摘要
Binder jet printing(BJP)is a state-of-the-art additive manufacturing technique for producing porous magnesium structures.Porous MgZn-Zr based BJP samples were assessed for corrosion performance in simulated body fluids by electrochemical and hydrogen evolution measurements.The corrosion rates of the BJP specimens were significantly higher than solid controls,even after accounting for their larger surface areas,suggesting that the BJP microstructure is detrimental to corrosion performance.X-ray computed tomography revealed nonuniform corrosion within the porous structure,with corrosion products forming on the pore walls.Impregnating the pores with hydroxyapatite or polymers greatly improved the corrosion resistance of the BJP samples.
基金
the first Singapore-Germany Academic-Industry(2+2)international collaboration grant(Grant No.:A1890b0050)
Agency for Science,Technology and Research(A^(*)STAR),under the RIE2020 Advanced Manufacturing and Engineering(AME)Programmatic Grant No.A1881b0061
support of a scholarship from the A^(*)STAR Graduate Academy。
作者简介
Corresponding author at:Daniel J.Blackwood,National University of Singapore,Singapore.E-mail addresses:msedjb@nus.edu.sg;Mui Ling Sharon Nai,Corresponding author at:Singapore Institute of Manufacturing Technology(SIMTech),mlnai@simtech.a-star.edu.sg。
