Titanium nitride
Titanium nitride (TiN; sometimes known as tinite) is an extremely hard ceramic material, often used as a physical vapor deposition (PVD) coating on titanium alloys, steel, carbide, and aluminium components to improve the substrate's surface properties.
| Names | |
|---|---|
| IUPAC name
Titanium nitride | |
| Other names
Titanium(III) nitride | |
| Identifiers | |
3D model (JSmol) |
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| ECHA InfoCard | 100.042.819 |
| EC Number |
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PubChem CID |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
| TiN | |
| Molar mass | 61.874 g/mol |
| Appearance | Brown as a pure solid, coating of golden color |
| Odor | Odorless |
| Density | 5.21 g/cm3 |
| Melting point | 2,947 °C (5,337 °F; 3,220 K) |
| insoluble | |
| +38×10−6 emu/mol | |
| Thermal conductivity | 29 W/(m·K) (323 K) |
| Structure | |
| Face-centered cubic (FCC), cF8 | |
| Fm3m, No. 225 | |
a = 0.4241 nm | |
Formula units (Z) |
4 |
| Octahedral | |
| Thermochemistry | |
Heat capacity (C) |
24 J/(K·mol) (500 K) |
Std molar entropy (S⦵298) |
−95.7 J/(K·mol) |
Std enthalpy of formation (ΔfH⦵298) |
−336 kJ/mol |
| Related compounds | |
Related coating |
Titanium aluminum nitride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |
Applied as a thin coating, TiN is used to harden and protect cutting and sliding surfaces, for decorative purposes (for its golden appearance), and as a non-toxic exterior for medical implants. In most applications a coating of less than 5 micrometres (0.00020 in) is applied.
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