Evaluation of bias voltage-dependent mechanical properties of amorphous TiSi2 thin films on PEEK by nano-characterization techniques

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F21%3A00346658" target="_blank" >RIV/68407700:21230/21:00346658 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.surfcoat.2021.126859" target="_blank" >https://doi.org/10.1016/j.surfcoat.2021.126859</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.surfcoat.2021.126859" target="_blank" >10.1016/j.surfcoat.2021.126859</a>

Result language
angličtina
Original language name
Evaluation of bias voltage-dependent mechanical properties of amorphous TiSi2 thin films on PEEK by nano-characterization techniques
Original language description
Thin films on PEEK have been designing by magnetron sputtering, using bias voltages ranging from -31 to -157 V. The X-ray diffraction and EDX show how the amorphous films resulting have an elemental composition very close to the stoichiometry TiSi2. The AFM and SEM performed on top and cross-section, respectively, of film reveal a smooth and uniform surface, free of pores and cracks, and a compact microstructure. The evaluation of the resolved shear stress, yield strength, hardness, scratch resistance, and fracture toughness show how these values increase in the TiSi2/PEEK system as the bias voltage increase. The development of these hard and tough thin films has enabled the fracture toughness achieved by the TiSi2/PEEK system increase when a bias voltage equal to or higher than -108 V is used during the deposition process. For these bias conditions, the compressive residual stresses generated are large enough to prevent crack nucleation. The increase of the crack resistance gives as a result that KI reaches values above 32 MPa*m1/2. This value is much greater than those values corresponding to the classic ceramic coatings, such as Al2O3 (4.6 MPa*m1/2) and ZrO2 (7.6 MPa*m1/2).
Czech name
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Czech description
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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

Project
<a href="/en/project/GP14-32801P" target="_blank" >GP14-32801P: Novel preparation route of metallic coatings for medical applications</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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