HfSi is a hafnium silicide ceramic compound that belongs to the refractory metal silicide family, characterized by extremely high melting points and excellent thermal stability. This material is primarily investigated for ultra-high-temperature structural applications in aerospace and power generation, where it can maintain mechanical integrity at temperatures far exceeding conventional superalloys. Its high density and stiffness make it valuable for thermal protection systems, turbine engine components, and advanced propulsion applications where both thermal and mechanical performance are critical; however, it remains largely in the research and development phase compared to more established refractory ceramics.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)2 entries | 22,140.7 | ksi | — | ||
| ↳ | 22,140.7 | ksi | — | ||
Elastic Compliance Tensor(Sij) | Matrix (redacted) | 1/GPa | — | ||
Elastic Anisotropy(AU) | 0.4229 | - | — | ||
Elastic Stiffness Tensor(Cij) | Matrix (redacted) | ksi | — | ||
Poisson's Ratio(ν) | 0.2409 | - | — | ||
Shear Modulus(G)2 entries | 13,867.3 | ksi | — | ||
| ↳ | 13,867.3 | ksi | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 0.3587 | lb/in³ | — |
| 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) | -25.06 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.000 | eV/atom | — | ||
Formation Energy(ΔHf)2 entries | -0.7348 | eV/atom | — | ||
| ↳ | -0.7342 | eV/atom | — |