Bio-metals are the prominent class of materials for making bio-implants. Among the existing bio-metals, zinc is emerging as the best bio-compatible material. Cell adhesion and good surface properties are the primary requirements for the implants. Laser surface texturing (LST) is a unique technique of surface modification without any chemical change of the substrate surface. Moreover, LST has been a proven technique to enhance the wear resistance, coating adhesion, and cell adhesion. In this work, LST has been employed to investigate its effect on the wear resistance of the pure zinc substrate. Linear grooves were fabricated with two different pitches and laser scan speeds. Microstructures and the wear resistance were evaluated. Results revealed that increased texture pitch improves the wear debris entrapment capacity and restricts the wear losses. However, the textures fabricated with increased laser scan speed had limited wear debris entrapment capacity, which might be due to lower cavity depth.

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Wear Behavior of Laser Surface Textured Zinc

  • K. Kamalakannan,
  • Kannan Ganesa Balamurugan

摘要

Bio-metals are the prominent class of materials for making bio-implants. Among the existing bio-metals, zinc is emerging as the best bio-compatible material. Cell adhesion and good surface properties are the primary requirements for the implants. Laser surface texturing (LST) is a unique technique of surface modification without any chemical change of the substrate surface. Moreover, LST has been a proven technique to enhance the wear resistance, coating adhesion, and cell adhesion. In this work, LST has been employed to investigate its effect on the wear resistance of the pure zinc substrate. Linear grooves were fabricated with two different pitches and laser scan speeds. Microstructures and the wear resistance were evaluated. Results revealed that increased texture pitch improves the wear debris entrapment capacity and restricts the wear losses. However, the textures fabricated with increased laser scan speed had limited wear debris entrapment capacity, which might be due to lower cavity depth.