Aluminum composites strengthened with ceramics have superior mechanical and thermal properties when compared to monolithic aluminum alloys. But poor wettability and undesirable chemical reactions are a major problem while fabricating such composites. In this study, an attempt is made to enhance wettability via metal coated ceramic particles. Silicon carbide (SiC) particles were coated with nickel-phosphorous (Ni–P) layer through electroless nickel-phosphorous plating method. The incorporation of plated powders with different reinforcement levels, specifically 5, 10, and 15 weight percent, is utilized to create Aluminum reinforced Ni–P plated SiC composites named as Al/Ni-PSiC and comparisons are drawn with pure Al and Al/SiC sintered composites. To probe the surface and the interface region, techniques such as SEM, EDS spectra, and X-ray diffraction (XRD) are utilized effectively. XRD is employed to determine the presence of any intermetallic compounds and potential contaminants. Mechanical studies, including hardness, ultimate tensile strength (UTS), and yield strength (YS), have been noted to rise with the rising content of Ni–P plated SiC. Ni–P plating is found favorable for avoiding agglomeration, ensuring uniform dispersion, less interaction with aluminum to advance any intermetallic compounds like Al4C3 phase.

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Microstructural and Mechanical Behavior of Al/Ni-PSiC Composites Fabricated by Powder Metallurgy Technique

  • Haripriyani Arava,
  • Shoba Chintada,
  • Siva Prasad Dora,
  • S. V. S. Sarath Chandra Kollabathini

摘要

Aluminum composites strengthened with ceramics have superior mechanical and thermal properties when compared to monolithic aluminum alloys. But poor wettability and undesirable chemical reactions are a major problem while fabricating such composites. In this study, an attempt is made to enhance wettability via metal coated ceramic particles. Silicon carbide (SiC) particles were coated with nickel-phosphorous (Ni–P) layer through electroless nickel-phosphorous plating method. The incorporation of plated powders with different reinforcement levels, specifically 5, 10, and 15 weight percent, is utilized to create Aluminum reinforced Ni–P plated SiC composites named as Al/Ni-PSiC and comparisons are drawn with pure Al and Al/SiC sintered composites. To probe the surface and the interface region, techniques such as SEM, EDS spectra, and X-ray diffraction (XRD) are utilized effectively. XRD is employed to determine the presence of any intermetallic compounds and potential contaminants. Mechanical studies, including hardness, ultimate tensile strength (UTS), and yield strength (YS), have been noted to rise with the rising content of Ni–P plated SiC. Ni–P plating is found favorable for avoiding agglomeration, ensuring uniform dispersion, less interaction with aluminum to advance any intermetallic compounds like Al4C3 phase.