VIr is a vanadium-iridium alloy that combines the high-temperature strength and corrosion resistance of iridium with vanadium's contribution to hardness and wear resistance. This refractory metal alloy is used in extreme-environment applications where conventional superalloys or tungsten-based materials cannot withstand the combination of high temperature, oxidation, and mechanical stress, making it valuable for aerospace propulsion systems, nuclear reactors, and specialized tooling. Engineers select VIr when weight savings and performance at elevated temperatures outweigh the material's density and cost, though it remains primarily a research and specialized-application material rather than a commodity choice.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)3 entries | 274.3 | GPa | — | ||
| ↳ | 272.8 | GPa | — | ||
| ↳ | 238.0 | GPa | — | ||
Elastic Compliance Tensor(Sij) | Matrix (redacted) | 1/GPa | — | ||
Elastic Anisotropy(AU) | 0.6206 | - | — | ||
Elastic Stiffness Tensor(Cij) | Matrix (redacted) | Pa | — | ||
Poisson's Ratio(ν)2 entries | 0.3054 | - | — | ||
| ↳ | 0.09000 | - | — | ||
Shear Modulus(G)3 entries | 122.7 | GPa | — | ||
| ↳ | 115.7 | GPa | — | ||
| ↳ | 20.22 | GPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 14.47 | kg/m³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg)2 entries | 0.000 | eV | — | ||
| ↳ | 0.000 | eV | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Seebeck Coefficient(S) | 3.203 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.02300 | eV/atom | — | ||
Formation Energy(ΔHf)2 entries | -0.2912 | eV/atom | — | ||
| ↳ | -0.5253 | eV/atom | — |