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Related Concept Videos

Porosity in Cement Paste01:18

Porosity in Cement Paste

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The porosity of concrete is a measure of the void spaces within its structure. These spaces impact its strength and durability significantly. When water and cement interact, a chemical reaction called hydration creates a semi-solid paste. This paste includes combined water, making up approximately 23% of the cement's dry mass, and gel water, which fills minuscule voids known as gel pores, accounting for about 28% of the cement gel volume.
The balance of water to cement in the mix is...
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Hydration of Cement01:24

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Hydration of cement is a chemical reaction between cement particles and water. This process occurs primarily through two mechanisms: through-solution and topochemical. In the through-solution process, anhydrous compounds dissolve into their constituents, hydrates form in the solution, and then precipitate from the supersaturated solution. The topochemical process involves solid-state reactions at the cement particle surface. The through-solution process dominates the topochemical process at the...
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Abrasion Resistance of Concrete01:23

Abrasion Resistance of Concrete

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Abrasion resistance is an essential characteristic of concrete that determines its durability and longevity under various wear conditions. Concrete surfaces are vulnerable to different types of abrasion. For instance, surfaces may wear down due to the constant movement of vehicles or be eroded by solids carried in water, as seen in concrete canal linings. Specific tests are conducted to measure the abrasion resistance of concrete.
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Fineness of Cement01:15

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The fineness of cement directly influences the rate of hydration, as the hydration begins at the surface of the cement particles. In addition to hydration, the fineness of cement is vital for various properties of concrete including workability, gypsum requirement, and long-term behavior. The fineness of cement is represented in terms of the specific surface of cement which is typically measured in square meters per kilogram, with several methods available for this determination.
Direct...
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Selective Area Modification of Silicon Surface Wettability by Pulsed UV Laser Irradiation in Liquid Environment
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Wettability-Oriented Laser Microgrooving Process on Cemented Carbide Surface.

Jing Ni1, Xianle Huang1, Zhen Zhang1

  • 1School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China.

Materials (Basel, Switzerland)
|July 27, 2024
PubMed
Summary
This summary is machine-generated.

Laser parameters precisely control surface micro-texture accuracy and wettability on cemented carbide. Optimized laser settings yield high texture integrity, enhancing oleophobicity and spreading properties for improved material performance.

Keywords:
cemented carbidegroove texturelaser scanningwettability

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Area of Science:

  • Materials Science
  • Surface Engineering
  • Manufacturing Technology

Background:

  • Surface micro-texture is known to improve wettability and reduce wear in cutting tools.
  • Limited research exists on the specific impact of laser parameters on surface texture dimensional accuracy and wettability.

Purpose of the Study:

  • To investigate the influence of laser parameters on the dimensional accuracy of arrayed groove textures on WC/Co cemented carbide.
  • To evaluate the effect of laser-induced surface texture on wettability and oleophobicity.

Main Methods:

  • Utilized Nd: YAG laser to create arrayed groove textures on WC/Co cemented carbide.
  • Employed microscopic observation and simulation to assess surface topography and texture accuracy.
  • Applied solid droplet method and X-ray Photoelectron Spectroscopy (XPS) analysis to study surface wettability.

Main Results:

  • Achieved a groove width error of 4.7% relative to the laser spot diameter with specific laser parameters (passes < 5, power ~16 W, speed 100-150 mm/s, frequency 30 kHz).
  • Demonstrated that increased surface roughness, resulting from accurate texturing, enhances oleophobicity.
  • Observed improved oleophobic and spreading properties on surfaces with high texture accuracy and integrity.

Conclusions:

  • Precise regulation of laser parameters is critical for achieving high dimensional accuracy and integrity of surface micro-textures.
  • Optimized surface texture significantly enhances oleophobicity and wettability, with implications for advanced material applications.