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<p>Nd<sub>2</sub>Hf<sub>1.6</sub>Zr<sub>0.4</sub>O<sub>7</sub> nanomaterial tuned by the sol–gel route is deposited utilizing the plasma spray coating technique on single-cylinder diesel engine piston. High-resolution transmission electron microscopy (HRTEM) analysis and selected area electron diffraction (SAED) patterns demonstrated the presence of crystalline pyrochlore-type structure in the nanomaterial. Lattice fringe mismatches and dislocations suggest the presence of strain-induced distortions in the structure. The coating has been developed with an optimized thickness of 450&#xa0;μm. The performance and emissions were evaluated, and results were compared between the standard engine and the Nd<sub>2</sub>Hf<sub>1.6</sub>Zr<sub>0.4</sub>O<sub>7</sub>-coated engine. The coated engine demonstrated a 7.9% decrease in brake-specific fuel consumption (BSFC) and a 5.6% enhancement in brake thermal efficiency (BTE) relative to the uncoated engine. Emission analysis indicated a 19.8% decrease in carbon monoxide emissions; however, nitrogen oxide (NOx) emissions experienced a 23.3% increase under high-load conditions. Spectroscopic analyses revealed reduced levels of carbonyl and aromatic groups in the exhaust of the coated engine. The findings highlight the potential of Nd<sub>2</sub>Hf<sub>1.6</sub>Zr<sub>0.4</sub>O<sub>7</sub> nanomaterial as a novel material for improving engine performance.</p>

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Effect of Nanostructured Nd2Hf1.6Zr0.4O7 Thermal Barrier Coating on Single-Cylinder Diesel Engine Emission and Performance

  • 期刊论文

  • 发表日期：

    2025年11月7日

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  • Jittu Varghese Kurian,
  • M. R. Radhakrishna Panicker,
  • P. A. Job,
  • R. Asaletha

摘要

Nd2Hf1.6Zr0.4O7 nanomaterial tuned by the sol–gel route is deposited utilizing the plasma spray coating technique on single-cylinder diesel engine piston. High-resolution transmission electron microscopy (HRTEM) analysis and selected area electron diffraction (SAED) patterns demonstrated the presence of crystalline pyrochlore-type structure in the nanomaterial. Lattice fringe mismatches and dislocations suggest the presence of strain-induced distortions in the structure. The coating has been developed with an optimized thickness of 450 μm. The performance and emissions were evaluated, and results were compared between the standard engine and the Nd2Hf1.6Zr0.4O7-coated engine. The coated engine demonstrated a 7.9% decrease in brake-specific fuel consumption (BSFC) and a 5.6% enhancement in brake thermal efficiency (BTE) relative to the uncoated engine. Emission analysis indicated a 19.8% decrease in carbon monoxide emissions; however, nitrogen oxide (NOx) emissions experienced a 23.3% increase under high-load conditions. Spectroscopic analyses revealed reduced levels of carbonyl and aromatic groups in the exhaust of the coated engine. The findings highlight the potential of Nd2Hf1.6Zr0.4O7 nanomaterial as a novel material for improving engine performance.