简介：Znbasedmetalshaveexhibitedpromisingprospectsasastructuralmaterialforbiodegradableapplications.PureZnporousscaffoldswereproducedbylaserpowderbedfusion(LPBF)basedondatafilesofdesigningandCTseanning.MassiveZnevaporationduringlasermeltinglargelyinfluencedtheformationqualityduringLPBFofZnmetal.Themetalvaporinprocessingchamberwasblownoffandsuctionedoutefficientlybyanoptimizedgascirculationsystem.Numericalanalysiswasusedtodesignandtestifytheperformanceofgasflow.Thesurfaceofscaffoldswascoveredwithnumerousparticlesindifferentsizes.Processingporesoccurredneartheoutlinecontourofstruts.Theaveragegrainsizeinwidthwas8.5μm,andthehardnesswas43.8HV.Chemicalpluselectrochemicalpolishingobtainedunifonnandsmoothsurfacewithoutprocessingpores,butthediameterofstrutsreducedto250μmfromthedesignvalue300μm.Thepoorsurfacequalityandprocessingporeswereresultedbythesplashingparticlesincludedspattersandpowdersduetotherecoilforceofevaporation,andthehorizontalmovementofliquidmetalduetooverheatingandwetting.TheinsufficientmeltingattheoutlinecontourcombinedwithgoodwettingofZnliquidmetalfurtherincreasedthesurfaceroughnessandprocessingpores.