Volume 38, Issue 2 (Journal of Advanced Materials-Summer 2019)                   jame 2019, 38(2): 35-53 | Back to browse issues page

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Barjesteh M, Zangeneh Madar K, Abbasi S M, Shirvani K. The Effect of Platinum Layer and Aluminizing Process on Surface Roughness of Coated Superalloy by Pt-Al. jame 2019; 38 (2) :35-53
URL: http://jame.iut.ac.ir/article-1-1000-en.html
1. Metallic Materials Research Center, Malek Ashtar University of Technology (MUT), Tehran, Iran. , zangenek@yahoo.com
Abstract:   (5097 Views)
In this study, the effect of platinum-aluminide coating parameters on surface roughness of nickel-based superalloy Rene®80 was evaluated. For this purpose, different thicknesses of Pt-layer (2, 4, 6 and 8µm) were plated on the Samples. Then diffusion aluminide coating in two types, high tempeature-low activity and low temperature-high activity was performed. The results of structural investigations by scanning electron microscope and X-Ray diffraction indicated a three-zone structure of coating in all thicknesses of platinum layer, as well as in the two methods of aluminizing. Surface roughness of coatings was measured in three steps: 1-after Pt plating, 2-after Pt diffusion, and 3-after aluminizing and final aging. The results showed that the thickness of Pt and the final thickness of the coating   directly affected the surface roughness. The minimum surface roughness was created by high temperature low activity with 2µ of Pt-layer (2.6μm) and the maximum of surface roughness was obtained in low-temperature high activity with 8µ of the Pt-layer (8.8 μm).
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Type of Study: Research | Subject: Surface engineering and coatings
Received: 2018/09/19 | Accepted: 2019/05/5 | Published: 2019/09/15

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