Comparative analysis of microstructure,mechanical,and corrosion properties of biodegradable Mg-3Y alloy prepared by selective laser melting and spark plasma sintering  

作　　者：P.Minárik M.Zemková S.Šašek J.Dittrich M.Knapek F.Lukáˇc D.Koutný J.Jaroš R.Král 

机构地区：[1]Faculty of Mathematics and Physics,Charles University,Ke Karlovu 5,Praha 12116,Czech Republic [2]Research Centre,University ofŽilina,Univerzitná8215/1,Žilina 01026,Slovakia [3]Institute of Plasma Physics of the Czech Academy of Sciences,Za Slovankou 1782/3,18200 Praha 8,Czech Republic [4]Institute of Machine and Industrial Design,Brno University of Technology,Technická2896/2,Brno 61669,Czech Republic

出　　处：《Journal of Magnesium and Alloys》2024年第4期1496-1510,共15页镁合金学报（英文）

基　　金：supported by the Czech Science Foundation under project no.22-21122J;Partial financial support from the Ministry of Health of the Czech Republic under the grant Nr.20-08-00150;partial financial support from the Charles University Grant Agency under project number 389422;partial financial support from the Science Grant Agency of the Slovak Republic through project No.1/0153/21;faculty specific research project FSI-S-23-8340.

摘　　要：This work explored possibilities of biodegradable magnesium alloy Mg-3Y preparation by two modern powder metallurgy techniques–spark plasma sintering(SPS)and selective laser melting(SLM).The powder material was consolidated by both methods utilising optimised parameters,which led to very low porosity(∼0.3%)in the SLM material and unmeasurably low porosity in the SPS material.The main aim of the study was the thorough microstructure characterisation and interrelation between the microstructure and the functional properties,such as mechanical strength,deformability,and corrosion resistance.Both materials showed comparable strength of∼110 MPa in tension and compression and relatively good deformability of∼9%and∼21%for the SLM and SPS materials,respectively.The corrosion resistance of the SPS material in 0.1 M NaCl solution was superior to the SLM one and comparable to the conventional extruded material.The digital image correlation during loading and the cross-section analysis of the corrosion layers revealed that the residual porosity and large strained grains have the dominant negative effect on the functional properties of the SLM material.On the other hand,one of the primary outcomes of this study is that the SPS consolidation method is very effective in the preparation of the W3 biodegradable alloy,resulting in material with convenient mechanical and degradation properties that might find practical applications.

关 键 词：Magnesium YTTRIUM Powder metallurgy MICROSTRUCTURE Mechanical strength Corrosion resistance 

分 类 号：TF125.22[冶金工程—粉末冶金]