作者：Benjamin P. Reyngoud;Anne D. Barnett;Deborah J. Clearwater;Richard M. Hartshorn;Catherine M. Bishop;Benjamin P. Redwood;Ellen L. Palmer;Susan P. Krumdieck;

作者单位：Department of Mechanical Engineering, University of Canterbury Christchurch, 8041 (New Zealand);Department of Mechanical Engineering, University of Canterbury Christchurch, 8041 (New Zealand);Department of Mechanical Engineering, University of Canterbury

刊名：Chemical vapor deposition

ISSN：0948-1907

出版年：2010-01-05

卷：16

期：40911

起页：55

止页：63

分类号：TQ175

语种：英文

关键词：Biomaterials;Calcium lactate;Hydroxyapatite;PP-MOCVD;Trimethyl phosphate;

内容简介

Pulsed-pressure (PP) metal-organic(MO)CVD is used to deposit layers of calcium phosphate onto flat bio-medical grade titanium (Ti6Al4V) substrates. Inexpensive calcium lactate and trimethyl phosphate (TMP), combined in a methanol solution, forms the precursor.Arange of precursor mixtures is studied by thermogravimetric analysis (TGA) to assess reaction pathways. The surface topography, morphology, composition, and crystallinity are studied over a range of deposition temperatures and precursor concentrations. The resulting films are analyzed by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), Raman spectroscopy (RS), and micro-indentation. The films are continuous and the size of surface structures increases at higher temperatures and precursor concentration. The films consist of amorphous calcium phosphate in elemental Ca/P ratios similar to the standard bio-ceramic, hydroxyapatite (1.66).