Microstructural, mechanical and corrosion characterization of an as-cast Mg-3Zn-0.4Ca alloy for biomedical applications  

作　　者：N.Pulido-Gonzalez B.Torres P.Rodrigo N.Hort J.Rams 

机构地区：[1]Department of Applied Mathematics,Materials Science and Engineering and Electronics Technology.ESCET,Rey Juan Carlos University,C/Tulipan s/n,28933 Mdstoles,Madrid,Spain [2]Magnesium Innovation Centre,Helmholtz-Zentrum Geesthacht,21502 Geesthacht,Germany

出　　处：《Journal of Magnesium and Alloys》2020年第2期510-522,共13页镁合金学报（英文）

基　　金：The authors would like to acknowledge the financial support from the Agencia Estatal de Investigacion(Project RTI2018-096391-B-C31);Comunidad de Madrid(Project ADITIMAT-CM S2018/NMT-4411);the FPU grant(15/03606)from the Ministerio de Educacion,Cultura y Deporte,Spain.

摘　　要：The as-cast Mg-3Zn-0.4Ca alloy shows a great potential to be used in biomedical applications due to its composition,mechanical properties and biodegradability.Zn and Ca appear naturally in the organism accomplishing vital functions.The alloy consists of an a-Mg matrix and a eutectic composed of a-Mg4-Ca2Mg6Zn3.The eutectic product enhances the mechanical properties of the studied alloy,causing strengthening and providing superior hardness values.In this alloy,cracks initiate at the intermetallic compounds and progress through the matrix because of the open network formed by the eutectics.Attending to the corrosion results,the eutectic product presents a noble potential compared to the a-Mg phase.For this reason,the corrosion progresses preferentially through the matrix,avoiding the(α-Mg+Ca2Mg6Zri3)eutectic product,when the alloy is in direct contact to Hank's solution.

关 键 词：Mg-Zn-Ca alloys Biomaterials Biodegradable implants NANOINDENTATION Three-point bending test Corrosion behaviour 

分 类 号：R318.08[医药卫生—生物医学工程] TG146.22[医药卫生—基础医学]