Journal of Advanced Materials and Technologies

Journal of Advanced Materials and Technologies

Effect of Precursor Concentration on the Microstructure of Aluminum Oxide Coating Made through the Solution Precursor Plasma Spray Process

Document Type : Original Reaearch Article

Authors
Amir Kebriyaei 1
Mohammad Reza Rahimipour 2
Mansour Razavi 3
Atabak Alizadeh Herfati 4
1 Ph. D. Student, Department of Ceramic, Materials and Energy Research Center (MERC), MeshkinDasht, Alborz, Iran
2 Professor, Department of Ceramic, Materials and Energy Research Center (MERC), MeshkinDasht, Alborz, Iran
3 Associate Professor, Department of Ceramic, Materials and Energy Research Center (MERC), MeshkinDasht, Alborz, Iran
4 M. Sc., Materials and Metallurgy Engineerin College, University of Tehran, Tehran, Tehran, Iran
10.30501/jamt.2021.264619.1147
Abstract
In this research, the equipment required to produce ceramic coatings based on Solution Precursor Plasma Spray (SPPS) method was first identified and manufactured by exploring the relevant sources and contained information. Then, aluminum oxide coating was applied to the substrate with MCrAlY bond coat using the set-up. Further, a solution of aluminum sulphate with the concentrations of 0.5 and 1 molar was prepared and used as a precursor injected into the plasma plume in order to evaluate the effect of the precursor concentration on the coating microstructure. The results revealed that the alumina coating obtained from the more diluted precursor had a more porous structure than its counterpart, and its microstructure contained some bubble-like fractured shells as well as small spherical particles. However, the coating obtained from the precursor with higher concentration was found to be denser mainly due to the phenomenon occurring during the deposition through the SPPS process. The XRD analysis yielded similar results for both coatings where the α-Al2O3 was the predominant phase in the coating.
Keywords
SPPS
Set Up
Alumina
Fractured Shells
Precursor

Subjects

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Journal of Advanced Materials and Technologies
Volume 11, Issue 1
Spring 2022
Pages 1-12

  • Receive Date 04 January 2021
  • Revise Date 04 April 2021
  • Accept Date 11 April 2021