Open Access
Review
Table 1.
Structure, mechanical and thermal properties of some hard coating materials (Ref. [16] and references therein).
| Material | Hardness (kg mm−2) | Young’s modulus (kN mm−2) | Thermal expansion coefficient (μm/m K−1) | Thermal conductivity (W/mK) | Melting point or decomposition temperature (°C) |
|---|---|---|---|---|---|
| TiN | 2000 < 3680 | 440 | 9.35 | 20–28 | 2949 |
| TiB2 | 3370 | 480 | 8.0 | 25 | 2900 |
| VN | 1500 | 460 | 8.1 | 11.3 | 2177 |
| ZrN | 1500 | 510 | 7.2 | 20.5 | 2982 |
| CrN | 1100 | 400 | 2.3–3.5 | 10.8 | 1500 |
| Cr3C2 | 1300 | 400 | 10.3 | n.a. | 1810 |
| Al2O3 | 4000 | 400 | 9.0 | 25–30 | 2300 |
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