Nb5Si3

Name: Nb5Si3
Brand: MatWorld

metal

· Nb5Si3

Nb5Si3 is an intermetallic compound combining niobium and silicon, belonging to the family of refractory metal silicides. It is primarily of research and developmental interest for ultra-high-temperature structural applications where traditional superalloys reach their limits, particularly in aerospace propulsion systems and advanced thermal environments. Engineers evaluate Nb5Si3-based materials for their potential to enable higher operating temperatures in jet engines and hypersonic vehicles compared to conventional nickel-superalloys, though challenges with room-temperature brittleness and oxidation resistance continue to drive material refinement efforts.

turbine blades and vaneshypersonic vehicle structuresrocket engine componentshigh-temperature composite reinforcementrefractory coating systemsadvanced aerospace propulsion

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)2 entries	26,884.2	ksi	DFT
↳	26,884.2	ksi	DFT · PBE
Elastic Compliance Tensor(Sij)	Matrix (redacted)	1/GPa	DFT · PBE
Elastic Anisotropy(AU)	1.654	-	DFT · PBE
Elastic Stiffness Tensor(Cij)	Matrix (redacted)	ksi	DFT · PBE
Poisson's Ratio(ν)	0.3443	-	DFT · PBE
Shear Modulus(G)2 entries	9,339.8	ksi	DFT
↳	9,339.8	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)	0.2511	lb/in³	DFT · OptB88vdW

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

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Method

Property	Unit	Conditions
Band Gap(Eg)2 entries	eV	DFT · OptB88vdW
↳	eV	DFT · TBmBJ
Magnetic Moment(μB)	µB	DFT · OptB88vdW

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

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Method

Property	Value	Unit	Conditions
Energy Above Hull(ΔEhull)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)2 entries	-0.5960	eV/atom	DFT · OptB88vdW
↳	-0.6695	eV/atom	Measured

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

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

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.

Nb5Si3 — Properties & Data | MatWorld

Nb5Si3

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

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