Hf5Si3 is a hafnium silicide ceramic compound belonging to the refractory metal silicide family, characterized by a hexagonal crystal structure and high density. This material is primarily investigated for ultra-high-temperature structural applications where thermal stability and oxidation resistance are critical, particularly in aerospace propulsion systems, hypersonic vehicle components, and next-generation power generation equipment. Hafnium silicides offer superior high-temperature performance compared to conventional superalloys and are notable for maintaining mechanical integrity at temperatures exceeding 1500°C, making them candidates for engine components, leading edges, and thermal protection systems, though industrial adoption remains limited due to manufacturing complexity and cost.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)2 entries | 20,510.9 | ksi | — | ||
| ↳ | 20,510.9 | ksi | — | ||
Elastic Compliance Tensor(Sij) | Matrix (redacted) | 1/GPa | — | ||
Elastic Anisotropy(AU) | 0.09756 | - | — | ||
Elastic Stiffness Tensor(Cij) | Matrix (redacted) | ksi | — | ||
Poisson's Ratio(ν) | 0.2434 | - | — | ||
Shear Modulus(G)2 entries | 12,696 | ksi | — | ||
| ↳ | 12,696 | ksi | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 0.3949 | lb/in³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 0.000 | eV | — | ||
Magnetic Moment(μB) | 0.000 | µB | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.02450 | eV/atom | — | ||
Formation Energy(ΔHf) | -0.6895 | eV/atom | — |