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Selected Papers from Junior EUROMAT 2022 Conference

A special issue of Materials (ISSN 1996-1944).

Deadline for manuscript submissions: closed (30 November 2022) | Viewed by 6594

Special Issue Editors


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Guest Editor
Department of Mechanical Engineering, University of Coimbra, Rua Luis Reis Santos, 3030-788 Coimbra, Portugal
Interests: thin-film composites; surface engineering; coatings; biomaterials; food packaging; nanoparticles; corrosion; wear; sensors; antimicrobial; osseointegration; anodization; cutting tools; self-cleaning
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Institut Européen Des Membranes, IEM, UMR 5635, Univ Montpellier, CNRS, ENSCM, CEDEX 5, 34095 Montpellier, France
Interests: 2D materials; electrocatalysis; membranes; energy; CO2 conversion
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Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy
Interests: batteries; post-lithium batteries, electrochemical nitrogen reduction; hybrid photovoltaics; biosourced polymers; dye-sensitized solar cells; integrated energy devices polymer electrolytes; sustainable ammonia production
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

On behalf of the organizing committee, it is our great pleasure to invite you to Junior Euromat 2022 to be held in Coimbra, Portugal, from 19 to 22nd July 2022. In the aim of this conference dedicated to young researchers, a Special Issue will be published in MDPI’s Open Access journal Materials. Your works presented at the conference can be submitted to this Special Issue of Materials. A rigorous peer reviewing process will be carried out before publication. Special publication rates will be offered to the conference participants (see https://junioreuromat.org/ for further information). The general areas of the conference, which are also the representative ones for publication in this Special Issue, are: (i) Functional Materials (ii) Structural materials (iii) Processing technologies (iv) Characterization and Modelling (v) Materials for Sustainability

We sincerely hope that you will attend Junior Euromat 2022 and you will accept this invitation to publish your works in this Special Issue.

See you at Coimbra

Prof. Dr. Sandra Carvalho
Dr. Damien Voiry
Dr. Federico Bella
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • nanomaterials smart and self-healing materials
  • biomaterials
  • sensors & actuators
  • photonics and plasmonics
  • metamaterials
  • alloys
  • advanced ceramics
  • carbon based materials
  • composites and nanocomposites
  • fatigue
  • wear and corrosion
  • additive manufacturing
  • materials addressing the 3R (Reduce, Reuse, Recycle)
  • circular economy
  • multiscale and multiphysics modelling of materials
  • processes and products
  • advanced characterization techniques

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Published Papers (3 papers)

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17 pages, 11026 KiB  
Article
Assessment of Two Advanced Aluminium-Based Metal Matrix Composites for Application to High Energy Physics Detectors
by Katie Elizabeth Buchanan, Stefano Sgobba, Michal Dalemir Celuch, Francisco Perez Gomez, Antti Onnela, Pierre Rose, Hans Postema, Mariano Pentella, Guillaume Lacombe, Benjamin Thomas, Renaud de Langlade and Yvan Paquin
Materials 2023, 16(1), 268; https://doi.org/10.3390/ma16010268 - 27 Dec 2022
Cited by 1 | Viewed by 2081
Abstract
The Outer Tracker of the Compact Muon Solenoid (CMS), one of the large experiments at the CERN Large Hadron Collider, will consist of about 13,200 modules, each built up of two silicon sensors. The modules and support structures include thousands of parts that [...] Read more.
The Outer Tracker of the Compact Muon Solenoid (CMS), one of the large experiments at the CERN Large Hadron Collider, will consist of about 13,200 modules, each built up of two silicon sensors. The modules and support structures include thousands of parts that contribute to positioning and cooling the sensors during operation at −30 °C. These parts should be low mass while featuring high thermal conductivity, stiffness and strength. Their thermal expansion coefficient should match that of silicon to avoid deformations during cooling cycles. Due to their unique thermal and mechanical properties, aluminium-carbon fibre (Al/Cf) Metal Matrix Composites are the material of choice to produce such light and stable thermal management components for High Energy Physics detectors. For the CMS Outer Tracker, about 500,000 cm3 of Al/Cf raw material will be required to be produced through a reliable process to guarantee consistent properties throughout parts manufacturing. Two Al/Cf production routes are currently considered: liquid casting by gas-pressure infiltration and a powder metallurgy process based on continuous semi-liquid phase sintering. The dimensional stability of the resulting material is of paramount importance. Irreversible change of shape may be induced by moisture adsorption and the onset of galvanic corrosion at the discontinuous interfaces between Cf and Al. This paper presents the results of an extensive investigation through Computed Microtomography, direct microscopical investigations, analysis of the interfaces and metrology measurements aimed at comparing and interpreting the response to different environments of the respective products. The results obtained confirm the suitability of the two investigated Al/Cf MMCs for application to components of the CMS Outer Tracker, requiring tight geometrical control and microstructural stability over time. However, for PM parts sintered through the semi-liquid phase process, a multilayered protective noble metal coating is necessary the make them impervious to moisture, allowing dimensional stability to be guaranteed and the onset of corrosion phenomena to be avoided, while the product obtained by gas-pressure infiltration has shown less sensitive even to extreme temperature-humidity cycles and may be used uncoated. Full article
(This article belongs to the Special Issue Selected Papers from Junior EUROMAT 2022 Conference)
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8 pages, 2120 KiB  
Article
Relation between Mechanical Hardening and Nitrogen Profile of PBII Nitrided Titanium Alloy
by Valérie Parry, Eric Le Bourhis, Luc Pichon and Michel Drouet
Materials 2022, 15(24), 9028; https://doi.org/10.3390/ma15249028 - 17 Dec 2022
Cited by 3 | Viewed by 1423
Abstract
Surface treatments of Ti-6Al-4V alloys are of utmost importance for biomedical applications since they allow for tribological gain. Here, Ti-6Al-4V disks have been PBII nitrided at either 500, 600, 700 and 800 °C. A set of techniques (XRD, SEM-EDS, EBSD and GDOES) was [...] Read more.
Surface treatments of Ti-6Al-4V alloys are of utmost importance for biomedical applications since they allow for tribological gain. Here, Ti-6Al-4V disks have been PBII nitrided at either 500, 600, 700 and 800 °C. A set of techniques (XRD, SEM-EDS, EBSD and GDOES) was used to characterize the surface microstructural and chemical changes. Nanoindentation was used to assess the induced changes in terms of mechanical properties. Two types of nitrided domains are revealed. Starting from the surface, a nitride bilayer composed of δ-TiN/ϵ-Ti2N with enhanced surface resistance is supported by an α-Ti(N) solid solution formed at depth. Hardness values peak at 12–14 GPa at the surface, which is almost twice as large as the bulk value (about 7 GPa). For the moderate temperatures used here, a deep (10–15 µm) and strong hardness (14 GPa) enhancement together with a smooth gradient can be achieved. Full article
(This article belongs to the Special Issue Selected Papers from Junior EUROMAT 2022 Conference)
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14 pages, 4585 KiB  
Article
Non-Wetting and Non-Reactive Behavior of Liquid Pure Magnesium on Pure Tungsten Substrates
by Sylwia Terlicka, Paweł Darłak, Natalia Sobczak and Jerzy J. Sobczak
Materials 2022, 15(24), 9024; https://doi.org/10.3390/ma15249024 - 17 Dec 2022
Cited by 7 | Viewed by 1930
Abstract
The wetting behavior of liquid magnesium drop on pure tungsten substrates was investigated, for the first time, with the sessile drop method combined with non-contact heating and capillary purification of a Mg drop from a native oxide film. A specially designed apparatus dedicated [...] Read more.
The wetting behavior of liquid magnesium drop on pure tungsten substrates was investigated, for the first time, with the sessile drop method combined with non-contact heating and capillary purification of a Mg drop from a native oxide film. A specially designed apparatus dedicated to the investigation of the high-temperature interaction of dissimilar materials was used. The comparative experiments were performed under isothermal conditions at temperatures of 700 °C and 740 °C using two atmospheres: Ar + 5 wt.% H2 and pure Ar, respectively. During high-temperature tests for 180 s, the images of the Mg/W couples were recorded with CCD cameras (57 fps) from two directions of observation. The solidified drop/substrate couples were subjected to structural characterization using scanning electron microscopy (SEM) coupled with energy-dispersive X-ray spectroscopy (EDS). Under the applied measurement conditions, liquid Mg revealed non-wetting behavior on W substrates (a contact angle θ > 90°). The average value of the contact angle under the flowing Ar atmosphere at 740 °C was θav = 115°, whereas it was higher under the flowing Ar + 5 wt.%. H2 atmosphere at a lower temperature of 700 °C, showing θav = 122°. Independently on employed atmosphere and temperature, SEM + EDS analysis of solidified sessile drop couples did not display any new phases and mass transfer between the Mg drop and the W substrate, whereas the presence of discontinuities at the Mg/W interface of cross-sectioned couples were well-distinguished. Non-wetting and a lack of permanent bonding between the Mg drop and W substrates have a good agreement with the Mg–W phase diagram calculated with the help of FactSage software and FTlite database, i.e., the non-reactive nature of the Mg/W couple because W does not dissolve in liquid Mg and it does not form any compounds with Mg. These findings allow for the recommendation of tungsten as a suitable refractory material for long-time contact with liquid Mg in different container-assisted methods of materials characterization as well as in liquid-assisted processing of Mg components. Full article
(This article belongs to the Special Issue Selected Papers from Junior EUROMAT 2022 Conference)
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