YAlSi — Properties & Data | MatWorld

YAlSi

metal

· YAlSi

YAlSi is an intermetallic compound combining yttrium, aluminum, and silicon, belonging to the family of rare-earth transition-metal aluminides. This material is primarily of research interest for high-temperature structural applications, where its combination of low density and ceramic-like stiffness offers potential advantages over conventional superalloys. YAlSi and related ternary intermetallics are being investigated for aerospace propulsion systems and advanced power generation where operating temperatures and weight reduction are critical design drivers, though commercial deployment remains limited compared to established nickel-based superalloys.

high-temperature aerospace structuresexperimental turbine applicationslightweight intermetallic researchadvanced propulsion systemshigh-temperature composite reinforcement

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	88.44	GPa	DFT
↳	86.71	GPa	DFT · OptB88vdW
↳	88.44	GPa	DFT · PBE
Elastic Compliance Tensor(Sij)	Matrix (redacted)	1/GPa	DFT · PBE
Elastic Anisotropy(AU)	0.2447	-	DFT · PBE
Elastic Stiffness Tensor(Cij)	Matrix (redacted)	Pa	DFT · PBE
Poisson's Ratio(ν)2 entries	0.2100	-	DFT · OptB88vdW
↳	0.2137	-	DFT · PBE
Shear Modulus(G)3 entries	62.58	GPa	DFT
↳	62.85	GPa	DFT · OptB88vdW
↳	62.58	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)	4.005	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
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000662	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000647	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	9.260	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	8.873	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)	-0.6433	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.

YAlSi

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

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