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Metals
Special Issues
Metal-Ceramic and Metal-Metal Interactions and Joining
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Metal-Ceramic and Metal-Metal Interactions and Joining

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Welding and Joining".

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 8201

Special Issue Editors

Dr. Donatella Giuranno

E-Mail Website
Guest Editor
Institute of Condensed Matter Chemistry and Technologies for Energy (ICMATE), National Research Council of Italy (CNR), Via De Marini 6, 16149 Genoa, Italy
Interests: metals and alloys; metal–metal and metal–ceramic interactions; advanced materials and composites
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Fabrizio Valenza

E-Mail Website
Guest Editor
National Research Council of Italy-Institute of Condensed Matter Chemistry and Technologies for Energy
Interests: wetting by liquid metals; metal–ceramic interactions at high temperatures; metal–ceramic joining technology

Special Issue Information

Dear Colleagues,

Studies on the relevant liquid–solid interactions in metal–metal and metal–ceramic systems are crucial steps in the design and optimization of industrial liquid-assisted processes at high temperatures, such as the production of reliable metal–ceramic joints or high-performing composite materials.

In any process involving metallic melts, the long-term reliability of the products is strictly related to the developed microstructures, which is in turn determined by the characteristics of the dissimilar phases involved in terms of thermophysical properties, interfacial characteristics, reactivity, and process parameters selected.

This Special Issue aims to stimulate researchers worldwide to share their systematic studies, addressing both basic (wettability, interfacial tension, and phase equilibria determination) and application (e.g., joining by brazing) aspects. Particular consideration will be made to studies aimed at elucidating the role that dissolution, chemical reactions, and additions of active metal elements to the molten matrix have in wetting processes and on solid–liquid adhesion in relation to the desired final properties.

For this purpose, original research articles, review articles, and significant preliminary communications are invited, with particular interest in articles describing current research trends and future perspectives in the manufacture of tailored advanced materials for highly demanding applications.

Potential topics include, but are not limited to, the following:

-Surfaces and interfaces at high temperatures;

-Wetting at high temperatures;

-Grain boundaries at high temperatures;

-Liquid-metal penetration;

-Thermodynamic studies;

-Microstructural analyses;

-Soldering, brazing, and joining processes;

-Liquid and solid-state reactivity;

-Liquid/solid interfaces in metallurgical processes (e.g., casting).

Prof. Dr. Donatella Giuranno
Prof. Dr. Fabrizio Valenza
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. Metals is an international peer-reviewed open access monthly 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

  • Metal–metal and metal–ceramic interfaces
  • Intermetallics
  • Phase diagrams
  • Modeling
  • Diffusion
  • Wetting by liquid metals
  • Brazing

Published Papers (3 papers)

