Characterisation and thermodynamic calculations of biodegradable Mg–2.2Zn–3.7Ce and Mg–Ca–2.2Zn–3.7Ce alloys. Issue 11 (24th July 2017)

• Record Type: Journal Article
• Authors: Bakhsheshi-Rad, H. R.; Hamzah, E.; Joy Yii, S. L.; Mostafa, A.; Ebrahimi-Kahrizsangi, R.; Medraj, M.
• Is Part Of: Materials science and technology. Volume 33:Issue 11(2017)
• Page Start: 1333
• Page End: 1345
• Publication Date: 2017-07-24
• Subjects: Quaternary alloy systems -- phase diagrams -- phase identification -- mechanical properties -- corrosion behaviour; Materials science -- Periodicals; Microstructure -- Periodicals; Metallurgy -- Periodicals; 620.1105
• DOI: 10.1080/02670836.2017.1288777
• Languages: English
• ISSNs: 0267-0836

Abstract

ABSTRACT: In the present study, the effect of Ca (0.5–6 wt-%) content on the microstructure, phase formation, and mechanical properties and in vitro degradation behaviour of Mg–2.2Zn–3.7Ce alloys were investigated. Microstructural analysis and thermodynamic calculations also showed that Mg–2.2Zn–3.7Ce alloy contain α-Mg, Mg12 Ce and CeMgZn2, while after adding 0.5 wt-% Ca to Mg–2.2Zn–3.7Ce alloy, IM1 (Ca3 Mg x Zn15− x ) (4.6 ≤ x ≤ 12) phase was detected. Further addition of Ca to 6 wt-% resulted in forming Mg2 Ca besides α-Mg, Mg12 Ce and IM1 with the absence of CeMgZn2 . The tensile strength and elongation of the Mg–Ca–2.2Zn–3.7Ce alloys increase with increasing Ca content up to 1.5 wt-%, while further addition of Ca to 6 wt-% has a reversed effect. Similarly, the degradation rate of the alloys increased first with increasing Ca content and then decreased.