Mohamed Reza Zalani, Mohamed Suffian and S. N., Aqida and Izwan, Ismail (2016) Interface bonding of NiCrAlY coating on laser modified H13 tool steel surface. Applied Physics A: Materials Science and Processing, 122 (611). pp. 122-611. ISSN 09478396. (Published)
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Abstract
Bonding strength of thermal spray coatings depends on the interfacial adhesion between bond coat and substrate material. In this paper, NiCrAlY (Ni-164/211 Ni22 %Cr10 %Al1.0 %Y) coatings were developed on laser modified H13 tool steel surface using atmospheric plasma spray (APS). Different laser peak power, Pp, and duty cycle, DC, were investigated in order to improve the mechanical properties of H13 tool steel surface. The APS spraying parameters setting for coatings were set constant. The coating microstructure near the interface was analyzed using IM7000 inverted optical microscope. Interface bonding of NiCrAlY was investigated by interfacial indentation test (IIT) method using MMT-X7 Matsuzawa Hardness Tester Machine with Vickers indenter. Diffusion of atoms along NiCrAlY coating, laser modified and sub�strate layers was investigated by energy-dispersive X-ray spectroscopy (EDXS) using Hitachi Tabletop Microscope TM3030 Plus. Based on IIT method results, average interfacial toughness, Kavg, for reference sample was 2.15 MPa m1/2 compared to sample L1 range of Kavg from 6.02 to 6.96 MPa m1/2 and sample L2 range of Kavg from 2.47 to 3.46 MPa m1/2. Hence, according to Kavg, sample L1 has the highest interface bonding and is being laser modified at lower laser peak power, Pp, and higher duty cycle, DC, prior to coating. The EDXS analysis indicated the presence of Fe in the NiCrAlY coating layer and increased Ni and Cr composition in the laser modified layer. Atomic diffusion occurred in both coating and laser modified layers involved in Fe, Ni and Cr elements. These findings introduce enhancement of coating system by substrate surface modification to allow atomic diffusion.
| Item Type: | Article |
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| Additional Information: | Indexed by Scopus |
| Uncontrolled Keywords: | Bond coat; Thermally grow oxide; Atmospheric plasma spray; Interfacial toughness; Laser spot diameter |
| Subjects: | T Technology > TJ Mechanical engineering and machinery |
| Faculty/Division: | Faculty of Mechanical Engineering Centre of Excellence: Automotive Engineering Centre Centre of Excellence: Automotive Engineering Centre |
| Depositing User: | Mr. Mohamed Reza Zalani Mohamed Suffian |
| Date Deposited: | 14 Sep 2021 05:47 |
| Last Modified: | 14 Sep 2021 05:47 |
| URI: | http://umpir.ump.edu.my/id/eprint/32013 |
| Download Statistic: | View Download Statistics |
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