SiIr3

ceramic

· SiIr3

SiIr3 is an intermetallic ceramic compound combining silicon and iridium, belonging to the family of refractory ceramics and metal silicides. This material is primarily of research interest rather than established industrial production, explored for extreme-temperature and high-strength applications where conventional ceramics or metals fall short. Its notable characteristics—combining the hardness and thermal stability of ceramic silicides with the density and stiffness contributions from iridium—position it as a candidate material for next-generation aerospace, wear-resistant, and high-temperature structural applications, though engineering adoption remains limited pending further development and cost optimization.

high-temperature structural applicationsaerospace engine componentswear and abrasion resistancerefractory coatingsresearch and development materialsextreme environment applications

Compliance & Regulations

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

Units:

si imperial

Filter by

Method

Property	Value	Unit	Conditions
Bulk Modulus(K)3 entries	43,366.6	ksi	DFT
↳	43,045.8	ksi	DFT · OptB88vdW
↳	43,366.6	ksi	DFT · PBE
Elastic Compliance Tensor(Sij)	Matrix (redacted)	1/GPa	DFT · PBE
Elastic Anisotropy(AU)	0.09117	-	DFT · PBE
Elastic Stiffness Tensor(Cij)	Matrix (redacted)	ksi	DFT · PBE
Poisson's Ratio(ν)2 entries	0.1100	-	DFT · OptB88vdW
↳	0.3240	-	DFT · PBE
Shear Modulus(G)3 entries	17,294	ksi	DFT
↳	3,578.1	ksi	DFT · OptB88vdW
↳	17,294	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)	0.6401	lb/in³	DFT · OptB88vdW

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

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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	0.000420	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000386	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-19.22	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	-18.56	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)	-0.3173	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

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.

SiIr3 — Properties & Data | MatWorld

SiIr3

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental