Advanced Microstructural Study of Suspension Plasma Sprayed Hydroxyapatite Coatings

Fine, home-synthesized, hydroxyapatite powder was formulated with water and alcohol to obtain a suspension used to plasma spray coatings onto a titanium substrate. The deposition process was optimized using statistical design of 2 n experiments with two variables: spray distance and electric power i...

Full description

Saved in:
Bibliographic Details
Published in:Journal of thermal spray technology 2010-03, Vol.19 (3), p.657-664
Main Authors: Podlesak, Harry, Pawlowski, Lech, d’Haese, Romain, Laureyns, Jacky, Lampke, Thomas, Bellayer, Severine
Format: Article
Language:English
Subjects:
Agglomeration
Analytical Chemistry
Applied sciences
Calcium oxide
Characterization and Evaluation of Materials
Chemical Sciences
Chemistry and Materials Science
Coatings
Cold regions
Corrosion and Coatings
Crystals
Deposition
Electric power
Electron probes
Exact sciences and technology
Hydroxyapatite
Machines
Manufacturing
Materials Science
Metals. Metallurgy
Microstructure
Nonmetallic coatings
or physical chemistry
Peer Reviewed
Processes
Production techniques
Sprayers
Sprays
Surface treatment
Surfaces and Interfaces
Theoretical and
Thin Films
Tribology
X-ray diffraction
X-ray spectroscopy
X-rays
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Fine, home-synthesized, hydroxyapatite powder was formulated with water and alcohol to obtain a suspension used to plasma spray coatings onto a titanium substrate. The deposition process was optimized using statistical design of 2 n experiments with two variables: spray distance and electric power input to plasma. X-ray diffraction (XRD) was used to determine quantitatively the phase composition of obtained deposits. Raman microscopy and electron probe microanalysis (EPMA) enabled localization of the phases in different positions of the coating cross sections. Transmission electron microscopic (TEM) study associated with energy-dispersive x-ray spectroscopy (EDS) enabled visualization and analysis of a two-zone microstructure. One zone contained crystals of hydroxyapatite, tetracalcium phosphate, and a phase rich in calcium oxide. This zone included lamellas, usually observed in thermally sprayed coatings. The other zone contained fine hydroxyapatite grains that correspond to nanometric and submicrometric solids from the suspension that were agglomerated and sintered in the cold regions of plasma jet and on the substrate.
ISSN:1059-9630
1544-1016
DOI:10.1007/s11666-010-9471-6