Biomimetic whisker-shaped apatite coating of titanium powder.
Biomimetic apatite coatings on chemically modified titanium powder have been processed and the resulting coating layers evaluated in terms of morphology, composition and structure, using TF-XRD, XPS, SEM, TEM and FTIR analysis. After 7 days immersion in a simulated body fluid (SBF), nanometer-sized fine precipitates with an amorphous whisker-like phase and a Ca/P atomic ratio of 1.94 were obtained on the external surface of the titanium particles. When the immersion time in SBF was extended to 16 days, the coating layer consisted of the whisker-like nanostructured crystals of carbonated hydroxyapatite with a atomic ratio of 3; in such a case, a double coating layer was developed. The double layer could be divided into two regions and could be clearly distinguished: an inner dense region (approximately 200 nm in thickness) which may include hard agglomerated crystals and an outer less dense region (> 500 nm in thickness) in which crystals are loosely distributed.
Sim
Young Uk
YU
School of Materials Science and Engineering, Pusan National University, Pusan, 609-735, South Korea.
Kim
Jong Hee
JH
Yang
Tae Young
TY
Yoon
Seog Young
SY
Park
Hong Chae
HC
D001031:Apatites / Q000032:analysis / Q000737:chemistry*; D032701:Biomimetics; D001826:Body Fluids / Q000737:chemistry; D002254:Carbonates / Q000032:analysis; D017886:Durapatite / Q000032:analysis / Q000737:chemistry; D056951:Photoelectron Spectroscopy; D011208:Powders / Q000032:analysis; D017550:Spectroscopy, Fourier Transform Infrared; D014025:Titanium / Q000032:analysis / Q000737:chemistry*
D001031:Apatites; D002254:Carbonates; D011208:Powders; D017886:Durapatite; D014025:Titanium