic compound combining hafnium and aluminum, representing a high-performance metallic material with potential applications in extreme-temperature and high-strength environments. This material belongs to the refractory metal alloy family and is primarily investigated for aerospace, defense, and high-temperature structural applications where conventional alloys reach their performance limits. The hafnium-aluminum system offers the combination of hafnium's high melting point and density with aluminum's lightweight characteristics, making it of particular interest for next-generation engine components, hypersonic vehicle structures, and nuclear or space propulsion systems where thermal stability and specific strength are critical.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)3 entries | 117.1 | GPa | — | ||
| ↳ | 117.1 | GPa | — | ||
| ↳ | 116.8 | GPa | — | ||
Elastic Compliance Tensor(Sij) | Matrix (redacted) | 1/GPa | — | ||
Elastic Anisotropy(AU) | 0.5123 | - | — | ||
Elastic Stiffness Tensor(Cij) | Matrix (redacted) | Pa | — | ||
Poisson's Ratio(ν)2 entries | 0.2376 | - | — | ||
| ↳ | 0.2500 | - | — | ||
Shear Modulus(G)3 entries | 74.49 | GPa | — | ||
| ↳ | 74.49 | GPa | — | ||
| ↳ | 73.53 | GPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 8.976 | kg/m³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 0.000 | eV | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Seebeck Coefficient(S) | 13.89 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.00420 | eV/atom | — | ||
Formation Energy(ΔHf)2 entries | -0.4135 | eV/atom | — | ||
| ↳ | -0.3953 | eV/atom | — |