Microstructures and biocorrosion properties of biodegradable Mg–Zn–Y–Ca–xZr alloys

Abstract The influence of Zr microalloying on the microstructures and corrosion resistance of as-cast Mg-3.0Zn-0.6Y-0.3Ca (wt.%) alloy were investigated by means of optical microscopy, X-ray diffraction analysis, transmission electron microscopy, scanning electron microscopy, immersion testing and electrochemical measurements. The results indicated that Zr induced the formation of a strip-like eutectic phase at the grain boundaries, and discouraged the formation of isolated particles. With the Zr addition, the microstructure was refined and the corrosion resistance was enhanced. The alloy with a Zr content of 0.5 wt.% has an optimal corrosion resistance, which can be attributed to the fine and continuously distributed strip-like I-phase and fine grain structure.

[1]  Hongxia Wang,et al.  Corrosion behavior of Mg-6Bi-2Sn alloy in the simulated body fluid solution: The influence of microstructural characteristics , 2018 .

[2]  Y. Zhang,et al.  Microstructure, mechanical properties, corrosion behavior and film formation mechanism of Mg-Zn-Mn-xNd in Kokubo's solution , 2018 .

[3]  Y. Zhang,et al.  Effects of calcium addition on phase characteristics and corrosion behaviors of Mg-2Zn-0.2Mn-xCa in simulated body fluid , 2017 .

[4]  Wei Li,et al.  The synergistic effect of trace Sr and Zr on the microstructure and properties of a biodegradable Mg-Zn-Zr-Sr alloy , 2017 .

[5]  K. Nie,et al.  Effects of Li on Microstructures, Mechanical, and Biocorrosion Properties of Biodegradable Mg94‐xZn2Y4Lix Alloys with Long Period Stacking Ordered Phase   , 2017 .

[6]  L. Li,et al.  Microstructure, mechanical and bio-corrosion properties of Mg–Zn–Zr alloys with minor Ca addition , 2017 .

[7]  Xitao Wang,et al.  Microstructure, Mechanical Properties and In Vitro Degradation Behavior of a Novel Biodegradable Mg–1.5Zn–0.6Zr–0.2Sc Alloy , 2015 .

[8]  M. Dargusch,et al.  Review of Recent Developments in the Field of Magnesium Corrosion , 2015 .

[9]  D. Qiu,et al.  Current research progress in grain refinement of cast magnesium alloys: A review article , 2015 .

[10]  X. Wang,et al.  Comparison of corrosion behavior of Mg‐1.5Zn‐0.6Zr and AZ91D alloys in a NaCl solution , 2015 .

[11]  Baoping Zhang,et al.  Effect of Ca addition on the microstructure and tensile properties of Mg–4.0Zn–2.0Gd alloys , 2014 .

[12]  Ke Yang,et al.  Study on biodegradation of the second phase Mg17Al12 in Mg-Al-Zn alloys: in vitro experiment and thermodynamic calculation. , 2014, Materials science & engineering. C, Materials for biological applications.

[13]  Daokui Xu,et al.  Effect of quasicrystalline phase on improving the corrosion resistance of a duplex structured Mg–Li alloy , 2014 .

[14]  G. Song,et al.  Corrosion behaviour in salt spray and in 3.5% NaCl solution saturated with Mg(OH)2 of as-cast and solution heat-treated binary Mg–X alloys: X = Mn, Sn, Ca, Zn, Al, Zr, Si, Sr , 2013 .

[15]  G. Song,et al.  Corrosion of ultra-high-purity Mg in 3.5% NaCl solution saturated with Mg(OH)2 , 2013 .

[16]  Liu Guojun,et al.  Effects of doping atoms on the generalized stacking-fault energies of Mg alloys from first-principles calculations , 2013 .

[17]  H. Bakhsheshi‐Rad,et al.  Relationship between the corrosion behavior and the thermal characteristics and microstructure of Mg–0.5Ca–xZn alloys , 2012 .

[18]  Daokui Xu,et al.  Effects of icosahedral phase formation on the microstructure and mechanical improvement of Mg alloys: A review , 2012 .

[19]  A. Atrens,et al.  Corrosion behaviour of a nominally high purity Mg ingot produced by permanent mould direct chill casting , 2012 .

[20]  C. Wen,et al.  Mg-Zr-Sr alloys as biodegradable implant materials. , 2012, Acta biomaterialia.

[21]  Darren J. Martin,et al.  Corrosion of high purity Mg, Mg2Zn0.2Mn, ZE41 and AZ91 in Hank’s solution at 37 °C , 2011 .

[22]  N. Birbilis,et al.  Effect of grain size on corrosion of high purity aluminium , 2011 .

[23]  A. Atrens,et al.  An innovative specimen configuration for the study of Mg corrosion , 2011 .

[24]  F. Cheng,et al.  Effect of pH on the in vitro corrosion rate of magnesium degradable implant material , 2010 .

[25]  K. Nogita,et al.  Engineering the Mg–Mg2Ni eutectic transformation to produce improved hydrogen storage alloys , 2009 .

[26]  Yingwei Song,et al.  Corrosion characterization of Mg–8Li alloy in NaCl solution , 2009 .

[27]  Ke Yang,et al.  Microstructure, mechanical properties and corrosion properties of Mg–Zn–Y alloys with low Zn content , 2008 .

[28]  M. Liu,et al.  Influence of the β-phase morphology on the corrosion of the Mg alloy AZ91 , 2008 .

[29]  Tadashi Kokubo,et al.  How useful is SBF in predicting in vivo bone bioactivity? , 2006, Biomaterials.

[30]  G. Song,et al.  Understanding Magnesium Corrosion—A Framework for Improved Alloy Performance , 2003 .

[31]  J. Kerstetter,et al.  Nutrition in Bone Health Revisited: A Story Beyond Calcium , 2000, Journal of the American College of Nutrition.