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Radio frequency (RF) suspension plasma sprayed ultra-fine hydroxyapatite (HA)/zirconia composite powders

Paper ID Volume ID Publish Year Pages File Format Full-Text
13488 859 2003 11 PDF Available
Title
Radio frequency (RF) suspension plasma sprayed ultra-fine hydroxyapatite (HA)/zirconia composite powders
Abstract

Ultra-fine hydroxyapatite (HA)/ZrO2 composite powders was synthesised by radio frequency (RF) induction suspension plasma spray. A wet suspension of HA/ZrO2 was employed as feedstock. The suspension was injected axially into the RF plasma to produce the nano-composite powders, which were subsequently accumulated in cyclone collectors. The particle size and morphology was resolved by using the Zeta potential nano-particle size analyser, scanning electron microscopy, transmission electron microscopy, field emission microscopy techniques. The phase composition, phase concentration, and, molecular structure of the powders were characterised using differential scanning calorimetry, Fourier transform infra-red and X-ray diffractometry with quantitative phase analysis empowered by the Rietveld method. Results indicated that nano-size, spherical HA/ZrO2 composite powders were produced with varying morphological features that depend on the thermal treatment. Calcium zirconate (CaZrO3) was produced as a byproduct whose biocompatibility is not well documented. Results also showed that the HA decomposed into α and β-TCP due to decreasing Ca/P ratio with the formation of CaZrO3.

Keywords
Hydroxyapatite; Zirconia; Calcium Zirconate; Nano-composites; RF plasma spraying
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Radio frequency (RF) suspension plasma sprayed ultra-fine hydroxyapatite (HA)/zirconia composite powders
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 24, Issue 15, July 2003, Pages 2611–2621
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us