Hf2Si — Properties & Data | MatWorld

Hf2Si

Name: Hf2Si
Brand: MatWorld

ceramic

· Hf2Si

Hf2Si 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.

hypersonic vehicle thermal protectionadvanced rocket propulsion nozzleshigh-temperature structural compositesnuclear reactor internalsaerospace engine componentsrefractory coatings

Compliance & Regulations

?Conflict Free?RoHS?REACH?TSCA?Prop 65

Units:

si imperial

Filter by

Method

Property	Value	Unit	Conditions
Bulk Modulus(K)3 entries	141.1	GPa	DFT
↳	142.5	GPa	DFT · OptB88vdW
↳	141.1	GPa	DFT · PBE
Elastic Compliance Tensor(Sij)	Matrix (redacted)	1/GPa	DFT · PBE
Elastic Anisotropy(AU)	0.09622	-	DFT · PBE
Elastic Stiffness Tensor(Cij)	Matrix (redacted)	Pa	DFT · PBE
Poisson's Ratio(ν)2 entries	0.2300	-	DFT · OptB88vdW
↳	0.2141	-	DFT · PBE
Shear Modulus(G)3 entries	99.68	GPa	DFT
↳	95.85	GPa	DFT · OptB88vdW
↳	99.68	GPa	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)	11.40	kg/m³	DFT · OptB88vdW

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

Filter by

Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)3 entries	0.000	eV	Measured
↳	0.000	eV	DFT · OptB88vdW
↳	0.000	eV	DFT · TBmBJ
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000250	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000238	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	7.907	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	7.160	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C

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
Energy Above Hull(ΔEhull)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-0.6806	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.

Hf2Si

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental