Functionally graded calcium phosphate coatings produced by ion beam sputtering/mixing deposition.
Ar+ ion beam sputtering/mixing deposition was used to produce thin calcium phosphate coatings on titanium substrate from hydroxyl-poly-calcium sodium phosphate (HPPA) and HPPA + Ti targets. Three types of coatings (one type of monolayer coating and two types of functionally graded coating) were manufactured. It was found that as-sputtered coatings were amorphous. No distinct hydroxyl band was observed in the FTIR spectra, but new absorption bands were determined for CO3(2-), which resulted during the deposition process. Compositional gradients from the surface to the interior (i.e. adjacent to the substrate) were achieved for the functionally graded coatings. Post-deposition heat treatment indicated that the bonding strength between the coating and the substrate was improved by the use of functionally graded structures.
Wang
C X
CX
Department of Dental Materials, College of Stomatology, West China University of Medical Sciences, Chengdu, Sichuan. mcxwang@ntu.edu.sg
Chen
Z Q
ZQ
Wang
M
M
Liu
Z Y
ZY
Wang
P L
PL
Zheng
S X
SX
D001128:Argon; D002130:Calcium Phosphates; D020099:Coated Materials, Biocompatible / Q000138:chemical synthesis* / Q000737:chemistry*; D007202:Indicators and Reagents; D007477:Ions; D007700:Kinetics; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D017348:Microscopy, Electron, Scanning Transmission; D017550:Spectroscopy, Fourier Transform Infrared; D014025:Titanium; D014961:X-Ray Diffraction
D002130:Calcium Phosphates; D020099:Coated Materials, Biocompatible; D007202:Indicators and Reagents; D007477:Ions; D001128:Argon; D014025:Titanium