Nb5SiB2

metal

· JVASP-140788· Nb5SiB2

Nb5SiB2 is a niobium-silicon-boron intermetallic compound belonging to the refractory metal alloy family, designed for extreme-temperature structural applications. This material is primarily investigated in aerospace and power generation sectors where conventional superalloys reach their performance limits, as the niobium-silicide-boride system offers potential for retained strength at temperatures where nickel-based superalloys degrade. Nb5SiB2 represents an emerging research material in the ultra-high-temperature composites field; while not yet in widespread commercial production, compounds in this family are valued for their potential to enable higher operating temperatures in jet engines, rocket nozzles, and advanced thermal protection systems.

hypersonic vehicle structuresturbine blade coatingsrocket propulsion systemsthermal protection systemsnext-generation aerospace materialsresearch-phase refractory compounds

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	0.2675	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)	0.000	eV/atom	—
Formation Energy(ΔHf)	-0.6093	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.

Nb5SiB2

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control