Investigating the characterization and damping effects in thermally sprayed Al ₂ O ₃ –40% TiO ₂ ceramic coating

Proceedings of the Institution of Mechanical Engineers Part E Journal of Process Mechanical Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: March 27, 2025

Ceramic coatings exhibit wear-resistant and damping characteristics that attenuate system vibrations, enhancing the overall surface performance of system. This investigation involved a ceramic coating (Al 2 O 3 –40%TiO ) deposition onto an SS 304 substrate through thermally flame spraying process. The study encompassed characterization morphology coated using field emission scanning electron microscope energy dispersive X-ray spectroscopy techniques. It was observed possesses dense structure with fully melted regions splat is uniformly distributed throughout cross-section. average measured microhardness roughness value 812 HV 2.55 µm, respectively. Furthermore, this sought to experimentally determine ratio for both uncoated substrates, it aimed evaluate their properties by analyzing amplitude fast Fourier transform plot. substrates are 0.021316 0.016557 logarithmic decrement method, whereas 0.021174 0.016244 half-power bandwidth material increases ratio, natural frequency, ultimately stiffness.

Language: Английский

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Pinecone-Structured ZnO microparticle coatings: A superhydrophobic approach for scale prevention on steel surfaces

Surface Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: May 20, 2025

This study presents the fabrication of pinecone-structured ZnO microparticles using a solvothermal method, which were subsequently applied to steel surfaces in combination with epoxy resin and perfluorosilane create superhydrophobic coating, termed FluoroZnO-Fe. The low surface energy micro-nano hierarchical structure prepared coating significantly enhance its water repellency reduces adhesion, resulting contact angle as high 161° sliding 2°. FluoroZnO-Fe demonstrated exceptional stability. Its remains above 150° below 5° even after treated mechanical abrasion, temperatures, exposure acidic alkaline environments. Importantly, when subjected heated circulating brine, exhibited remarkable anti-scaling properties, achieving 93.4% reduction scale deposition compared untreated bare steel. research highlights potential coatings for industrial applications where corrosion resistance self-cleaning properties are critical.

Language: Английский

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Experimental investigation of ductile iron water pipes with corrosion patches under bending and internal water pressure

Thin-Walled Structures, Journal Year: 2025, Volume and Issue: unknown, P. 113497 - 113497

Published: May 1, 2025

Language: Английский

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Analysis of the Impact of Portfolio Optimization Algorithms on Fund Performance

International Journal of Global Economics and Management, Journal Year: 2025, Volume and Issue: 6(3), P. 203 - 210

Published: April 26, 2025

This study explores the impact mechanism of portfolio optimization algorithms on fund performance. Based theoretical analysis and empirical research, it is found that significantly affect performance in three paths: return enhancement, risk control cost management, but effects are moderated by market environment algorithm type. Machine learning hybrid strategies exhibit better risk-adjusted returns, while traditional maintain value specific environments. The reveals face major challenges: model risk, contrariness, regulatory compliance, proposes coping based multi-scenario testing human-machine collaboration to provide guidance for practical application algorithms.

Language: Английский

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Review of protective coatings for pipelines

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 110, P. 656 - 663

Published: March 1, 2024

Language: Английский

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