Effect of substrate bias voltage on the mechanical properties and deformation mechanisms in the nanostructured Ti-22Nb-10Zr coating
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F21%3A00347047" target="_blank" >RIV/68407700:21230/21:00347047 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21340/21:00347047 RIV/00216208:11320/21:10437537
Result on the web
<a href="https://doi.org/10.1016/j.surfcoat.2020.126674" target="_blank" >https://doi.org/10.1016/j.surfcoat.2020.126674</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.surfcoat.2020.126674" target="_blank" >10.1016/j.surfcoat.2020.126674</a>
Alternative languages
Result language
angličtina
Original language name
Effect of substrate bias voltage on the mechanical properties and deformation mechanisms in the nanostructured Ti-22Nb-10Zr coating
Original language description
The manufacturing of future implants based on NiTi shape memory alloys, like stents, orthodontic archwires, intracranial aneurysms..., clips aims to eliminate the cytotoxicity and allergic problems associated with the release of nickel ions. In this context, the design of beta-rich Ti-22Nb-10Zr (mass.%) coating by magnetron sputtering, with a non-linear elastic behavior and tunable mechanical properties, offers a novel approach for the development of a new biocompatible implants with self-adjusting mechanical properties. The XRD and TEM analyses reveal that microstructure consisting of hexagonal close-packed (alpha-phase), prevalent body-centered cubic (beta-phase) and orthorhombic (alpha ''-phase) nanograins, which can be tuned during the deposition by a single parameter - applied bias voltage as a result of the activation of a stress-induced martensitic transformation (beta -> alpha ''). We found that the minimum stress value to trigger the SIM transformation must be higher than 712 MPa (bias -63 V). The application of higher bias voltage values alters the main deformation mechanism, from a combination of reversible SIM transformation and mechanical twinning to dislocation slip, causing the compressive residual stresses to decrease from 712 to 120 MPa, the hardness increases from 2,1 to 4,1 GPa, and the coating stops showing low Young's modulus (<50 GPa) and non-linear elastic behavior.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20506 - Coating and films
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Surface & Coatings Technology
ISSN
0257-8972
e-ISSN
1879-3347
Volume of the periodical
405
Issue of the periodical within the volume
January
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
10
Pages from-to
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UT code for WoS article
000604583200088
EID of the result in the Scopus database
2-s2.0-85097330459