Nb5Si3
metal· Nb5Si3
Nb5Si3 is an intermetallic compound combining niobium and silicon, belonging to the family of refractory metal silicides. It is primarily of research and developmental interest for ultra-high-temperature structural applications where traditional superalloys reach their limits, particularly in aerospace propulsion systems and advanced thermal environments. Engineers evaluate Nb5Si3-based materials for their potential to enable higher operating temperatures in jet engines and hypersonic vehicles compared to conventional nickel-superalloys, though challenges with room-temperature brittleness and oxidation resistance continue to drive material refinement efforts.
turbine blades and vaneshypersonic vehicle structuresrocket engine componentshigh-temperature composite reinforcementrefractory coating systemsadvanced aerospace propulsion
Compliance & Regulations
?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)2 entries | 185.4 | GPa | — | ||
| ↳ | 185.4 | GPa | — | ||
Elastic Compliance Tensor(Sij) | Matrix (redacted) | 1/GPa | — | ||
Elastic Anisotropy(AU) | 1.654 | - | — | ||
Elastic Stiffness Tensor(Cij) | Matrix (redacted) | Pa | — | ||
Poisson's Ratio(ν) | 0.3443 | - | — | ||
Shear Modulus(G)2 entries | 64.40 | GPa | — | ||
| ↳ | 64.40 | GPa | — |
N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form / heat treatment / basis.
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 6.951 | kg/m³ | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 0.000 | eV | — | ||
Magnetic Moment(μB) | 0.000 | µB | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.000 | eV/atom | — | ||
Formation Energy(ΔHf)2 entries | -0.6695 | eV/atom | — | ||
| ↳ | -0.5960 | eV/atom | — |
N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form / heat treatment / basis.
Verified Unverified Low confidence (<80%) Link to source
Regulatory Screening
Environmental
Export Control
RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.