The Influence of Hydroxyapatite and Alumina Particles on the Mechanical Properties and Corrosion Behavior of Mg-Zn Hybrid Composites for Implants

The Influence of Hydroxyapatite and Alumina Particles on the Mechanical Properties and Corrosion Behavior of Mg-Zn Hybrid Composites for Implants

Considering the necessity for a biodegradable implant alloy with good biocompatibility and mechanical strength, dual ceramic particles of HAP and Al2O3 were added to Mg-Zn alloy to produce a new hybrid composite using powder metallurgy. The paper reports the mechanical and corrosion behaviour of Mg-...

Full description

Saved in:
Bibliographic Details
Published in:Materials Vol. 14; no. 21; p. 6246
Main Authors: Nazirah, Rashid, Zuhailawati, Hussain, Siti Nur Hazwani, Mohamad Rodzi, Abdullah, Tuti Katrina, Azzura, Ismail, Dhindaw, Brij Kumar
Format: Journal Article
Language:English
Published: Basel MDPI AG 20-10-2021
MDPI
Subjects:
Aluminum oxide
Apatite
Ball milling
Biocompatibility
Biodegradability
Biological activity
Ceramic powders
Compressive strength
Corrosion resistance
Corrosion tests
Electrodes
Hybrid composites
Hydroxyapatite
Magnesium alloys
Magnesium base alloys
Mechanical properties
Powder metallurgy
Saline solutions
Sintering (powder metallurgy)
Stainless steel
Titanium alloys
Transplants & implants
Zinc
United States > US
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Considering the necessity for a biodegradable implant alloy with good biocompatibility and mechanical strength, dual ceramic particles of HAP and Al2O3 were added to Mg-Zn alloy to produce a new hybrid composite using powder metallurgy. The paper reports the mechanical and corrosion behaviour of Mg-Zn/HAP/Al2O3 hybrid composites containing variable wt.% HAP and Al2O3 with 15 wt.% total ceramic content. The powders of Mg, Zn, Al2O3 and HAP were milled in a high-energy ball mill, and then compacted under 400 MPa and sintered at 300 °C. Density and compression strength increased with increasing Al2O3 content. HAP facilitated weight gain in Hanks balanced salt solution due to deposition of an apatite layer which promoted anodic behaviour with higher corrosion resistance. A hybrid composite of Mg alloy with 5 wt.% Al2O3 and 10 wt.% HAP displayed 153 MPa compressive strength, 1.37 mm/year corrosion resistance and bioactivity with a CA:P ratio of 1:1.55 and appears to be the most promising biodegradable implant material tested.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1996-1944
1996-1944
DOI:10.3390/ma14216246