title: Crystallite orientation and anisotropic strains in thermally sprayed hydroxyapatite coatings.
abstract: Thermally sprayed hydroxyapatite powders and coatings have been studied using X-ray powder diffraction and scanning electron microscopy. Preferred orientation of the crystallites has been found on a number of coated plates using X-ray powder diffraction, and full profile fitting of the patterns from the extracted powders indicates anisotropically thermally strained crystallites. This is a result of rapid crystal regrowth and associated thermal gradients on deposition. Electron micrographs of some coatings show a consistent picture of columnar crystallites orientated perpendicular to the substrate surface.
authors.affiliation: Physics Division, School of Sciences, Staffordshire University, Stoke on Trent, UK.
authors.forename: C M
authors.initials: CM
authors.lastname: Roome
authors.forename: C D
authors.initials: CD
authors.lastname: Adam
mesh_terms: D016880:Anisotropy; D001672:Biocompatible Materials / Q000737:chemistry*; D003460:Crystallization; D017886:Durapatite / Q000737:chemistry*; D006361:Heating; D008855:Microscopy, Electron, Scanning; D011208:Powders; D014961:X-Ray Diffraction
chemical_list: D001672:Biocompatible Materials; D011208:Powders; D017886:Durapatite