Zn based hydroxyapatite based coatings deposited on a novel FeMoTaTiZr high entropy alloy used for bone implants

2021 ◽  
pp. 101591
Author(s):  
Mirela M. Codescu ◽  
Alina Vladescu ◽  
Victor Geanta ◽  
Ionelia Voiculescu ◽  
Iulian Pana ◽  
...  
Keyword(s):  
High Entropy Alloy ◽  
Bone Implants ◽  
High Entropy

scholarly journals Bio-Functionalization of a Novel Biocompatible High Entropy Alloy Used For Bone Implants

2021 ◽  
Author(s):  
Mirela Maria Codescu ◽  
Alina Vladescu ◽  
Victor Geanta ◽  
Ionelia Voiculescu ◽  
Iulian Pana ◽  
...  
Keyword(s):  
Antibacterial Properties ◽  
Rf Magnetron Sputtering ◽  
Vacuum Arc ◽  
High Entropy Alloy ◽  
Bone Implants ◽  
High Entropy ◽  
Electrochemical Tests ◽  
Vacuum Arc Remelting ◽  
Zn Addition ◽  
High Dissolution Rate

In this paper, a novel biocompatible alloy defined as FeMoTaTiZr was obtained and functionalized by hydroxyapatite-based coatings (HAP) in order to increase their biocompatibility, bioactivity, and resistance to corrosion for to be used as bone implants. To obtain the surface with antibacterial properties, the HAP coatings were doped with small amount of Zn. The alloy was prepared using the VAR (Vacuum Arc Remelting) equipment, while the coatings by RF magnetron sputtering method. The EDS analysis confirmed the presence of Ca and P in the case of all developed coatings, having Ca/P or Ca/(P+Zn) ratio of about 1.70 and 1.66, respectively. The XRD and ATR-FTIR investigations confirmed the presence of calcium phosphate phases. The roughness of uncoated substrates increased after coating with HAP, and it was considerably increased by the Zn addition. The electrochemical tests showed that the un-doped HAP exhibited good corrosion behavior, while Zn doped HAP coatings have a high dissolution rate in fetal bovine serum, being more proper as a biodegradable material.

Instant and Persistent Hydrogen Production Using Nano High Entropy Catalyst

2019 ◽  
Author(s):  
Nirmal Kumar ◽  
Subramanian Nellaiappan ◽  
Ritesh Kumar ◽  
Kirtiman Deo Malviya ◽  
K. G. Pradeep ◽  
...  
Keyword(s):  
Formic Acid ◽  
Minimum Energy ◽  
High Entropy Alloy ◽  
Hydrogen Energy ◽  
High Entropy ◽  
Electro Oxidation ◽  
The Individual ◽  
Novel Catalyst ◽  
Cell Anode ◽  
Fuel Cell Anode

<div>Renewable harvesting clean and hydrogen energy using the benefits of novel multicatalytic materials of high entropy alloy (HEA equimolar Cu-Ag-Au-Pt-Pd) from formic acid with minimum energy input has been achieved in the present investigation. The synthesis effect of pristine elements in the HEA drives the electro-oxidation reaction towards non-carbonaceous pathway . The atomistic simulation based on DFT rationalize the distinct lowering of the d-band center for the individual atoms in the HEA as compared to the pristine counterparts. This catalytic activity of the HEA has also been extended to methanol electro-oxidation to show the unique capability of the novel catalyst. The nanostructured HEA, properties using a combination of casting and cry omilling techniques can further be utilized as fuel cell anode in direct formic acid/methanol fuel cells (DFFE).<br></div>

Complex magnetism and magnetoresistance of Gd-Tb-Dy-Ho-Lu hexagonal high-entropy alloy

2018 ◽  
Author(s):  
Janez Dolinšek ◽  
Stanislav Vrtnik ◽  
J. Lužnik ◽  
P. Koželj ◽  
M. Feuerbacher
Keyword(s):  
High Entropy Alloy ◽  
High Entropy

Recent progress in multi-element alloy and nitride coatings sputtered from high-entropy alloy targets

2006 ◽  
Vol 31 (6) ◽  
pp. 723-736 ◽  
Author(s):  
Keng-Hao Cheng ◽  
Chia-Han Lai ◽  
Su-Jien Lin ◽  
Jien-Wei Yeh
Keyword(s):  
Recent Progress ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Nitride Coatings

Ultrastrong Duplex High-Entropy Alloy with 2 GPa Cryogenic Strength Enabled by an Accelerated Martensitic Transformation

2019 ◽  
Author(s):  
Dong Geun Kim ◽  
Yong Hee Jo ◽  
Junha Yang ◽  
Won-Mi Choi ◽  
Hyoung Seop Kim ◽  
...  
Keyword(s):  
Martensitic Transformation ◽  
High Entropy Alloy ◽  
High Entropy

Phase Stability and Microstructural Evolution in a Ductile Refractory High Entropy Alloy Al 10Nb 15Ta 5Ti 30Zr 40

2019 ◽  
Author(s):  
V. Soni ◽  
Oleg N. Senkov, PhD ◽  
Jean-Philippe Couzinie, PhD ◽  
Yufeng Zheng, PhD ◽  
Bharat Gwalani, PhD ◽  
...  
Keyword(s):  
Microstructural Evolution ◽  
Phase Stability ◽  
High Entropy Alloy ◽  
High Entropy

Microstructure and Properties of a Co-Free Fe50mn27ni10cr13 High Entropy Alloy

2020 ◽  
Author(s):  
Raymond Kwesi Nutor ◽  
Muhammad Azeemullah ◽  
Q. P. Cao ◽  
X. D. Wang ◽  
D.X. Zhang ◽  
...  
Keyword(s):  
High Entropy Alloy ◽  
High Entropy ◽  
Microstructure And Properties
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