Design and properties of novel Ti–Zr–Hf–Nb–Ta high-entropy alloys for biomedical applications

2022 ◽  
Vol 141 ◽  
pp. 107421
Author(s):  
Wei Yang ◽  
Shujie Pang ◽  
Ying Liu ◽  
Qing Wang ◽  
Peter K. Liaw ◽  
...  
2019 ◽  
Vol 113 ◽  
pp. 106572 ◽  
Author(s):  
Amir Motallebzadeh ◽  
Naeimeh Sadat Peighambardoust ◽  
Saad Sheikh ◽  
Hideyuki Murakami ◽  
Sheng Guo ◽  
...  

Metals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 648
Author(s):  
Diogo Castro ◽  
Pedro Jaeger ◽  
Ana Catarina Baptista ◽  
João Pedro Oliveira

High-entropy alloys (HEAs) have been around since 2004. The breakthroughs in this field led to several potential applications of these alloys as refractory, structural, functional, and biomedical materials. In this work, a short overview on the concept of high-entropy alloys is provided, as well as the theoretical design approach. The special focus of this review concerns one novel class of these alloys: biomedical high-entropy alloys. Here, a literature review on the potential high-entropy alloys for biomedical applications is presented. The characteristics that are required for these alloys to be used in biomedical-oriented applications, namely their mechanical and biocompatibility properties, are discussed and compared to commercially available Ti6Al4V. Different processing routes are also discussed.


2017 ◽  
Vol 750 ◽  
pp. 180-183 ◽  
Author(s):  
Brandusa Ghiban ◽  
Gabriela Popescu ◽  
Daniela Dumitrescu ◽  
Vasile Soare

High Entropy Alloys (HEAs) represent a new concept of metallic materials, that contain 5 or more elements, in proportions from 5 at.% to 35 at.%, and form simple solid solutions (BCC and/or FCC) instead of complicated intermetallic phases. The high degree of randomness atomic HEA, gives them excellent properties: electrical, mechanical, electrochemical, ductility, anti-corrosion properties, stable structure etc, with applications in peak thus representing a growing research. These specific features provides HEA with excellent hardness, strength and wear strength, malleability, oxidation and corrosion resistance, with potential applications in diverse industrial areas [1÷4]. Considering these properties we decide to improve biomedical alloys with this new class of HEAs.


2019 ◽  
Author(s):  
Jack Pedersen ◽  
Thomas Batchelor ◽  
Alexander Bagger ◽  
Jan Rossmeisl

Using the high-entropy alloys (HEAs) CoCuGaNiZn and AgAuCuPdPt as starting points we provide a framework for tuning the composition of disordered multi-metallic alloys to control the selectivity and activity of the reduction of carbon dioxide (CO2) to highly reduced compounds. By combining density functional theory (DFT) with supervised machine learning we predicted the CO and hydrogen (H) adsorption energies of all surface sites on the (111) surface of the two HEAs. This allowed an optimization for the HEA compositions with increased likelihood for sites with weak hydrogen adsorption{to suppress the formation of molecular hydrogen (H2) and with strong CO adsorption to favor the reduction of CO. This led to the discovery of several disordered alloy catalyst candidates for which selectivity towards highly reduced carbon compounds is expected, as well as insights into the rational design of disordered alloy catalysts for the CO2 and CO reduction reaction.


2020 ◽  
Vol 2020 (4) ◽  
pp. 16-22
Author(s):  
A.I. Ustinov ◽  
◽  
V.S. Skorodzievskii ◽  
S.A. Demchenkov ◽  
S.S. Polishchuk ◽  
...  

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