Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/103378
DC Field | Value | Language |
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dc.contributor.author | Silva, Gabriel Santos | - |
dc.contributor.author | Maj, Lukasz | - |
dc.contributor.author | Morgiel, Jerzy | - |
dc.contributor.author | Vieira, Maria Teresa | - |
dc.contributor.author | Ramos, Ana Sofia | - |
dc.date.accessioned | 2022-11-09T10:24:28Z | - |
dc.date.available | 2022-11-09T10:24:28Z | - |
dc.date.issued | 2022-01-24 | - |
dc.identifier.issn | 1996-1944 | pt |
dc.identifier.uri | https://hdl.handle.net/10316/103378 | - |
dc.description.abstract | The aim of this research work was to optimize the coating of tungsten wires with reactive multilayer thin films and promote an exothermic self-propagating reaction. The ultimate goal is to use this heat to liquify low melting temperature materials, and thus block crack propagation in metallic materials. Ni/Me (Me = Al, Ti) multilayers were deposited by a DC (direct current) magnetron sputtering onto tungsten wires with diameters of 0.05 and 0.20 mm. The depositions were carried out to obtain films with near equiatomic average chemical composition and a modulation period (bilayer thickness) between 20 and 50 nm. The cross-section of the films was analyzed using electron microscopy before and after electrical ignition. A new substrate holder was developed to improve the quality of the Al/Ni films, allowing a reduction in the defects previously observed. The Ni/Ti thin films showed no discernible defects, regardless of the substrate holder. However, after ignition, the Ni + Ti reaction occurred in a non-self-propagating mode. Passing an electric current through a wire (ϕ = 0.05 mm) coated with an Al/Ni thin film, promoted a flash of light that was associated with the start of a self-propagating reaction. The reaction product was a B2-AlNi intermetallic phase. W wires coated with reactive multilayers may contribute to crack filling, and have potential to be self-healing actuators. | pt |
dc.language.iso | eng | pt |
dc.relation | PTDC/CTM-CTM/29101/2017 | pt |
dc.relation | POCI- 01-0145-FEDER-029101 | pt |
dc.relation | info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB/00285/2020 | pt |
dc.relation | PTDC/CTM-CTM/31579/2017 | pt |
dc.rights | openAccess | pt |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | pt |
dc.subject | multilayer thin films | pt |
dc.subject | sputtering | pt |
dc.subject | TEM (transmission electron microscopy) | pt |
dc.subject | self-propagating reactions | pt |
dc.subject | liquid phase actuators | pt |
dc.title | Development of Actuators for Repairing Cracks by Coating W Wires with Reactive Multilayers | pt |
dc.type | article | - |
degois.publication.firstPage | 869 | pt |
degois.publication.issue | 3 | pt |
degois.publication.title | Materials | pt |
dc.peerreviewed | yes | pt |
dc.identifier.doi | 10.3390/ma15030869 | pt |
degois.publication.volume | 15 | pt |
dc.date.embargo | 2022-01-24 | * |
uc.date.periodoEmbargo | 0 | pt |
item.languageiso639-1 | en | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.grantfulltext | open | - |
item.fulltext | Com Texto completo | - |
item.cerifentitytype | Publications | - |
item.openairetype | article | - |
crisitem.project.grantno | Centre for Mechanical Enginnering, Materials and Processes | - |
crisitem.author.researchunit | CEMMPRE - Centre for Mechanical Engineering, Materials and Processes | - |
crisitem.author.researchunit | CEMMPRE - Centre for Mechanical Engineering, Materials and Processes | - |
crisitem.author.researchunit | CEMMPRE - Centre for Mechanical Engineering, Materials and Processes | - |
crisitem.author.orcid | 0000-0001-9981-3826 | - |
crisitem.author.orcid | 0000-0002-8486-5436 | - |
Appears in Collections: | I&D CEMMPRE - Artigos em Revistas Internacionais |
Files in This Item:
File | Description | Size | Format | |
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Development-of-Actuators-for-Repairing-Cracks-by-Coating-W-Wires-with-Reactive-MultilayersMaterials.pdf | 6.34 MB | Adobe PDF | View/Open |
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This item is licensed under a Creative Commons License