• Jason Lauzuardy Department of Metallurgical Engineering, Faculty of Mining and Petroleum Engineering, Institut Teknologi Bandung, Bandung 40132, Indonesia
  • Eddy Agus Basuki Department of Metallurgical Engineering, Faculty of Mining and Petroleum Engineering, Institut Teknologi Bandung, Bandung 40132, Indonesia
  • Erie Martides Research Center for Advanced Materials, National Research and Innovation Agency, Serpong 15314, Indonesia
  • Selly Septianissa Department of Mechanical Engineering, Faculty of Engineering, Widyatama University, Bandung 40125, Indonesia
  • Budi Prawara Research Center for Advanced Materials, National Research and Innovation Agency, Serpong 15314, Indonesia
  • Dedi Research Center for Electronics, National Research and Innovation Agency, Bandung 40135, Indonesia
  • Endro Junianto Research Center for Smart Mechatronics, National Research and Innovation Agency, Bandung 40135, Indonesia
  • Edy Riyanto Research Center for Advanced Materials, National Research and Innovation Agency, Serpong 15314, Indonesia
Keywords: termal-spray coating, high-velocity oxy-fuel coating, ceramic-metal material, Cr3C2–NiCr coating


With the goals of protecting boiler tubes from hostile surroundings, increasing thermal efficiency, and minimizing time losses from damage, thermal-spray coating methods for high-temperature operations were created. Ceramic-metal composite materials (e.g., Cr3C2-NiCr) are well known for protecting components from erosion decay in a high-temperature environment. In this investigation, the high-velocity oxy-fuel (HVOF) thermal-spray technique was employed to successfully deposit several variations of feedstocks containing Cr3C2-NiCr and NiCr powders onto a medium-carbon steel substrate, with and without filtering through a 400-mesh screen. Utilizing X-ray fluorescence (XRF), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD), the microstructure features of the deposited coatings were assessed. The experiment results demonstrate that the crystallite and grain sizes of the deposited coatings can be increased by reducing the powder size through a sifting process using a 400-mesh sieve. This procedure also resulted in a coating with a higher density and lower porosity. Furthermore, new compounds including Cr2O3 and MnCr2O4 were formed in the coating layers as indicated by the XRD spectra. These phenomena are in good agreement with the EDS mapping of Cr and O, which reveals highly similar distributions. Manganese was originally a part of the substrate composition. Manganese could diffuse rapidly across the Cr2O3 layer and form the MnCr2O4 compound, indicating the manganese diffusion from the substrate into the Cr3C2-NiCr coating. The formation of MnCr2O4 can be attributed to the prior emergence of the Cr2O3 compound.


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How to Cite
LauzuardyJ, Agus BasukiE, MartidesE, SeptianissaS, PrawaraB, Dedi, JuniantoE, Riyanto E. MICROSTRUCTURE CHARACTERISTICS OF Cr3C2-NiCr COATINGS DEPOSITED WITH THE HIGH-VELOCITY OXY-FUEL THERMAL-SPRAY TECHNIQUE. MatTech [Internet]. 2024Apr.2 [cited 2024May18];58(2):137–145. Available from: https://mater-tehnol.si/index.php/MatTech/article/view/869