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Fig. 12.

Wear of TiCN coatings as an average of the maximum friction track depth after 100 cycles of movement
Material | Wear (μm) | Confidence interval |
---|---|---|
TiC | 4.64 | ±0.58 |
TiN | 3.05 | ±0.17 |
TiCN | 5.65 | ±0.38 |
Surface roughness parameters (ISO 25178) of TiCN coatings and the steel substrate before and after friction tests
Material | Average values of surface roughness parameters before friction tests | |||||||
---|---|---|---|---|---|---|---|---|
Sa | Sq | Sz | Ssk | Sku | Sp | Sv | ||
Coating | TiC | 0.508 | 0.592 | 2.548 | 0.164 | 2.018 | 1.375 | 1.173 |
TiN | 0.278 | 0.327 | 1.946 | 0.027 | 2.151 | 0.763 | 1.183 | |
TiCN | 0.251 | 0.309 | 2.317 | −0.797 | 6.745 | 0.666 | 1.651 | |
Substrate | AISI 304 steel | 0.567 | 0.680 | 3.585 | 0.129 | 2.261 | 1.917 | 1.667 |
The average coefficient of friction for the tested coatings and the confidence intervals for the initial (Cycle 1–20) and final friction period (Cycle 90–100)
Material | Coefficient of friction | Confidence interval | Coefficient of friction | Confidence interval | |
---|---|---|---|---|---|
Cycle: 1–20 | Cycle: 90–100 | ||||
Coatings | TiC | 0.122 | ±0.003 | 0.143 | ±0.002 |
TiN | 0.165 | ±0.001 | 0.168 | ±0.001 | |
TiCN | 0.145 | ±0.002 | 0.166 | ±0.002 | |
Substrate | AISI 304 steel | 0.139 | ±0.002 | 0.152 | ±0.002 |
The flow rate of the working gases during the deposition of TiCN coatings on the steel substrate
Material | Flow rate (×10−3 m3/h) | |||
---|---|---|---|---|
Ar | N2 | C2H2 | ||
Coating | TiC | 1.1 | - | 0.47 |
TiN | 1.1 | 0.45 | - | |
TiCN | 1.35 | 0.225 | 0.225 |