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.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)3 entries | 106.7 | GPa | — | ||
| ↳ | 106.7 | GPa | — | ||
| ↳ | 103.9 | GPa | — | ||
Elastic Compliance Tensor(Sij) | Matrix (redacted) | 1/GPa | — | ||
Elastic Anisotropy(AU) | 0.4858 | - | — | ||
Elastic Stiffness Tensor(Cij) | Matrix (redacted) | Pa | — | ||
Poisson's Ratio(ν)2 entries | 0.1898 | - | — | ||
| ↳ | 0.1900 | - | — | ||
Shear Modulus(G)3 entries | 83.48 | GPa | — | ||
| ↳ | 83.48 | GPa | — | ||
| ↳ | 83.40 | GPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 6.225 | kg/m³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 0.000 | eV | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Seebeck Coefficient(S) | 10.21 | µV/K | — |
| 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 | — |