Tomographic investigation of the effects of second phases on the biodegradation and nano-mechanical performance of a Mg–Zn–Ca alloy

Y. Lu; R. G. Ding; Y. L. Chiu; I. P. Jones

doi:10.1016/j.mtla.2018.08.035

Tomographic investigation of the effects of second phases on the biodegradation and nano-mechanical performance of a Mg–Zn–Ca alloy

Y. Lu^*, R. G. Ding, Y. L. Chiu, I. P. Jones

^*Corresponding author for this work

Metallurgy and Materials

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

A combination of 3D tomography techniques provides direct evidence that links the phase assemblage to the bio-corrosion behaviour of a magnesium–zinc–calcium (Mg–Zn–Ca) alloy. The true shape, connectivity and volume fraction of the components have been determined using focused ion beam (FIB) tomography. The mechanism of the effect of the components with different morphologies on biodegradation was studied with the help of FIB. Micro X-ray CT (MicroCT) was used to investigate the degradation of the magnesium (Mg) alloys after 10 days’ immersion in simulated body fluid (SBF). Furthermore, the second phases affect the mechanical performance of the alloys. Nanoindentation was used to evaluate the nanohardness and elastic modulus of the (α-Mg + Ca ₂ Mg ₆ Zn ₃ ) eutectic products. The amount of second phase, however, is the key controlling factor in the bio-corrosion behaviour: any effect of configuration is undetectable.

Original language	English
Pages (from-to)	1-9
Number of pages	9
Journal	Materialia
Volume	4
Early online date	11 Sept 2018
DOIs	https://doi.org/10.1016/j.mtla.2018.08.035
Publication status	Published - 1 Dec 2018

Keywords

Biodegradation
FIB tomography
Magnesium alloy
Micro-CT
Microstructure
Nanoindentation

ASJC Scopus subject areas

Materials Science(all)

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@article{a504b9d566344f25ac72d1143395e4fe,

title = "Tomographic investigation of the effects of second phases on the biodegradation and nano-mechanical performance of a Mg–Zn–Ca alloy",

abstract = " A combination of 3D tomography techniques provides direct evidence that links the phase assemblage to the bio-corrosion behaviour of a magnesium–zinc–calcium (Mg–Zn–Ca) alloy. The true shape, connectivity and volume fraction of the components have been determined using focused ion beam (FIB) tomography. The mechanism of the effect of the components with different morphologies on biodegradation was studied with the help of FIB. Micro X-ray CT (MicroCT) was used to investigate the degradation of the magnesium (Mg) alloys after 10 days{\textquoteright} immersion in simulated body fluid (SBF). Furthermore, the second phases affect the mechanical performance of the alloys. Nanoindentation was used to evaluate the nanohardness and elastic modulus of the (α-Mg + Ca 2 Mg 6 Zn 3 ) eutectic products. The amount of second phase, however, is the key controlling factor in the bio-corrosion behaviour: any effect of configuration is undetectable. ",

keywords = "Biodegradation, FIB tomography, Magnesium alloy, Micro-CT, Microstructure, Nanoindentation",

author = "Y. Lu and Ding, {R. G.} and Chiu, {Y. L.} and Jones, {I. P.}",

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doi = "10.1016/j.mtla.2018.08.035",

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AU - Lu, Y.

AU - Ding, R. G.

AU - Chiu, Y. L.

AU - Jones, I. P.

PY - 2018/12/1

Y1 - 2018/12/1

N2 - A combination of 3D tomography techniques provides direct evidence that links the phase assemblage to the bio-corrosion behaviour of a magnesium–zinc–calcium (Mg–Zn–Ca) alloy. The true shape, connectivity and volume fraction of the components have been determined using focused ion beam (FIB) tomography. The mechanism of the effect of the components with different morphologies on biodegradation was studied with the help of FIB. Micro X-ray CT (MicroCT) was used to investigate the degradation of the magnesium (Mg) alloys after 10 days’ immersion in simulated body fluid (SBF). Furthermore, the second phases affect the mechanical performance of the alloys. Nanoindentation was used to evaluate the nanohardness and elastic modulus of the (α-Mg + Ca 2 Mg 6 Zn 3 ) eutectic products. The amount of second phase, however, is the key controlling factor in the bio-corrosion behaviour: any effect of configuration is undetectable.

AB - A combination of 3D tomography techniques provides direct evidence that links the phase assemblage to the bio-corrosion behaviour of a magnesium–zinc–calcium (Mg–Zn–Ca) alloy. The true shape, connectivity and volume fraction of the components have been determined using focused ion beam (FIB) tomography. The mechanism of the effect of the components with different morphologies on biodegradation was studied with the help of FIB. Micro X-ray CT (MicroCT) was used to investigate the degradation of the magnesium (Mg) alloys after 10 days’ immersion in simulated body fluid (SBF). Furthermore, the second phases affect the mechanical performance of the alloys. Nanoindentation was used to evaluate the nanohardness and elastic modulus of the (α-Mg + Ca 2 Mg 6 Zn 3 ) eutectic products. The amount of second phase, however, is the key controlling factor in the bio-corrosion behaviour: any effect of configuration is undetectable.

KW - Biodegradation

KW - FIB tomography

KW - Magnesium alloy

KW - Micro-CT

KW - Microstructure

KW - Nanoindentation

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JO - Materialia

JF - Materialia

ER -

Tomographic investigation of the effects of second phases on the biodegradation and nano-mechanical performance of a Mg–Zn–Ca alloy

Abstract

Keywords

ASJC Scopus subject areas

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