Magnesium-based bioactive composites processed at room temperature
Magnesium-based bioactive composites processed at room temperature
Hydroxyapatite and bioactive glass particles were added to pure magnesium and an AZ91 magnesium alloy and then consolidated into disc-shaped samples at room temperature using high-pressure torsion (HPT). The bioactive particles appeared well-dispersed in the metal matrix after multiple turns of HPT. Full consolidation was attained using pure magnesium, but the center of the AZ91 disc failed to fully consolidate even after 50 turns. The magnesium-hydroxyapatite composite displayed an ultimate tensile strength above 150 MPa, high cell viability, and a decreasing rate of corrosion during immersion in Hank’s solution. The composites produced with bioactive glass particles exhibited the formation of calcium phosphate after 2 h of immersion in Hank’s solution and there was rapid corrosion in these materials.
bioactive glass, biodegradable material, composites, high-pressure torsion, magnesium, hydroxyapatite
1-16
de Castro, Moara M.
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Lopes, Debora R.
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Soares, Renata B.
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dos Santos, Diogo M.M.
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Nunes, Eduardo H.M.
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Lins, Vanessa F.C.
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Pereira, Pedro Henrique R.
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Isaac Neta, Augusta C.
8bbd9d2d-a43b-442f-8d29-ae1a319ca616
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Figueiredo, Roberto
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August 2019
de Castro, Moara M.
cb6729d8-fd38-46a4-91e3-a87da53d0e99
Lopes, Debora R.
e5337680-cbf4-4bd8-b117-97e327bcc0eb
Soares, Renata B.
deabafe8-36af-47ce-8b8f-14e4555f20df
dos Santos, Diogo M.M.
ef36401a-87c8-4b23-8787-35132680cb99
Nunes, Eduardo H.M.
2125ab97-ea6b-45b4-bea1-216587f1fae2
Lins, Vanessa F.C.
6cc9cd28-501a-495d-a452-5ed5366b0601
Pereira, Pedro Henrique R.
f033a8a6-ddad-4f6a-91ec-521a3358e4c2
Isaac Neta, Augusta C.
8bbd9d2d-a43b-442f-8d29-ae1a319ca616
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Figueiredo, Roberto
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de Castro, Moara M., Lopes, Debora R., Soares, Renata B., dos Santos, Diogo M.M., Nunes, Eduardo H.M., Lins, Vanessa F.C., Pereira, Pedro Henrique R., Isaac Neta, Augusta C., Langdon, Terence G. and Figueiredo, Roberto
(2019)
Magnesium-based bioactive composites processed at room temperature.
Materials, 12 (6), , [2609].
(doi:10.3390/ma12162609).
Abstract
Hydroxyapatite and bioactive glass particles were added to pure magnesium and an AZ91 magnesium alloy and then consolidated into disc-shaped samples at room temperature using high-pressure torsion (HPT). The bioactive particles appeared well-dispersed in the metal matrix after multiple turns of HPT. Full consolidation was attained using pure magnesium, but the center of the AZ91 disc failed to fully consolidate even after 50 turns. The magnesium-hydroxyapatite composite displayed an ultimate tensile strength above 150 MPa, high cell viability, and a decreasing rate of corrosion during immersion in Hank’s solution. The composites produced with bioactive glass particles exhibited the formation of calcium phosphate after 2 h of immersion in Hank’s solution and there was rapid corrosion in these materials.
Text
Castro2019_Materials_submitted
- Accepted Manuscript
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materials-12-02609
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More information
Accepted/In Press date: 11 August 2019
e-pub ahead of print date: 16 August 2019
Published date: August 2019
Keywords:
bioactive glass, biodegradable material, composites, high-pressure torsion, magnesium, hydroxyapatite
Identifiers
Local EPrints ID: 433773
URI: http://eprints.soton.ac.uk/id/eprint/433773
PURE UUID: 5e5aad9c-6422-44e9-9ff1-bc2b36907e6f
Catalogue record
Date deposited: 03 Sep 2019 16:30
Last modified: 17 Mar 2024 02:55
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Contributors
Author:
Moara M. de Castro
Author:
Debora R. Lopes
Author:
Renata B. Soares
Author:
Diogo M.M. dos Santos
Author:
Eduardo H.M. Nunes
Author:
Vanessa F.C. Lins
Author:
Pedro Henrique R. Pereira
Author:
Augusta C. Isaac Neta
Author:
Roberto Figueiredo
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