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<p>In this study, Al–10% SiC–X% kaoline (X&#xa0;=&#xa0;0, 2, 4, 6, 8) hybrid aluminum metal matrix composites (HMMCs) were synthesized by the spark plasma sintering (SPS) technique. The fabricated HMMC samples were subjected to hardness and compression tests as per ASTM standards. Results revealed that a maximum compression strength of 290&#xa0;MPa was obtained for the Al–10% SiC–6% kaoline HMMC. The composite specimens corresponding to the maximum compression strength were subjected to tribological investigation under dry, oil, and nanofluids lubricating conditions. Nanofluid lubricants were prepared by incorporating SiC nanoparticles with weight percentages of 1, 1.5, and 2&#xa0;wt.% into soluble oil. The thermal conductivity and zeta potential values of these nanofluids were found to increase with increasing wt.% of SiC nanoparticles. Sliding wear tests under dry, oil, and SiC nanofluid lubrication conditions were conducted on a pin-on-disc tribometer at a 40&#xa0;N load and a sliding speed of 1500&#xa0;rpm for a duration of 180&#xa0;s. Results showed that there was a significant effect of the lubricating conditions (dry, oil (wet), and nanofluids) on the wear and coefficient of friction (COF) of the HMMC pin surface. Minimum wear of 119 µm and minimum COF of 0.11 were obtained for the nanofluid with 2&#xa0;wt.% SiC lubricating conditions. SEM analysis of worn surfaces under dry and soluble oil lubricating conditions revealed the presence of microcracks and delamination wear. However, worn surfaces with smooth grooves and the absence of microcracks were identified under nanofluid lubricating conditions.</p>

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Tribological investigation of spark plasma-sintered Al–SiC–kaoline hybrid composite under dry, oil, and nanofluids lubricating conditions

  • 期刊论文

  • 发表日期：

    2026年2月21日

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  • V. S. S. Venkatesh,
  • G. Mrudula,
  • Harjot Singh Gill,
  • Ashutosh Pattanaik,
  • Abhijit Bhowmik

摘要

In this study, Al–10% SiC–X% kaoline (X = 0, 2, 4, 6, 8) hybrid aluminum metal matrix composites (HMMCs) were synthesized by the spark plasma sintering (SPS) technique. The fabricated HMMC samples were subjected to hardness and compression tests as per ASTM standards. Results revealed that a maximum compression strength of 290 MPa was obtained for the Al–10% SiC–6% kaoline HMMC. The composite specimens corresponding to the maximum compression strength were subjected to tribological investigation under dry, oil, and nanofluids lubricating conditions. Nanofluid lubricants were prepared by incorporating SiC nanoparticles with weight percentages of 1, 1.5, and 2 wt.% into soluble oil. The thermal conductivity and zeta potential values of these nanofluids were found to increase with increasing wt.% of SiC nanoparticles. Sliding wear tests under dry, oil, and SiC nanofluid lubrication conditions were conducted on a pin-on-disc tribometer at a 40 N load and a sliding speed of 1500 rpm for a duration of 180 s. Results showed that there was a significant effect of the lubricating conditions (dry, oil (wet), and nanofluids) on the wear and coefficient of friction (COF) of the HMMC pin surface. Minimum wear of 119 µm and minimum COF of 0.11 were obtained for the nanofluid with 2 wt.% SiC lubricating conditions. SEM analysis of worn surfaces under dry and soluble oil lubricating conditions revealed the presence of microcracks and delamination wear. However, worn surfaces with smooth grooves and the absence of microcracks were identified under nanofluid lubricating conditions.