YSi — Properties & Data | MatWorld

YSi

Name: YSi
Brand: MatWorld

ceramic

· YSi

YSi is an yttrium silicide ceramic compound combining yttrium and silicon into a hard, refractory material designed for extreme-temperature and high-stress applications. This compound exhibits properties typical of silicide ceramics—high stiffness, low density, and thermal stability—making it candidates for aerospace propulsion, thermal barriers, and structural composites where conventional metals or oxides reach their limits. YSi is primarily of research and advanced engineering interest rather than a commodity material, with development ongoing to overcome brittleness and enable broader commercial adoption in next-generation engines and hypersonic vehicles.

aerospace engine componentshigh-temperature structural ceramicsthermal barrier coatingsrefractory applicationsceramic matrix compositesadvanced propulsion systems

Compliance & Regulations

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

Units:

si imperial

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Method

Property	Value	Unit	Conditions
Bulk Modulus(K)3 entries	89.42	GPa	DFT
↳	55.82	GPa	DFT · OptB88vdW
↳	89.42	GPa	DFT · PBE
Elastic Compliance Tensor(Sij)	Matrix (redacted)	1/GPa	DFT · PBE
Elastic Anisotropy(AU)	0.4547	-	DFT · PBE
Elastic Stiffness Tensor(Cij)	Matrix (redacted)	Pa	DFT · PBE
Poisson's Ratio(ν)2 entries	0.2100	-	DFT · OptB88vdW
↳	0.2068	-	DFT · PBE
Shear Modulus(G)3 entries	65.16	GPa	DFT
↳	8.170	GPa	DFT · OptB88vdW
↳	65.16	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.

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

Property	Value	Unit	Conditions	Source
Density(ρ)	3.404	kg/m³	DFT · OptB88vdW

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

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Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)	0.000	eV	DFT · OptB88vdW
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000113	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000110	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-3.413	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	-3.550	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

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Method

Property	Value	Unit	Conditions
Energy Above Hull(ΔEhull)	0.7201	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)2 entries	-0.1313	eV/atom	DFT · OptB88vdW
↳	-0.8364	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

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.

YSi

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental