Simultaneous enhancement of anti-friction and wear resistance performances via porous substrate and FeCoNiTiAl high entropy alloy coating of artificial joint materials

Journal of Materials Research and Technology

卷:19

Luquan Ren¹  Hongwei Zhao²  Wei Zhang³  Zhichao Ma⁴  Dongni Liu⁴  Hongcai Xie⁴ 

[1]Corresponding author.

[2]|Key Laboratory of Bionic Engineering Ministry of Education, Jilin University, Changchun, 130025, China

[3]|Key Laboratory of CNC Equipment Reliability, Ministry of Education, Jilin University, Changchun, 130025, China

[4]|School of Mechanical and Aerospace Engineering, Jilin University, Changchun, 130025, China

关键词: Artificial joint materials;    Coating;    Porous substrate;    High-entropy alloy;    Scratch;   

DOI  :  

来源: DOAJ

【 摘 要 】

It remains an extreme challenge to fabricate artificial joint materials with applicability of mechanical properties compared with bones, superior biocompatibility, anti-friction and wear resistance performances. Here, we report an effective strategy to simultaneously enhance the anti-friction and wear resistance performance of Ti6Al4V substrate through optimizing the porosity and sputtering a high-entropy alloy (HEA) coating. The progressive scratch experiments are carried out to equivalently imitate the scratch deformation process induced by hard particles and evaluate the anti-friction and wear resistance performances, which directly reveal the significantly decreased coefficient of friction (COF) of porous substrate based on suitable pore diameter covered with HEA coating compared with pure Ti6Al4V substrate. The porous design is verified to effectively weaken the stress shielding effect and simultaneously improve the hydrodynamic lubrication. Attributed to the coupling effects of pore structure-induced “flexibility” and HEA coating-induced surface hardening, the composite structure exhibits low COF value, wear volume and enhanced scratch resistance. The design concept would facilitate the development of novel medical implant materials with requirements of anti-friction and wear resistance.

【 授权许可】

Unknown