Hf2Si
ceramicHf2Si is a hafnium silicide ceramic compound belonging to the refractory ceramic family, characterized by high melting point and significant stiffness. This material is explored primarily in high-temperature structural applications where thermal stability and mechanical rigidity are critical, particularly in aerospace and advanced propulsion systems where it serves as a candidate for thermal protection, engine components, and extreme-environment structural applications. Hafnium silicides are valued over other refractory ceramics for their combination of oxidation resistance and thermal conductivity, making them attractive for next-generation hypersonic vehicle systems and nuclear reactor components, though industrial adoption remains limited compared to established alternatives like SiC or alumina.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)3 entries | — | ksi | — | — | |
| ↳ | — | ksi | — | — | |
| ↳ | — | ksi | — | — | |
Elastic Compliance Tensor(Sij) | Matrix (redacted) | 1/GPa | — | — | |
Elastic Anisotropy(AU) | — | - | — | — | |
Elastic Stiffness Tensor(Cij) | Matrix (redacted) | ksi | — | — | |
Poisson's Ratio(ν)2 entries | — | - | — | — | |
| ↳ | — | - | — | — | |
Shear Modulus(G)3 entries | — | ksi | — | — | |
| ↳ | — | ksi | — | — | |
| ↳ | — | ksi | — | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | — | lb/in³ | — | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg)2 entries | — | eV | — | — | |
| ↳ | — | eV | — | — | |
Magnetic Moment(μB) | — | µB | — | — | |
Seebeck Coefficient(S) | — | µV/K | — | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | — | eV/atom | — | — | |
Formation Energy(ΔHf) | — | eV/atom | — | — |