Raman Analysis of DLC Nanostructure Coating on AL 6061-T6 Made by DC Pulsed- PACVD

Journal of Modern Processes in Manufacturing and Production

دوره 11، شماره 3، آبان 2022، صفحه 35-40   

نوع مقاله: Research Paper

نویسندگان

Seyed Mohammad Mahdi Shafiei^{* 1، 2}؛ Hamed Raeiesifard¹

¹Department of Mechanical Engineering, West Tehran Branch, Islamic Azad University, Tehran, Iran

²Department of Mechanical Engineering, Roudehen Branch, Islamic Azad University, Tehran, Iran

چکیده

Plasma assisted chemical vapor deposition (PACVD) technique was used to make a diamond-like carbon (DLC) coating on the Aluminum 6061- T6 substrate. The deposition was carried out using CH4 as the process gas, at different temperatures, 250°C and 300°C with constant power and flow rate. Characterization technique Raman spectroscopy was used to characterize these samples. Raman analysis of DLC coatings at different temperatures is carried out in detail for two different excitation wavelengths i.e. 514 and 785 nm and, results are presented in the paper. Blue shifts were observed in both D and G peaks of the Raman spectrum with an increase in deposition temperature, which indicates the formation of compressive strain in high-temperature deposited DLC coatings. Dispersion in both D and G peaks is observed for different excitation wavelengths suggesting that the coating is hydrogenated DLC. The degree of hydrogenation of the DLC coating appears to decrease for the deposition temperature. Nano-indentation study shows a marginal increase in hardness with an increase in deposition temperature.

کلیدواژه‌ها

DLC؛ PACVD؛ Aluminum؛ Raman؛ Nano-indentation

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