Coating of hydroxyapatite on various substrates via hydrothermal reactionsof Ca(edta)(2-) and phosphate

Citation
Y. Fujishiro et al., Coating of hydroxyapatite on various substrates via hydrothermal reactionsof Ca(edta)(2-) and phosphate, J MAT S-M M, 12(4), 2001, pp. 333-337
Citations number
12
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Multidisciplinary
Journal title
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE
ISSN journal
0957-4530 → ACNP
Volume
12
Issue
4
Year of publication
2001
Pages
333 - 337
Database
ISI
SICI code
0957-4530(200104)12:4<333:COHOVS>2.0.ZU;2-R
Abstract
Hydroxyapatite was coated on various substrates such as 12 mol % ceria-dope d tetragonal zirconia (12Ce-TZP), 3 mol % yttria-doped tetragonal zirconia (3Y-TZP), alumina, monetite coated titanium (Ti/CaHPO4) and calcium titanat e coated titanium (Ti/CaTiO3) via hydrothermal reactions of Ca(edta)(2-) an d 0.05 M NaH2PO4 at initial pH 6 and 160-200 degreesC for 0.5-6 h. Rod-like particles of hydroxyapatite precipitated to form film on the substrates ab ove 160 degreesC. The morphology of the film changed significantly dependin g on the characteristics of substrate, i.e. hydroxyapatite entirely coated the surfaces of 12Ce-TZP, Ti/CaHPO4 and Ti/CaTiO3 plates, but sparsely depo sited on 3Y-TZP and Al2O3 plates. Film thickness increased with time (ca. 2 0 and 90 mum on 12Ce-TZP plates for 0.5 and 6 h, respectively, at pH 6 and 200 degreesC). The adhesive strength of the film for the substrate was in t he order, 12Ce-TZP/hydroxyapatite(28 MPa) > Ti/CaTiO3/hydroxyapatite (22 MP a) > Ti/CaHPO4/hydroxyapatite (9 MPa). (C) 2001 Kluwer Academic Publishers.