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Related Concept Videos

Precipitation Gravimetry01:03

Precipitation Gravimetry

Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...

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Determining the Mechanical Strength of Ultra-Fine-Grained Metals
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Optimization of Process Parameters for Laser Remelting Nickel Coating.

Hengzheng Li1, Yangyang Li1, Rui Zhan1

  • 1School of Mechanical and Electronic Engineering, Suzhou University, Suzhou 234000, China.

Micromachines
|June 26, 2026
PubMed
Summary

Laser remelting enhances nickel coating wear resistance. Optimizing laser frequency and energy density improves surface properties, leading to superior roughness and durability for advanced material applications.

Keywords:
laser remeltingnickel platingsurface morphologywear resistance

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Area of Science:

  • Materials Science
  • Surface Engineering
  • Tribology

Background:

  • Nickel coatings offer good wear resistance.
  • Improving surface performance is crucial for demanding applications.
  • Laser remelting is a promising surface modification technique.

Purpose of the Study:

  • To enhance the surface properties of nickel coatings.
  • To investigate the effects of laser remelting parameters on nickel coatings.
  • To optimize laser remelting for improved wear resistance and surface characteristics.

Main Methods:

  • Pulsed laser remelting (1064 nm wavelength, 5 ms pulse duration, 2 mm spot diameter) was applied to nickel-based coatings on copper.
  • Systematic variation of laser frequency and energy density.
  • Characterization included surface morphology, microhardness, 3D topography, and wear resistance testing.

Main Results:

  • Laser frequency impacts surface properties by altering remelted spot overlap.
  • Laser energy density influences the remelting zone and surface characteristics.
  • Optimal parameters (10 Hz frequency, 165.87 J/mm² energy density) yielded favorable surface roughness and wear resistance.

Conclusions:

  • Laser remelting effectively modifies nickel coating surfaces.
  • Parameter optimization is key to achieving desired surface properties.
  • The study identified specific conditions for enhanced surface performance and wear resistance.