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

Yao，Xiyu1,2; Tang，Jincheng2; Zhou，Yinghao1,2; Atrens，Andrej3; Dargusch，Matthew S.3; Wiese，Bjoern4; Ebel，Thomas4; Yan，Ming2

2020

10.1016/j.jma.2020.08.011

Journal of Magnesium and Alloys   影响因子和分区

2213-9567

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/y to 1.0 ± 0.1 mm/y for the laser-processed Mg–0.6Ca, and from 1.6 ± 0.1 mm/y 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 demonstrated the potential of SLM as a surface engineering approach for developing advanced biomedical Mg alloys.

Corrosion behaviour Mg alloys Microhardness Selective laser melting Surface modification

EI ; SCI

英语

通讯

Shenzhen Science and Technology Innovation Commission[JCYJ20180504165824643] ; Shenzhen Industrial and Information Technology Bureau[ZDYBH201900000009] ; Australian Research Council Research Hub for Advanced Manufacturing of Medical Devices[IH150100024]

Metallurgy & Metallurgical Engineering

Metallurgy & Metallurgical Engineering

WOS:000753916100001

KEAI PUBLISHING LTD

20204109322847

2-s2.0-85092112498

Scopus

1.School of Materials Science and Engineering,Harbin Institute of Technology,Harbin,150001,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),4072,Australia
4.Institute of Materials Research,Helmholtz-Zentrum Geesthacht,Geesthacht,21502,Germany

Yao，Xiyu,Tang，Jincheng,Zhou，Yinghao,et al. Surface modification of biomedical Mg-Ca and Mg-Zn-Ca alloys using selective laser melting: Corrosion behaviour, microhardness and biocompatibility[J]. Journal of Magnesium and Alloys,2020,9(6):2155-2168.

Yao，Xiyu.,Tang，Jincheng.,Zhou，Yinghao.,Atrens，Andrej.,Dargusch，Matthew S..,...&Yan，Ming.(2020).Surface modification of biomedical Mg-Ca and Mg-Zn-Ca alloys using selective laser melting: Corrosion behaviour, microhardness and biocompatibility.Journal of Magnesium and Alloys,9(6),2155-2168.

Yao，Xiyu,et al."Surface modification of biomedical Mg-Ca and Mg-Zn-Ca alloys using selective laser melting: Corrosion behaviour, microhardness and biocompatibility".Journal of Magnesium and Alloys 9.6(2020):2155-2168.