In Vitro Biodegradation and Mechanical Properties of Mg-Zn Alloy and Mg-Zn-Hydroxyapatite Composite Produced by Mechanical Alloying for Potential Application in Bone Repair

Emee Marina Salleh, Hussain Zuhailawati, Siti Noor Fazliah Mohd Noor, Norinsan Kamil Othman

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A biodegradable Mg-6.5 wt pct Zn (Mg-Zn) alloy and Mg-6.5 wt pct Zn reinforced with 10 wt pct hydroxyapatite (HA) composite were prepared by mechanical milling. In vitro biodegradation activity as a function of immersion time was performed in Hank’s balanced salt solution (HBSS). The dissolution of Mg ions (Mg2+) decreased from 75.74 µg/ml of pure Mg to 59.24 µg/ml and 46.88 µg/ml corresponding to the Mg-Zn alloy and Mg-Zn/HA composite, respectively. This finding indicates the progressive effect of HA followed by the Zn addition in decelerating the degradation rate of Mg. More positive corrosion potential of Mg-6.5 wt pct Zn alloy (− 1.5015 V) and Mg-Zn/10 wt pct HA composite (− 1.4647 V) than that of pure Mg (− 1.6972 V) suggested that the Mg-Zn/10 wt pct HA composite exhibited the highest corrosion resistance in the bioenvironment. The compressive strength values after 7 days of immersion in HBSS of the Mg-Zn alloy and Mg-Zn/HA composite are 230.64 and 278.46 MPa, respectively, and these are considerably higher compared to the compressive strength of the cortical bone (100 to 230 MPa).

Original languageEnglish
Pages (from-to)5888-5903
Number of pages16
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume49
Issue number11
DOIs
Publication statusPublished - 1 Nov 2018

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biodegradation
Mechanical alloying
Durapatite
Biodegradation
Hydroxyapatite
bones
alloying
Bone
Repair
mechanical properties
Mechanical properties
composite materials
Composite materials
compressive strength
submerging
Compressive strength
salts
Salts
corrosion resistance
corrosion

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

Cite this

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title = "In Vitro Biodegradation and Mechanical Properties of Mg-Zn Alloy and Mg-Zn-Hydroxyapatite Composite Produced by Mechanical Alloying for Potential Application in Bone Repair",
abstract = "A biodegradable Mg-6.5 wt pct Zn (Mg-Zn) alloy and Mg-6.5 wt pct Zn reinforced with 10 wt pct hydroxyapatite (HA) composite were prepared by mechanical milling. In vitro biodegradation activity as a function of immersion time was performed in Hank’s balanced salt solution (HBSS). The dissolution of Mg ions (Mg2+) decreased from 75.74 µg/ml of pure Mg to 59.24 µg/ml and 46.88 µg/ml corresponding to the Mg-Zn alloy and Mg-Zn/HA composite, respectively. This finding indicates the progressive effect of HA followed by the Zn addition in decelerating the degradation rate of Mg. More positive corrosion potential of Mg-6.5 wt pct Zn alloy (− 1.5015 V) and Mg-Zn/10 wt pct HA composite (− 1.4647 V) than that of pure Mg (− 1.6972 V) suggested that the Mg-Zn/10 wt pct HA composite exhibited the highest corrosion resistance in the bioenvironment. The compressive strength values after 7 days of immersion in HBSS of the Mg-Zn alloy and Mg-Zn/HA composite are 230.64 and 278.46 MPa, respectively, and these are considerably higher compared to the compressive strength of the cortical bone (100 to 230 MPa).",
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AU - Othman, Norinsan Kamil

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