Safitry Ramandhany, Eni Sugiarti, Djoko Triyono, Nurul Latifah, Agus Sukarto Wismogroho, Hubby Izzuddin, Ahmad Afandi, Jayadi, Muchammad Waliyyul Ahdi, Aunillah Putri El Nasihah, Masruroh, Kurotun Aini
The microstructural behavior of sintered Ni-based composites was evaluated to understand the performance of the composites in corrosive and abrasive environments. Ni–Cr–Si, Cr₃C₂–Ni–Cr, Ni–Cr–Ti, and Ni–Cr–Mo composites were synthesized using powder metallurgy at 1350 °C for 1 h. Field emission scanning electron microscopy (FE-SEM) equipped with electron diffraction (EDS) was utilized to analyze the microstructural evolution on both the surface and cross section after exposure. Phase identification was conducted using X-ray diffraction (XRD). Mechanical and tribological properties were assessed via surface hardness testing and erosion evaluation, respectively. Corrosion testing was performed under salt vapor conditions at 600 °C for 100 h, while erosion testing was conducted at a 90° impingement angle and 40 kPa erodent pressure. Among the composites, Ni–Cr–Mo demonstrated excellent resistance to corrosion and erosion, with values of 5.90 × 10–5 mm/y and 0.955 mg/g, respectively. It is attributed to dendritic nickel matrix and eutectic micro-Mo₂C, which also enhanced surface hardness to a value of 274 HV. In contrast, chromium carbide phases present in Ni–Cr–Si, Cr₃C₂-Ni–Cr, and Ni–Cr–Ti contributed to localized fracture and cracking. These results highlight Ni–Cr–Mo as a promising candidate for high-performance applications in harsh environments. © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2025.
Department of Physics, Faculty of Mathematics and Natural Sciences, University of Indonesia, Jl. Margonda Raya, Depok, 16424, Indonesia; Research Center for Advanced Materials, National Research and Innovation Agency (BRIN), Kawasan Puspiptek, Serpong, 15314, Indonesia; Department of Physics, Faculty of Mathematics and Natural Science, Brawijaya University, Jl. Veteran, Kota Malang, Lowokwaru, 65145, Indonesia
