SiIr
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
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)3 entries | 31,164.1 | ksi | — | ||
| ↳ | 31,164.1 | ksi | — | ||
| ↳ | 29,967.7 | ksi | — | ||
Elastic Compliance Tensor(Sij) | Matrix (redacted) | 1/GPa | — | ||
Elastic Anisotropy(AU) | 1.518 | - | — | ||
Elastic Stiffness Tensor(Cij) | Matrix (redacted) | ksi | — | ||
Poisson's Ratio(ν)2 entries | 0.3223 | - | — | ||
| ↳ | 0.3400 | - | — | ||
Shear Modulus(G)3 entries | 12,564.7 | ksi | — | ||
| ↳ | 12,564.7 | ksi | — | ||
| ↳ | 12,204.9 | ksi | — |
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.
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 0.4482 | lb/in³ | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 0.000 | eV | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Seebeck Coefficient(S) | 25.66 | µV/K | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.000 | eV/atom | — | ||
Formation Energy(ΔHf)3 entries | -0.6675 | eV/atom | — | ||
| ↳ | -0.6050 | eV/atom | — | ||
| ↳ | -0.6643 range -0.6675–-0.6612median of 2 measurements | eV/atom | — |
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.
Verified Unverified Low confidence (<80%) Link to source
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.