Manufacturing Technology 2020, 20(5):668-676

The Effect of Zinc and Calcium Addition on Magnesium Alloy

Andrea Školáková1,2, Tomáš Lovaši1, Jan Pinc1,2, Zdeněk Kačenka1, Lenka Rieszová1, Zuzana Žofková1
1 Department of Metals and Corrosion Engineering, University of Chemistry and Technology, Technická 5, 166 28 Prague 6, Czech Republic
2 Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 182 21 Prague 8, Czech Republic

The magnesium alloys, alloyed by the low amount of calcium and zinc concurrently, are considered as a biodegradable materials for implants. However, the as-cast alloy exhibits the insufficient mechanical properties as well as corrosion resistance which are affected mainly by the presence of brittle secondary phases, such as Mg2Ca. For this reason, presented work was focused on the as-cast magnesium alloy with alloying elements (Ca and Zn) whose content did not exceed 1 wt. %, specifically MgCa0.5Zn0.5 (in wt. %). Microstructure consisted of magnesium matrix with a very low amount of Mg2Ca and Ca2Mg6Zn3 phases which crystallized along the boundaries. These phases and their localization influenced the resulted mechanical properties. The hardness was higher due to them and tensile properties were worse than the compressive ones. The addition of zinc did not improve ductility, but in the case of compressive stress-strain test, the relative deformation was satisfactory. Moreover, the corrosion resistance of as-cast alloy MgCa0.5Zn0.5 was better than pure magnesium.

Keywords: Magnesium alloys, Biomaterials, Casting, Mechanical Properties, Corrosion resistance
Grants and funding:

Specific university research – grant No A2_FCHT_2020_066 and No A1_FCHT_2020_003.

Received: July 28, 2020; Revised: November 6, 2020; Accepted: November 23, 2020; Prepublished online: November 23, 2020; Published: December 14, 2020  Show citation

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Školáková A, Lovaši T, Pinc J, Kačenka Z, Rieszová L, Žofková Z. The Effect of Zinc and Calcium Addition on Magnesium Alloy. Manufacturing Technology. 2020;20(5):668-676.
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