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<p>Current investigation aims to assess the existence of synergistic action among a novel combination of Ag (10 wt pct), Ni-doped rGO (1 wt pct), and Ni-doped <i>h</i>-BN (2, 4, 6, and 8 wt pct) in spark plasma sintered Ni alloy-based self-lubricating nanocomposites sliding against Si<sub>3</sub>N<sub>4</sub> ball at constant load of 5 N and a fixed sliding speed of 0.5 m/s over wide range of temperature, <i>i.e.</i>, room temperature (RT) to 800&#xa0;°C apart from determining the optimum amount of Ni-doped <i>h-</i>BN in accomplishing low friction. The composite containing 8 wt pct <i>h</i>-BN showed the lowest coefficient of friction (~ 0.17–0.27) and wear rate (~5.1–6.5 × 10<sup>−5</sup> mm<sup>3</sup>/Nm) at all the temperatures due to relatively larger amount of <i>h</i>-BN and the synergistic action among Ag, rGO, and <i>h</i>-BN. The synergistic action among these solid lubricants offers an opportunity to synthesize Ni alloy-based self-lubricating nanocomposites for extreme temperature conditions<b>.</b></p>

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Assessing Lubrication Potential of a Novel Combination of Ag/h-BN-Ni/rGO-Ni from Room Temperature to 800 °C in Nickel Alloy

  • 期刊论文

  • 发表日期：

    2025年6月4日

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  • Smita Gupta,
  • Rajnesh Tyagi,
  • P. K. Jain,
  • O. P. Khatri

摘要

Current investigation aims to assess the existence of synergistic action among a novel combination of Ag (10 wt pct), Ni-doped rGO (1 wt pct), and Ni-doped h-BN (2, 4, 6, and 8 wt pct) in spark plasma sintered Ni alloy-based self-lubricating nanocomposites sliding against Si3N4 ball at constant load of 5 N and a fixed sliding speed of 0.5 m/s over wide range of temperature, i.e., room temperature (RT) to 800 °C apart from determining the optimum amount of Ni-doped h-BN in accomplishing low friction. The composite containing 8 wt pct h-BN showed the lowest coefficient of friction (~ 0.17–0.27) and wear rate (~5.1–6.5 × 10−5 mm3/Nm) at all the temperatures due to relatively larger amount of h-BN and the synergistic action among Ag, rGO, and h-BN. The synergistic action among these solid lubricants offers an opportunity to synthesize Ni alloy-based self-lubricating nanocomposites for extreme temperature conditions.