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Research

10 pages, 2832 KiB  
Article
An Investigation of Atomic Interaction between Ag and Ti2AlC under the Processing Temperature of 1080 °C
by Guochao Wang, Yafei Li, Weijian Chen, Jianguo Yang, Jie Zhang and Yanming He
Metals 2021, 11(12), 1963; https://doi.org/10.3390/met11121963 - 6 Dec 2021
Cited by 8 | Viewed by 2105
Abstract
Ti2AlC is a typical MAX (M: early transition metal, A: main group element, and X: carbon and/or nitrogen) phase with ceramic and metallic properties due to its unique nano-layered structure. In order to investigate the interaction behavior between Ag and Ti [...] Read more.
Ti2AlC is a typical MAX (M: early transition metal, A: main group element, and X: carbon and/or nitrogen) phase with ceramic and metallic properties due to its unique nano-layered structure. In order to investigate the interaction behavior between Ag and Ti2AlC, a sessile drop experiment was conducted at 1080 °C for 5 min. The atomic rearrangement occurred at the Ag–Ti2AlC interface was revealed using high-angle annular dark-field scanning transmission electron microscopy coupled with high-resolution transmission electron microscopy analysis. The results show that Ag nanoclusters generally appeared in most of the Ag–Ti2AlC interaction regions thermally processed at 1080 °C. In addition, Ag can also substitute for Al and Ti atoms in the Ti2AlC, promoting local structural decomposition of the Ti2AlC and producing 4H–Ag with a hexagonal close-packed (hcp) structure. Additionally, Al atoms released from the Ti2AlC lattices can dissolve locally into the liquid Ag, particularly at the grain boundaries. When the loss concentration of Al exceeded the critical level, the Ti2AlC started to decompose and the residual Ti6C octahedrons and Al atoms recombined, giving rise to the production of anti-perovskite Ti3AlC with a cubic structure. Lastly, the discrepancy in substitution behavior of Ag in the Ti2AlC was compared when thermally processed at different temperatures (1030 °C and 1080 °C). This work contributes to the understanding of the intrinsic stability of Ti2AlC MAX ceramics under high-temperature treatment. Full article
(This article belongs to the Special Issue Metal-Ceramic and Metal-Metal Interactions and Joining)
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9 pages, 3068 KiB  
Article
Joining of Metal to Ceramic Plate Using Super-Spread Wetting
by Jaebong Yeon, Michiru Yamamoto, Peiyuan Ni, Masashi Nakamoto and Toshihiro Tanaka
Metals 2020, 10(10), 1377; https://doi.org/10.3390/met10101377 - 15 Oct 2020
Cited by 4 | Viewed by 2666
Abstract
Ceramic-metal composites with novel performance are desirable materials; however, differences in their properties result in difficulties in joining. In this study, the joining of metal to ceramic is investigated. We recently succeeded in causing super-spread wetting on the surface fine crevice structures of [...] Read more.
Ceramic-metal composites with novel performance are desirable materials; however, differences in their properties result in difficulties in joining. In this study, the joining of metal to ceramic is investigated. We recently succeeded in causing super-spread wetting on the surface fine crevice structures of metal surfaces produced by both laser irradiation and reduction-sintering of oxide powders. In this work, joining copper onto an Al2O3 plate was achieved by taking advantage of super-spread wetting. Fe2O3 powder was first sintered under reducing conditions to produce a microstructure which can cause super-spread wetting of liquid metal on an Al2O3 plate. A powder-based surface fine crevice structure of metallic iron with high porosity was well-formed due to the bonding of the reduced metallic iron particles. This structure was joined on an Al2O3 plate with no cracking by the formation of an FeAl2O4 layer buffering the mismatch gap between the thermal expansion coefficients of iron and Al2O3. We successfully achieved metalizing of the Al2O3 surface with copper without interfacial cracks using super-spread wetting of liquid copper through the sintered metallic iron layer on the Al2O3 plate. Then, laser irradiation was conducted on the surface of the copper-metalized Al2O3 plate. A laser-irradiated surface fine crevice structure was successfully created on the copper-metalized Al2O3 plate. Moreover, it was confirmed that the super-spread wetting of liquid tin occurred on the laser-irradiated surface fine crevice structure, finally accomplishing the joining of a copper block and the copper-metalized Al2O3. Full article
(This article belongs to the Special Issue Metal-Ceramic and Metal-Metal Interactions and Joining)
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7 pages, 3003 KiB  
Article
Bulk and Surface Low Temperature Phase Transitions in the Mg-Alloy EZ33A
by Alexander Straumal, Ivan Mazilkin, Kristina Tzoy, Boris Straumal, Krzysztof Bryła, Alexander Baranchikov and Gunther Eggeler
Metals 2020, 10(9), 1127; https://doi.org/10.3390/met10091127 - 21 Aug 2020
Cited by 44 | Viewed by 2506
Abstract
Low-temperature phase transitions in the EZ33A Mg-cast alloy have been investigated. Based on the structure assessment of the alloy after annealing at 150 °C (1826 h) and at 200 °C (2371 h) a grain boundary wetting transition by a second solid phase was [...] Read more.
Low-temperature phase transitions in the EZ33A Mg-cast alloy have been investigated. Based on the structure assessment of the alloy after annealing at 150 °C (1826 h) and at 200 °C (2371 h) a grain boundary wetting transition by a second solid phase was documented. Within a 50 °C temperature range, substantial differences in the α(Mg) grain boundary fraction wetted by the (Mg,Zn)12RE intermetallic were observed. In contrast to what was reported in the literature, two different types of precipitates were found within α(Mg) grains. With increasing annealing temperatures, both types of precipitates dissolved. Full article
(This article belongs to the Special Issue Metal-Ceramic and Metal-Metal Interactions and Joining)
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