| The Effect of Bias Voltage and Acetylene Gas Flow Rate
on the Wear Behavior of Diamond-like Carbon Coatings
on M2 High-Speed Steel |
Keshav Manjunath, Bharatish Achutarao*, Duggirala Venkata Naga Harish, Babu Ramappa,
Shanmukha Nagaraj
Pages : 295-306
DOI : 10.1080/0371750X.2023.2263484 |
| Abstract |
| This paper investigates the impact of bias voltage and acetylene flow rate on the
mechanical, structural, and scratch performance of diamond-like carbon (DLC) coated
high-speed steel (HSS) M2 commonly used in hydraulic vane pumps. The DLC coatings
were produced through plasma-enhanced chemical vapour deposition, with micro-Raman
spectroscopy used to analyze their structure via G-peak and D-peak measurements.
Results showed that DLC deposited at 350 V and 100 sccm demonstrated high hardness
(28.99 GPa) and modulus of elasticity (308.1 GPa), with the highest critical load of
167.246 mN indicating superior adhesion to the HSS M2 substrate at a higher bias
voltage and lower flow rate. The minimum wear rate of 3.02 ? 10–3 mm3/Nm was achieved
with a thinner DLC coating deposited at 350V bias voltage and 100 sccm acetylene
flow rate.
[Keywords: Diamond-like carbon, Bias voltage, Flow rate, Scratch, Plasma-enhanced
chemical vapour deposition, High speed steel] |
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