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Mechanical properties and biodegradable behavior of Mg–6%Zn–Ca3(PO4)2 metal matrix composites in Ringer's solution

Abstract The purpose of this study is to investigate the mechanical properties of Mg–6%Zn–Ca3(PO4)2 composite and evaluate its biodegradable behavior in Ringer's solution. The Mg–6%Zn alloy with 5%, 10% and 15% addition of Ca3(PO4)2 as reinforcements are produced through a powder-metallurgy sinter method and their corrosion properties are tested. The results show that the mechanical properties of the Mg–6%Zn–Ca3(PO4)2 composites are adjustable by the addition and particle distributions of Ca3(PO4)2. The Mg–6%Zn–5%, 10%Ca3(PO4)2 composites obtain properties including density, Young's modulus, and strength similar to natural bone. The Mg matrix, Mg7Zn3 phase, and Ca3(PO4)2 are identified in the experimental composite. Immersion and electrochemical corrosion tests reveal that 5% and 10% addition of Ca3(PO4)2 particles in the Mg–6%Zn alloy exhibit acceptable corrosion resistance in Ringer's solution.