Hf5Si3

ceramic
· Hf5Si3

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.

ultra-high-temperature aerospace componentshypersonic vehicle structuresturbine engine applicationsrefractory coatingsthermal protection systemsresearch and development materials

Compliance & Regulations

?Conflict Free?RoHS?REACH?TSCA?Prop 65
Units:
siimperial
PropertyValueUnitConditionsSource
Bulk Modulus(K)2 entries
141.4
GPa—
↳
141.4
GPa—
Elastic Compliance Tensor(Sij)
Matrix (redacted)
1/GPa—
Elastic Anisotropy(AU)
0.09756
-—
Elastic Stiffness Tensor(Cij)
Matrix (redacted)
Pa—
Poisson's Ratio(ν)
0.2434
-—
Shear Modulus(G)2 entries
87.54
GPa—
↳
87.54
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
PropertyValueUnitConditionsSource
Density(ρ)
10.93
kg/m³—
Verified Unverified Low confidence (<80%) Link to source
PropertyValueUnitConditionsSource
Band Gap(Eg)
0.000
eV—
Magnetic Moment(μB)
0.000
µB—
Verified Unverified Low confidence (<80%) Link to source
PropertyValueUnitConditionsSource
Energy Above Hull(ΔEhull)
0.02450
eV/atom—
Formation Energy(ΔHf)
-0.6895
eV/atom—
Verified Unverified Low confidence (<80%) Link to source

Regulatory Screening

Environmental

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.