Influences of Heating Condition and Substrate-Surface Roughness on the Characteristics of Sol-Gel-Derived Hydroxyapatite Coatings

  • Changkook You
  • Sunho Oh
  • Sukyoung Kim


A prepared transparent HA solution was coated on Ti6Al4V substrates by a spin-coating technique. The crystallization of the sol-gel-derived HA coated on the metallic substrates could be done at relatively low firing temperatures (as low as 600°C). The characteristics of the HA-coated layer were dependent on the surface roughness of substrates and heating conditions such as firing temperature, holding time, heating rate, and atmosphere. The heat treatment at a slow heating rate (<2°C/min.) and a long heating time (>10 hrs) at 600°C in air produced the uniform surface and improved the crystallinity. The HA layer coated on 20 μm grit-blasted substates was more uniform and had fever cracks after firing, compared with that coated on 100 μm grit-blasted rougher substrates.

sol-gel hydroxyapatite coating thin film heating surface roughness bioactive 


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Copyright information

© Kluwer Academic Publishers 2001

Authors and Affiliations

  • Changkook You
    • 1
  • Sunho Oh
    • 1
  • Sukyoung Kim
    • 1
  1. 1.School of Metallurgy and Materials EngineeringYeungnam UniversityKyongsan, KyongbukKorea

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