Department of Mechanical Engineering, Islamic Azad University, Roudehen Branch Tehran, Iran

Subject Areas : Analytical and Numerical Methods in Mechanical Design

S.M.M.  Shafiei ¹ (Department of Mechanical Engineering, West Tehran Branch, Islamic Azad University, Tehran, Iran)
H.  Raeisifard ² (Department of Mechanical Engineering, Roudehen Branch, Islamic Azad University, Tehran, Iran)

Received: 2022-10-12 Accepted : 2022-10-12 Published : 2022-12-01

Keywords: nano, DLC, PACVD, Aluminum, Raman,

Abstract :

Plasma-assisted chemical vapor deposition method was used to construct a diamond-like carbon coating on aluminum substrate 6061-T6. Sedimentation was carried out using CH4 as a process gas at different temperatures of 250-300 Celsius with constant flow rate and power. Raman spectroscopy was used to describe these samples. Raman analysis of DLC coatings at different temperatures has been done in detail for two different wavelengths of stimulation of 514 and 785 nm and the results are shown in this paper. Peak changes were observed in both D and G peaks of Raman spectrum with increasing sediment temperature, indicating the formation of compressive strain in DLC coatings at high temperatures. Scattering is observed at both D and G peaks for different wavelengths of excitation, indicating that the DC coating is hydrogenated. It seems that the degree of hydrogenation of DLC coating decreases due to sediment temperature. The study of nano-indentation with increasing sediment temperature shows a marginal increase in hardness.

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