The Effect of SiC in NiCrBSi-SiC Composite Coating on the Microstructure, Hardness, and Oxidation Resistance

Authors

  • Suwarno Suwarno Departemen Teknik Mesin Institut Teknologi Sepuluh Nopember
  • Dhio Ndaru Nugroho Departemen Teknik Mesin Institut Teknologi Sepuluh Nopember
  • Fajar Yudanto Departemen Teknik Mesin Institut Teknologi Sepuluh Nopember
  • Budi Prawara Lembaga Ilmu Pengetahuan Indonesia Pusat Penelitian Elektronika dan Telekomunikasi

DOI:

https://doi.org/10.21776/ub.jrm.2021.012.03.8

Keywords:

Carbon Steel, Coating, HVOF, NiCrBSi, SiC, Oxidation Resistance

Abstract

Many industrial parts degrade, which reduces plant reliability. Waterwall tube is part of the circulating fluidized bed (CFB) boiler that often degrades caused by the bed materials’ erosion. Therefore it requires a material with resistance to corrosion, abrasion, and high oxidation and economically feasible. One of the solutions is to coat the tube with hard ceramic materials by using thermal spraying. In this present work, composites of NiCrBSi-SiC were used to coat low carbon steel in order to study the possibility of used in boiler application.  The coating process was carried out using the high-velocity oxygen fuel (HVOF). The amount of SiC was varied from 0% to 40% SiC to study their effect on coating properties. Then microstructure examination was done using an optical microscope on the surface with a cross-section to see the coating results in the form of density, porosity, and the bond between the layer and the substrate. Hardness testing with the Vickers method was carried out on the cross-section to determine the hardness value of the coating. The oxidation test is carried out to determine the oxidation resistance of the coating at high temperatures. Results show that the addition of SiC will increase the hardness and oxidation resistance. The porosity that appears is influenced by the SiC powder that does not melt entirely during the coating process due to differences in particle size. The amount of porosity will also affect the oxidation resistance of the coating.

Author Biography

Suwarno Suwarno, Departemen Teknik Mesin Institut Teknologi Sepuluh Nopember

Assistant Professor,Departemen Teknik MesinInstitut Teknologi Sepuluh Nopember (ITS)Surabaya

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Published

2022-01-08

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