Effect of Deposition Time on the Morphological Features and Structure of DLC Coatings on Aluminuim-T6 by PACVD
Subject Areas : micro and nano mechanics
seyed mohammad mahdi shafiei
1
(
Department of Mechanical Engineering,
West Tehran Branch, Islamic Azad University, Tehran, Iran
Department of Mechanical Engineering,
Roudehen Branch, Islamic Azad University, Tehran, Iran
)
Hamed raeiesifard
2
(
Department of Mechanical Engineering,
West Tehran Branch, Islamic Azad University, Tehran, Iran
)
kameleh Jafari
3
(
Department of Art and Architecture,
West Tehran Branch, Islamic Azad University, Tehran, Iran
)
Keywords: Deposition time, PACVD, Tribology, DLC, Coating,
Abstract :
Diamond like Carbon (DLC) was deposited on aluminum substrate using Plasma Assisted Chemical Vapor Deposition (PACVD) route. Spattering, the surface was activated before deposition for increasing adhesion. Deposition time was varied from 60 minutes to 5 hours. Deposit was characterized using with grazing incidence X-ray diffraction and atomic force microscope. The mechanical property was measured using microhardness and roughness tester. The analysis showed that the deposit consisted of columnar growth of submicron and micron meter scale. Compared to substrate material, deposit showed higher hardness and roughness. These results show that growth of DLC layer includes three stages. The first stage is primary growth of nuclei, and then these nuclei join together in second stage. In third stage, secondary growth of these nuclei happens.