Abstract
Abstract Zn alloys as the body’s temporary implants, it have recently aroused widespread attention by researchers in recent years. In order to meet the requirement of biomedical application, biodegradable Zn alloys should possess certain mechanical properties. To this end, it is generally required that the grain structure can be uniform and refined. In this work, a high-voltage pulsed magnetic field (PMF) was employed to homogenize and refine the as-cast biodegradable Zn-Al binary alloy. The results showed that a 6 kV PMF changes the coarse columnar Zn dendrites (739±90.9 urn) to fine spherical grains (187±16.1 urn). Accompanying the microstructural change, the compression yield strength, ultimate compression strength, tensile yield strength, ultimate tensile strength and elongation of the alloy are increased by 48.9%, >11.7%, 15.1%, 29.8% and 128%, respectively. Both the electrochemical and immersion tests show that PMF accelerates the corrosion rates of the Zn-Al alloy.
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