Effect of substrate bias voltage on the mechanical properties and deformation mechanisms in the nanostructured Ti-22Nb-10Zr coating

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/68407700:21340/21:00347047 RIV/00216208:11320/21:10437537

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of substrate bias voltage on the mechanical properties and deformation mechanisms in the nanostructured Ti-22Nb-10Zr coating

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Effect of substrate bias voltage on the mechanical properties and deformation mechanisms in the nanostructured Ti-22Nb-10Zr coating

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20506 - Coating and films

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Surface & Coatings Technology

ISSN

0257-8972

e-ISSN

1879-3347

Svazek periodika

405

Číslo periodika v rámci svazku

January

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

10

Strana od-do

—

Kód UT WoS článku

000604583200088

EID výsledku v databázi Scopus

2-s2.0-85097330459