Development of a TiNbTaMoZr-Based High Entropy Alloy with Low Young´s Modulus by Mechanical Alloying Route

Metals

Rocío Moriche¹  Ernesto Chicardi²  RanierEnrique Sepúlveda Ferrer²  Cristina García-Garrido³  Juliette Normand⁴ 

[1] Departamento de Física de la Materia Condensada, Universidad de Sevilla, 41080 Sevilla, Spain;Departamento de Ingeniería y Ciencia de los Materiales y del Transporte, Universidad de Sevilla, 41092 Sevilla, Spain;Instituto Andaluz del Patrimonio Histórico (IAPH), 41092 Sevilla, Spain;SIGMA Clermont, 63178 Aubière, France;

关键词: high-entropy alloys;    titanium;    biomaterials;    bone tissue engineering;    mechanical alloying;    Young’s modulus;   

DOI  :  10.3390/met10111463

来源: DOAJ

【 摘 要 】

In this work, an equiatomic TiNbTaMoZr-based high-entropy alloy (HEA) has been developed by a powder metallurgy route, which consists of a process of combined one-step low-temperature mechanical milling starting from the transition metals as raw materials and a subsequent pressureless sintering. In this way, the optimized synthesized specimen, after 10 h of milling time, showed two different body-centered cubic (bcc) TiNbTaMoZr alloys, which, after sintering at 1450 °C, 1 h of dwell time and a heating and cooling rate of 5 °C min⁻¹, it remained formed as two bcc TiNbTaMoZr-based HEAs. This material, with micrometric and equiaxed particles, and with homogeneously distributed phases, presented a Young’s modulus that was significantly higher (5.8 GPa) and lower (62.1 GPa) than that of the usual commercially pure (cp) Ti and Ti6Al4V alloy used for bone-replacement implants. It also presented similar values to those of the HEAs developed for the same purpose. These interesting properties would enable this TiNbTaMoZr-based HEA to be used as a potential biomaterial for bulk or porous bone implants with high hardness and low Young´s modulus, thereby preventing the appearance of stress-shielding phenomena.

【 授权许可】

Unknown