Improved biodegradation resistance by grain refinement of novel antibacterial ZK30-Cu alloys produced via selective laser melting

Abstract

Cu-containing Mg alloys are a novel type of antibacterial biomaterial based on biodegradation of Mg and antibacterial functions of Cu. However, fast degradation limits their clinical application. For the first time, this work utilizes the synergistic effects of biodegradation of ZK30, antibacterial function of Cu and grain refinement by selective laser melting (SLM) to prepare high-performance antibacterial ZK30-Cu alloys. The obtained alloys have an improved biodegradation resistance, which is attributed to remarkable grain refinement by SLM. Furthermore, the alloys exhibit good antibacterial ability and cytocompatibility.

Effect of Alloying Mn by Selective Laser Melting on the Microstructure and Biodegradation Properties of Pure Mg

“…The layer thickness was controlled by the Z-axial movement of the motion platform. The process parameters were optimized based on our previous work [16] and listed in Table 1. Samples with a diameter of 6 mm and a height of 5 mm were built up, with built layers set up to 100.…”

Influence of Tempering Temperature on the Microstructure and Mechanical Properties of a Cr–Ni–Mo‐Alloyed Steel for Rock Drill Applications

“…From the point of view of production technology, these properties can be achieved through an optimized heat treatment . 23CrNi3Mo, a Cr–Ni–Mo steel, is widely used as rock drill steel at present, which can be heat‐treated to obtain a good combination of strength and toughness by austenizing, quenching, and tempering, because it contains the alloying elements such as Cr, Ni, and Mo, which promote high hardenability . However, 23CrNi3Mo rock drill tools often suffer early failure, such as brittle failure or fatigue failure even though there has been relatively little wear .…”

Biodegradation, Antibacterial Performance, and Cytocompatibility of a Novel ZK30-Cu-Mn Biomedical Alloy Produced by Selective Laser Melting

“…Furthermore, mechanical properties may be improved by alloying and grain refinement. Previous work indicated that ZK30 (Mg-3Zn-0.5Zr) had good mechanical properties and biodegradation resistance[ 13 , 23 ]. When Cu was added to ZK30 by SLM, SLMed ZK30-0.2Cu had a uniform microstructure, good cytocompatibility, and antibacterial performance[ 23 ].…”