Quazi, M. M. and M., Ishak and Arslan, A. and M. Nasir, Bashir and Imran, Ali (2018) Scratch Adhesion and Wear Failure Characteristics of PVD multilayer CrTi/CrTiN Thin Film Ceramic Coating Deposited on AA7075-T6 Aerospace Alloy. Journal of Adhesion Science and Technology, 32 (6). pp. 625-641. ISSN 0169-4243. (Published)
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Abstract
This study highlights the scratch adhesion failure characterization and tribo-mechanical properties of physical vapor deposited (Cr, Ti) N coating on AA7075-T6 by using magnetron-sputtering technique. The surface morphology, microstructure and chemical composition of CrTi/CrTiN fim were inspected by an optical microscope, scanning electron microscope (SEM) incorporated with energy dispersive X-ray spectroscopy (EDX) in addition to focused ion beam milling. The coating to substrate critical load of about 1261 mN was obtained, by employing coating deposition parameters of; DC power (300 W, RF power (200 W)), temperature (300 °C) and nitrogen flw rate (6%). Failure adhesion characteristics exhibited initial arc-tensile cracking followed by chipping and spallation that led to complete coating failure at Lc3. The tribo-mechanical aspects were evaluated by a pinon-plate reciprocating testing unit, which showed a lower friction coeffient of 0.36 for CrTiN as compared with 0.43 for AA7075-T6. Subsequently, the wear depth was also reduced from 9.5 to 5.9 μm. It was revealed that the wear mechanism for AA7075-T6 was extensive deformation, abrasion and delamination, while the CrTiN exhibited slightly oxidative abrasive wear mode.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Magnetron sputtering; multilayered coating; aa7075-T6; crTin; scratch adhesion; tribological propertie |
| Subjects: | T Technology > TJ Mechanical engineering and machinery |
| Faculty/Division: | Faculty of Mechanical Engineering |
| Depositing User: | Dr Mahadzir Ishak @ Muhammad |
| Date Deposited: | 05 Feb 2018 03:55 |
| Last Modified: | 07 Mar 2018 06:41 |
| URI: | http://umpir.ump.edu.my/id/eprint/19229 |
| Download Statistic: | View Download Statistics |
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