HfSiMo — Properties & Data | MatWorld

HfSiMo

metal

· HfSiMo

HfSiMo is a ternary refractory metal alloy combining hafnium, silicon, and molybdenum, designed for extreme-temperature structural applications. This material belongs to the family of ultra-high-temperature ceramics and refractory metals, offering exceptional thermal stability and mechanical retention at temperatures where conventional superalloys fail. The alloy is primarily of research and development interest for aerospace propulsion systems, nuclear reactors, and hypersonic vehicle structures where oxidation resistance and creep resistance at elevated temperatures are critical.

hypersonic vehicle structuresrocket nozzles and thruster componentsnuclear reactor materialsrefractory high-temperature coatingsthermal protection systemsaerospace engine components

Compliance & Regulations

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

Units:

si imperial

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Method

Property	Value	Unit	Conditions
Bulk Modulus(K)3 entries	188.5	GPa	DFT
↳	187.5	GPa	DFT · OptB88vdW
↳	188.5	GPa	DFT · PBE
Elastic Compliance Tensor(Sij)	Matrix (redacted)	1/GPa	DFT · PBE
Elastic Anisotropy(AU)	0.4800	-	DFT · PBE
Elastic Stiffness Tensor(Cij)	Matrix (redacted)	Pa	DFT · PBE
Poisson's Ratio(ν)2 entries	0.2700	-	DFT · OptB88vdW
↳	0.2673	-	DFT · PBE
Shear Modulus(G)3 entries	103.9	GPa	DFT
↳	104.5	GPa	DFT · OptB88vdW
↳	103.9	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.

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Property	Value	Unit	Conditions	Source
Density(ρ)	10.03	kg/m³	DFT · OptB88vdW

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	0.000	eV	DFT · OptB88vdW
↳	0.000	eV	DFT · TBmBJ
Thermoelectric Power Factor(PF)2 entries	0.000737	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000749	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-0.1700	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.4900	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)	-0.6374	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

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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.

HfSiMo

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

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