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<p>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&#xa0;°C for 1&#xa0;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&#xa0;°C for 100&#xa0;h, while erosion testing was conducted at a 90° impingement angle and 40&#xa0;kPa erodent pressure. Among the composites, Ni–Cr–Mo demonstrated excellent resistance to corrosion and erosion, with values of 5.90 × 10<sup>–5</sup>&#xa0;mm/y and 0.955&#xa0;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. </p>

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Chlorine-Induced High-Temperature Corrosion and Erosion Behavior of Sintered Ni–Cr Composites

  • 期刊论文

  • 发表日期：

    2025年7月10日

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  • 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

摘要

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.