SiIr — Properties & Data | MatWorld

SiIr

Name: SiIr
Brand: MatWorld

ceramic

· SiIr

SiIr is a ceramic intermetallic compound combining silicon and iridium, representing a high-density material system typically explored for extreme-environment applications. This material belongs to the family of refractory ceramics and metal-ceramic composites, offering exceptional hardness and thermal stability characteristic of iridium-based compounds. SiIr is primarily of research and specialized industrial interest, used in applications demanding superior wear resistance, high-temperature strength, and chemical inertness where cost and fabrication complexity are secondary concerns.

high-temperature structural componentswear-resistant coatingsaerospace engine applicationschemical processing equipmentabrasive and cutting tool insertsresearch materials for extreme environments

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	214.9	GPa	DFT
↳	206.6	GPa	DFT · OptB88vdW
↳	214.9	GPa	DFT · PBE
Elastic Compliance Tensor(Sij)	Matrix (redacted)	1/GPa	DFT · PBE
Elastic Anisotropy(AU)	1.518	-	DFT · PBE
Elastic Stiffness Tensor(Cij)	Matrix (redacted)	Pa	DFT · PBE
Poisson's Ratio(ν)2 entries	0.3400	-	DFT · OptB88vdW
↳	0.3223	-	DFT · PBE
Shear Modulus(G)3 entries	86.63	GPa	DFT
↳	84.15	GPa	DFT · OptB88vdW
↳	86.63	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)	12.40	kg/m³	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	0.00210	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00205	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	25.66	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	25.21	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)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)3 entries	-0.6675	eV/atom	Measured
↳	-0.6050	eV/atom	DFT · OptB88vdW
↳	-0.6643 range -0.6675–-0.6612median of 2 measurements	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.

SiIr

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental