Properties Of Biocompatible Mg-Zn Alloy Based Hybrid Composite Fabricated By Powder Metallurgy

In this study, biodegradable and biactive metallic material of magnesium-zinc/hydroxyapatite/alumina (Mg-Zn/HAP/Al2O3) hybrid composite fabricated by powder metallurgy was developed. The main objective of this work was to investigate the effects of HAP and Al2O3 amount of content and weight ratio on...

Full description

Saved in:

Bibliographic Details
Main Author:	Ab Rashid, Nazirah
Format:	Thesis
Language:	English
Published:	2020
Subjects:	T Technology
Online Access:	http://eprints.usm.my/47554/1/Properties%20Of%20Biocompatible%20Mg-Zn%20Alloy%20Based%20Hybrid%20Composite%20Fabricated%20By%20Powder%20Metallurgy.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-usm-ep.47554
record_format	uketd_dc
spelling	my-usm-ep.475542021-11-17T03:42:09Z Properties Of Biocompatible Mg-Zn Alloy Based Hybrid Composite Fabricated By Powder Metallurgy 2020-06-01 Ab Rashid, Nazirah T Technology TA401-492 Materials of engineering and construction. Mechanics of materials In this study, biodegradable and biactive metallic material of magnesium-zinc/hydroxyapatite/alumina (Mg-Zn/HAP/Al2O3) hybrid composite fabricated by powder metallurgy was developed. The main objective of this work was to investigate the effects of HAP and Al2O3 amount of content and weight ratio on mechanical, corrosion and wear behaviour of Mg-Zn based alloy. The powders of Mg, Zn, HAP and Al2O3 were mixed in a high energy ball mill, compacted under 400 MPa and sintered at 300˚C. The increasing Al2O3 content from 0 to 15 wt. % in the hybrid composite resulted in improvement in hardness (57.60 Hv to 83.87 Hv) and compression strength (126.48 MPa to 244.20 MPa). Based on polarization test, 0 wt. % Al2O3 composite (i.e. consist of 15 wt. % HAP) is the most noble with corrosion potential (-1.604 V) and the lowest current density and corrosion rate (0.252 μA/cm2, 1.25 mm/year, respectively) due to apatite formation in Hanks Balanced Salt Solution (HBSS). While 5 wt. % Al2O3 (i.e. with 10 wt. % HAP) shows the highest wear resistance due to high hardness of Al2O3. Composite with 20 wt. % ceramic (HAP and Al2O3 with 2:1weight ratio) exhibited low hardness (67.03 Hv), low compressive strength (138.67 MPa), high corrosion rate (2.34 mm/year) and the low volume loss due to wear (4.9 to 14.6 x 10-4 mm3). Overall, hybrid composite with addition of 5 wt.% Al2O3 and 10 wt. % HAP at weight ratio 2:1 displayed the best properties, for biomedical implant application. 2020-06 Thesis http://eprints.usm.my/47554/ http://eprints.usm.my/47554/1/Properties%20Of%20Biocompatible%20Mg-Zn%20Alloy%20Based%20Hybrid%20Composite%20Fabricated%20By%20Powder%20Metallurgy.pdf application/pdf en public phd doctoral Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Bahan & Sumber Mineral
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	T Technology T Technology
spellingShingle	T Technology T Technology Ab Rashid, Nazirah Properties Of Biocompatible Mg-Zn Alloy Based Hybrid Composite Fabricated By Powder Metallurgy
description	In this study, biodegradable and biactive metallic material of magnesium-zinc/hydroxyapatite/alumina (Mg-Zn/HAP/Al2O3) hybrid composite fabricated by powder metallurgy was developed. The main objective of this work was to investigate the effects of HAP and Al2O3 amount of content and weight ratio on mechanical, corrosion and wear behaviour of Mg-Zn based alloy. The powders of Mg, Zn, HAP and Al2O3 were mixed in a high energy ball mill, compacted under 400 MPa and sintered at 300˚C. The increasing Al2O3 content from 0 to 15 wt. % in the hybrid composite resulted in improvement in hardness (57.60 Hv to 83.87 Hv) and compression strength (126.48 MPa to 244.20 MPa). Based on polarization test, 0 wt. % Al2O3 composite (i.e. consist of 15 wt. % HAP) is the most noble with corrosion potential (-1.604 V) and the lowest current density and corrosion rate (0.252 μA/cm2, 1.25 mm/year, respectively) due to apatite formation in Hanks Balanced Salt Solution (HBSS). While 5 wt. % Al2O3 (i.e. with 10 wt. % HAP) shows the highest wear resistance due to high hardness of Al2O3. Composite with 20 wt. % ceramic (HAP and Al2O3 with 2:1weight ratio) exhibited low hardness (67.03 Hv), low compressive strength (138.67 MPa), high corrosion rate (2.34 mm/year) and the low volume loss due to wear (4.9 to 14.6 x 10-4 mm3). Overall, hybrid composite with addition of 5 wt.% Al2O3 and 10 wt. % HAP at weight ratio 2:1 displayed the best properties, for biomedical implant application.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Ab Rashid, Nazirah
author_facet	Ab Rashid, Nazirah
author_sort	Ab Rashid, Nazirah
title	Properties Of Biocompatible Mg-Zn Alloy Based Hybrid Composite Fabricated By Powder Metallurgy
title_short	Properties Of Biocompatible Mg-Zn Alloy Based Hybrid Composite Fabricated By Powder Metallurgy
title_full	Properties Of Biocompatible Mg-Zn Alloy Based Hybrid Composite Fabricated By Powder Metallurgy
title_fullStr	Properties Of Biocompatible Mg-Zn Alloy Based Hybrid Composite Fabricated By Powder Metallurgy
title_full_unstemmed	Properties Of Biocompatible Mg-Zn Alloy Based Hybrid Composite Fabricated By Powder Metallurgy
title_sort	properties of biocompatible mg-zn alloy based hybrid composite fabricated by powder metallurgy
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Bahan & Sumber Mineral
publishDate	2020
url	http://eprints.usm.my/47554/1/Properties%20Of%20Biocompatible%20Mg-Zn%20Alloy%20Based%20Hybrid%20Composite%20Fabricated%20By%20Powder%20Metallurgy.pdf
_version_	1747821801665200128

Properties Of Biocompatible Mg-Zn Alloy Based Hybrid Composite Fabricated By Powder Metallurgy

Similar Items