Hydroxyapatite Coating On Magnesium Based Alloy For Bioimplant By Cold Spray Deposition Technique

In this study simple cold spray set up has been designed to coat AZ51 with hydroxyapatite. The details of the set up and design of the spray process has been presented. It was found that the qualities of hydroxyapatite coating were influenced by the heating temperature of magnesium substrate, sur...

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Main Author:	Abdullah, Che Wan NoorAkma
Format:	Thesis
Language:	English
Published:	2012
Subjects:	TA404 Composite materials
Online Access:	http://eprints.usm.my/36923/1/CHE_WAN_NOORAKMA_ABDULLAH_24_Pages.pdf
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id	my-usm-ep.36923
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spelling	my-usm-ep.369232019-04-12T05:26:24Z Hydroxyapatite Coating On Magnesium Based Alloy For Bioimplant By Cold Spray Deposition Technique 2012 Abdullah, Che Wan NoorAkma TA404 Composite materials In this study simple cold spray set up has been designed to coat AZ51 with hydroxyapatite. The details of the set up and design of the spray process has been presented. It was found that the qualities of hydroxyapatite coating were influenced by the heating temperature of magnesium substrate, surface roughness of magnesium substrate and also standoff distance. The coatings formed were compact and had good adherence to the substrate. The coating thickness varied between 20 to 30 micron meters. The chemical analysis identified the coatings as hydroxyapatite. Mechanical properties of the coatings were evaluated by nanoindentation test. The hardness and the elastic modulus of the coating were 0.1GPa and 9 GPa respectively. Further, the biocompatibility as well as biodegradation of the hydroxyapatite coated AZ51 along with uncoated AZ51 samples, were tested by subjecting them to in vitro test with simulated body fluid solutions. The inductively couple plasma optical emission spectroscopy and energy dispersive x-ray spectrometry analysis indicated that hydroxyapatite coating started dissolving after one day but showed signs of regeneration after 10 days of holding. Accelerated corrosion test in the 3.5% NaCl solution showed that the HAP coating remarkably protected the AZ51 magnesium substrate till 10 days. This continued till 21 days when most of the hydroxyapatite was replaced with magnesium hydroxide and at the end chloride ions were also detected on the surface indicating formation of magnesium chloride. 2012 Thesis http://eprints.usm.my/36923/ http://eprints.usm.my/36923/1/CHE_WAN_NOORAKMA_ABDULLAH_24_Pages.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Bahan dan Sumber Mineral
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	TA404 Composite materials
spellingShingle	TA404 Composite materials Abdullah, Che Wan NoorAkma Hydroxyapatite Coating On Magnesium Based Alloy For Bioimplant By Cold Spray Deposition Technique
description	In this study simple cold spray set up has been designed to coat AZ51 with hydroxyapatite. The details of the set up and design of the spray process has been presented. It was found that the qualities of hydroxyapatite coating were influenced by the heating temperature of magnesium substrate, surface roughness of magnesium substrate and also standoff distance. The coatings formed were compact and had good adherence to the substrate. The coating thickness varied between 20 to 30 micron meters. The chemical analysis identified the coatings as hydroxyapatite. Mechanical properties of the coatings were evaluated by nanoindentation test. The hardness and the elastic modulus of the coating were 0.1GPa and 9 GPa respectively. Further, the biocompatibility as well as biodegradation of the hydroxyapatite coated AZ51 along with uncoated AZ51 samples, were tested by subjecting them to in vitro test with simulated body fluid solutions. The inductively couple plasma optical emission spectroscopy and energy dispersive x-ray spectrometry analysis indicated that hydroxyapatite coating started dissolving after one day but showed signs of regeneration after 10 days of holding. Accelerated corrosion test in the 3.5% NaCl solution showed that the HAP coating remarkably protected the AZ51 magnesium substrate till 10 days. This continued till 21 days when most of the hydroxyapatite was replaced with magnesium hydroxide and at the end chloride ions were also detected on the surface indicating formation of magnesium chloride.
format	Thesis
qualification_level	Master's degree
author	Abdullah, Che Wan NoorAkma
author_facet	Abdullah, Che Wan NoorAkma
author_sort	Abdullah, Che Wan NoorAkma
title	Hydroxyapatite Coating On Magnesium Based Alloy For Bioimplant By Cold Spray Deposition Technique
title_short	Hydroxyapatite Coating On Magnesium Based Alloy For Bioimplant By Cold Spray Deposition Technique
title_full	Hydroxyapatite Coating On Magnesium Based Alloy For Bioimplant By Cold Spray Deposition Technique
title_fullStr	Hydroxyapatite Coating On Magnesium Based Alloy For Bioimplant By Cold Spray Deposition Technique
title_full_unstemmed	Hydroxyapatite Coating On Magnesium Based Alloy For Bioimplant By Cold Spray Deposition Technique
title_sort	hydroxyapatite coating on magnesium based alloy for bioimplant by cold spray deposition technique
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Bahan dan Sumber Mineral
publishDate	2012
url	http://eprints.usm.my/36923/1/CHE_WAN_NOORAKMA_ABDULLAH_24_Pages.pdf
_version_	1747820651427659776

Hydroxyapatite Coating On Magnesium Based Alloy For Bioimplant By Cold Spray Deposition Technique

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