Hf5Si3 — Properties & Data | MatWorld

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:

si imperial

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Method

Property	Value	Unit	Conditions
Bulk Modulus(K)2 entries	20,510.9	ksi	DFT
↳	20,510.9	ksi	DFT · PBE
Elastic Compliance Tensor(Sij)	Matrix (redacted)	1/GPa	DFT · PBE
Elastic Anisotropy(AU)	0.09756	-	DFT · PBE
Elastic Stiffness Tensor(Cij)	Matrix (redacted)	ksi	DFT · PBE
Poisson's Ratio(ν)	0.2434	-	DFT · PBE
Shear Modulus(G)2 entries	12,696	ksi	DFT
↳	12,696	ksi	DFT · PBE

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, or test environment.

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions	Source
Density(ρ)	0.3949	lb/in³	DFT · OptB88vdW

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	0.000	eV	DFT · OptB88vdW
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.02450	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-0.6895	eV/atom	DFT · OptB88vdW

Verified Unverified Low confidence (<80%) Link to source

Reference data from cited sources. Not verified or certified by MatWorld Inc. Verify against the source before use in design. Terms: engineering data

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.

Hf5Si3

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental