Back to Search Start Over

Development of non-equiatomic Bio-HEAs based on TiZrNbTa-(Mo and Mn)

Authors :
Jhuliene Elen Torrento
Tiago dos Santos Pereira de Sousa
Nilson Cristino da Cruz
Gerson Santos de Almeida
Willian Fernando Zambuzzi
Carlos Roberto Grandini
Diego Rafael Nespeque Correa
Source :
APL Materials, Vol 10, Iss 8, Pp 081113-081113-10 (2022)
Publication Year :
2022
Publisher :
AIP Publishing LLC, 2022.

Abstract

This study produced non-equiatomic TiNbZrTaMn and TiNbZrTaMo high entropy alloy (HEAs) by argon arc-melting and heat-treated for microstructural homogenization. The phase composition, microstructure, and selected mechanical properties were measured and compared with theoretical predictions. Additionally, electrochemical and cytotoxicity tests evaluated their potential applicability for use as biomaterials. X-ray diffraction measurements patterns showed a single BCC phase for the TiNbZrTaMn and a secondary HCP phase for the TiNbZrTaMo sample. The microstructural analysis revealed the formation of irregular grain boundaries and some lamellae formation, with chemical segregation of the alloying elements at the sub-micro-scale. The samples exhibited elastic modulus (80–110 GPa) closer to CP-Ti grade 2 (100 GPa) and higher Vickers microhardness (450–550 HV) than Ti–6Al–4V alloy (400 HV). The electrochemical and biological tests indicated a superior corrosion resistance against 0.9% NaCl solution compared with commercial metallic biomaterials, with proper cell adhesion and viability of pre-osteoblastic cells and hydrophilic behavior. Altogether, the data indicate that TiNbZrTaMn depicts better applicability potential for being used as a biomaterial in biomedical applications than some commercial materials (SS 316L, CP-Ti grade 2, and Ti–6Al–4V), mainly considering load-bearing orthopedical implants.

Details

Language :
English
ISSN :
2166532X
Volume :
10
Issue :
8
Database :
Directory of Open Access Journals
Journal :
APL Materials
Publication Type :
Academic Journal
Accession number :
edsdoj.278fb887bca740f3b33ad3b54e6530fc
Document Type :
article
Full Text :
https://doi.org/10.1063/5.0100465