Surface modification of biomedical Mg-Ca and Mg-Zn-Ca alloys using selective laser melting:Corrosion behaviour,microhardness and biocompatibility

Xiyu Yao; Jincheng Tang; Yinghao Zhou; Andrej Atrens3; Matthew S.Dargusch3; Bjoern Wiese; Thomas Ebel; Ming Yan

2021

镁合金学报（英文）   影响因子和分区

Magnesium alloys such as Mg-Ca and Mg-Zn-Ca are good orthopaedic materials;however their tendency to corrode is high.Herein we utilize selective laser melting(SLM)to modify the surface of these Mg alloys to simultaneously improve the corrosion behaviour and microhardness.The corrosion rate decreased from(2.1±0.2)mm/a to(1.0±0.1)mm/a for the laser-processed Mg-0.6Ca,and from(1.6±0.1)mm/a to(0.7±0.2)mm/y for laser-processed Mg-0.5Zn-0.3Ca.The microhardness increased from(46±1)HV to(56±1)HV for Mg-0.6Ca,and from(47±3)HV to(55±3)HV for Mg-0.5Zn-0.3Ca.In addition,good biocompatibility remained in the laser processed Mg alloys.The improved properties are attributed to laser-induced grain refinement,confined impurity elements,residual stress,and modified surface chemistry.The results demonstra-ted the potential of SLM as a surface engineering approach for developing advanced biomedical Mg alloys.

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WanFang

mhjxb-y202106023

1.School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China;Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,China
2.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,China
3.The University of Queensland,School of Mechanical and Mining Engineering,Centre for Advanced Materials Processing and Manufacturing(AMPAM),QLD 4072 Australia
4.Institute of Materials Research,Helmholtz-Zentrum Geesthacht,Geesthacht 21502,Germany

Xiyu Yao,Jincheng Tang,Yinghao Zhou,et al. Surface modification of biomedical Mg-Ca and Mg-Zn-Ca alloys using selective laser melting:Corrosion behaviour,microhardness and biocompatibility[J]. 镁合金学报（英文）,2021,9(6):2199-2211.

Xiyu Yao.,Jincheng Tang.,Yinghao Zhou.,Andrej Atrens.,Matthew S.Dargusch.,...&Ming Yan.(2021).Surface modification of biomedical Mg-Ca and Mg-Zn-Ca alloys using selective laser melting:Corrosion behaviour,microhardness and biocompatibility.镁合金学报（英文）,9(6),2199-2211.

Xiyu Yao,et al."Surface modification of biomedical Mg-Ca and Mg-Zn-Ca alloys using selective laser melting:Corrosion behaviour,microhardness and biocompatibility".镁合金学报（英文） 9.6(2021):2199-2211.