Effect of Mn Content on the Microstructure, Mechanical, and Corrosion Properties of Porous Mg–1Zn–1Ca Scaffolds

Abstract

Porous Mg alloys scaffolds are considered as an attractive strategy for bone repair due to their good biodegradability, biocompatibility, and suitable mechanical properties. In this study, porous Mg‐1Zn‐1Ca‐xMn (x = 0, 0.2, 0.5, 0.8) scaffolds with cubic pore structure were prepared, and the size of main pore and interconnected pores of the scaffolds were predicted to be 355∽450 μm, and 30∽50 μm, respectively. Among the four scaffolds, Mg‐1Zn‐1Ca‐0.8Mn scaffold possessed good mechanical properties, with a maximum yield strength of 27.1 and an elastic modulus of 0.66 GPa. However, Mg‐1Zn‐1Ca‐0.5Mn scaffold exhibited the optimal corrosion resistance with a corrosion rate 1.02mm/y after 5 days immersion in Hank’s solution. This is mainly attributed to α‐Mn phase is uniformly distributed on the substrate and uniformly degraded.This article is protected by copyright. All rights reserved.