摘要
用激光选区熔化(SLM)制备Ti6Al4V多孔结构,通过粉末冶金法充填β-TCP或PEEK,以期提高材料的骨传导性和耐磨性能。考虑到这些结构对种植体长期性能的重要性,对其腐蚀行为进行探讨。结果表明,与致密结构相比,开放孔洞的引入导致更高的电化学动力学。β-TCP和PEEK充填导致空洞或金属基体与充填材料之间产生间隙,影响多孔结构的腐蚀行为。
Ti6Al4V cellular structures were produced by selective laser melting(SLM)and then filled either with beta-tricalcium phosphate(β-TCP)or PEEK(poly-ether-ether-ketone)through powder metallurgy techniques,to improve osteoconductivity and wear resistance.The corrosion behavior of these structures was explored considering its importance for the long-term performance of implants.Results revealed that the incorporation of open cellular pores induced higher electrochemical kinetics when being compared with dense structures.The impregnation ofβ-TCP and PEEK led to the creation of voids or gaps between the metallic matrix and the impregnated material which also influenced the corrosion behavior of the cellular structures.
基金
supported by FCT through the grants PD/BD/140202/2018,SFRH/BD/140191/2018 and SFRH/BD/128657/2017
the projects PTDC/EMS-TEC/5422/2014 and NORTE-01-0145-FEDER-000018-HAMa BICo
supported by FCT with the reference project UID/EEA/04436/2019
the financial support through the M-ERA-NET/0001/2015 project(FCT)
关键词
Ti6Al4V多孔结构
腐蚀
多材料设计
PEEK
Β-TCP
Ti6Al4V cellular structures
corrosion
multimaterial design
poly-ether-ether-ketone(PEEK)
beta-tricalcium phosphate(β-TCP)
