title: A simple method to prepare calcium phosphate coatings on Ti6Al4V.
abstract: A two-step chemical treatment followed by immersion in a supersaturated calcification solution (SCS) was found to be a simple way to prepare calcium phosphate (Ca-P) coatings on Ti6Al4V. The Ca-P deposition on the treated metallic surfaces could be accelerated by employing a pre-calcification (Pre-Ca) procedure prior to immersion in SCS. The two-step treatment was performed by etching the metallic plates with a mixture of HCl and H2SO4 followed by ageing in boiling diluted NaOH solution at 140 degrees C. Pre-Ca was carried out by incubating the two-step treated plates in Na2HPO4 solution and then in saturated Ca(OH)2 solution. The formation of a bioactive microporous surface oxide layer on Ti6Al4V by the two-step treatment was most probably responsible for the induction of Ca-P precipitation. The deposition rates and compositions of Ca-P coatings in two different SCSs were investigated by means of scanning electron microscopy, X-ray diffraction and infrared spectrophotometry.
authors.affiliation: Biomaterials Research Group, Leiden University, Bilthoven, The Netherlands.
authors.forename: H B
authors.initials: HB
authors.lastname: Wen
authors.forename: J R
authors.initials: JR
authors.lastname: De Wijn
authors.forename: Q
authors.initials: Q
authors.lastname: Liu
authors.forename: K
authors.initials: K
authors.lastname: De Groot
authors.forename: F Z
authors.initials: FZ
authors.lastname: Cui