HfSiW

metal

· JVASP-147460· HfSiW

HfSiW is a ternary refractory metal alloy combining hafnium, silicon, and tungsten, designed for extreme-temperature and high-stress environments where conventional superalloys reach their limits. This material family is primarily explored in aerospace and materials research contexts for applications requiring exceptional thermal stability, oxidation resistance, and mechanical retention at temperatures beyond 1500°C, making it a candidate for next-generation hypersonic vehicle components and advanced propulsion systems.

hypersonic vehicle structuresultra-high-temperature turbine componentsrefractory coating systemsaerospace thermal protectionresearch & development applications

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	0.4684	lb/in³	—

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)	0.2892	eV/atom	—
Formation Energy(ΔHf)	-0.3858	eV/atom	—

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.

HfSiW

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control