Additive manufacturing of biodegradable Zn-xWE43 porous scaffolds: Formation quality, microstructure and mechanical properties

A review of additive manufacturing of Mg-based alloys and composite implants

“…Mechanical characteristics of the SLM-processed alloys were substantially weakened at higher Zn content primarily due to the decline in the level of densification. In addition, Qin et al [90] manufactured AM Zn-xWE43 porous scaffolds containing various WE43 volume ratios. Zn-5WE43 had the maximum tensile strength of 335.4 MPa, but the elongation was just 1%.…”

“…-Qin et al [90] ZK30/BG composites SLM -The rate of degradation of the ZK30 matrix declined with the BG introduction.…”

Additively manufactured functionally graded biodegradable porous zinc

“…6a and b), which could be attributed to the high ductility of pure Zn. 21 Regarding the functionally graded design (S0402), as the struts thickness continuously and gradually changed, abrupt changes in stress at the boundary between different struts could be minimized. 48 In the case of the three different groups, porosity strongly affected the elastic modulus and yield strengths of the AM Zn specimens: lower porosity resulted in a higher elastic modulus and yield strength.…”

“…20 A few research groups, including ours, have recently been successful in directly printing AM porous Zn. [21][22][23] In a previous study, we assessed the biodegradation behavior, mechanical properties, and cytocompatibility of an AM porous Zn biomaterial with a regular and uniform porous structure. 24 Now, the next step is to go beyond the uniform lattice structure and fully exploit the advantages of topological design and free-form fabrication offered by AM to meet the design requirements of biodegradable porous metals aimed at applications as bone substitutes.…”

Degradation‐triggered release from biodegradable metallic surfaces

“…The excessively slow in vivo corrosion kinetics is the major concern of the Fe‐based metals for temporary implants applications and various approaches have been attempted to overcome this drawback 3‐5 . Over the past 5 years, many works have been performed 6‐9 to reveal the interesting properties of Zn‐based materials as temporary bone scaffolds with the expectation that its emergence could address some of the main concerns associated with Mg and Fe. Zn‐based metals are the new alternative with moderate degradation rates that fall between those of Fe and Mg 10 …”