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Motorsport valve train

Solution Coating material Coating technology Coating hardness HIT [GPa] Coefficient of friction (dry) vs. steel Max. service temp. [°C] Process temperature [°C]
TiN + a-C:H PACVD ~25-35 0.1 - 0.2 350 250 - 350
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a-C:H PACVD ~15-25 0.1 - 0.2 300 < 250
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