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Crystals
Special Issues
Novelties in Solidification Techniques of Single-Crystalline Materials
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Novelties in Solidification Techniques of Single-Crystalline Materials

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Inorganic Crystalline Materials".

Deadline for manuscript submissions: closed (28 December 2023) | Viewed by 4134

Special Issue Editors

Dr. Jacek Krawczyk

E-Mail Website
Guest Editor
Institute of Materials Engineering, Faculty of Science and Technology, University of Silesia in Katowice, 75 Pułku Piechoty 1a St., 41-500 Chorzów, Poland
Interests: superalloys; single-crystals; X-ray diffraction topography; structural defects; crystal growth
Special Issues, Collections and Topics in MDPI journals
Dr. Dariusz Szeliga

E-Mail Website
Guest Editor
Department of Materials Science / R&D Laboratory for Aerospace Materials, Rzeszow University of Technology, Rzeszow, Poland
Interests: superalloys; foundry; crysallization form liquide phase; directional solidification; single crystal castings; numerical simulation of solidification process

Special Issue Information

Dear Colleagues,

Single-crystalline materials are widely used in many modern industries, such as aerospace, defense, automotive, energy, and electronics. Despite the more complicated and expensive process of designing and obtaining single-crystalline materials, they are often the only possibility to obtain the required properties. For example, multiphase composition single-crystalline materials have much higher strength parameters than their polycrystalline substitutes.

The properties of single-crystalline materials largely depend on their preparation method, technology, and parameters. The defect structure formed during crystallization may be influenced by many factors, e.g., obtaining the desired crystal orientation, types and amounts of impurities, crucible material, etc.

The above dependencies, combined with the need to obtain single-crystalline materials with still new, different, and better properties, make it necessary to modify their production technology or create new solidification methods. Research results on this topic can create an interesting collection of articles on a wide range of aspects of the solidification technology of single-crystalline materials, in both model and practical research.

"Novelties in Solidification Techniques of Single-Crystalline Materials", as a Special Issue of Crystals, can report on the novelties in the technology of obtaining single-crystalline materials and the effects of their application, summarizing the progress achieved in recent years. In the following Special Issue, we will focus on pioneering and innovative works on obtaining strictly single-crystals and multiphase single-crystalline materials.

Dr. Jacek Krawczyk
Dr. Dariusz Szeliga
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. Crystals 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 2100 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

  • single-crystals
  • crystals growth
  • crystallization
  • directional crystallization
  • growth modeling

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Published Papers (2 papers)

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Research

13 pages, 34550 KiB  
Article
Single Crystal Growth and Nano-Structure Study in a Topological Dirac Metal, CoTe2-δ
by Lei Chen, Weiyao Zhao and Ren-Kui Zheng
Crystals 2024, 14(1), 46; https://doi.org/10.3390/cryst14010046 - 28 Dec 2023
Viewed by 2008
Abstract
A single crystal of a topological material, CoTe2-δ, has been grown via the chemical vapor transport method for a structural and electronic transport study. Single-crystal X-ray diffraction, powder X-ray diffraction, and high-resolution scanning electron microscope measurements confirm the high quality of [...] Read more.
A single crystal of a topological material, CoTe2-δ, has been grown via the chemical vapor transport method for a structural and electronic transport study. Single-crystal X-ray diffraction, powder X-ray diffraction, and high-resolution scanning electron microscope measurements confirm the high quality of the as-grown single crystals. In a high-resolution scanning electron microscopy study, a clear layered feature of the trigonal CoTe2-δ crystal was observed. Fractal features and mosaic-type nanostructures were observed on the as-grown surface and cleaved surface, respectively. The trigonal CoTe2-δ demonstrates a metallic ground state in transport measurements, with a typical carrier’s concentration in a 1021 cm−3 magnitude and a residual resistivity ratio of 1.6. Below 10 K, trigonal CoTe2-δ contains quite complicated magnetoresistance behavior as a result of the competing effect between Dirac states and possible spin fluctuations. Full article
(This article belongs to the Special Issue Novelties in Solidification Techniques of Single-Crystalline Materials)
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17 pages, 1983 KiB  
Article
Global Instability of Rod Eutectic Growth in Directional Solidification
by Yanlin Gan and Xiangming Li
Crystals 2023, 13(3), 548; https://doi.org/10.3390/cryst13030548 - 22 Mar 2023
Cited by 1 | Viewed by 1609
Abstract
In our previous work, we obtained the uniformly valid asymptotic solution of a cylindrical rod eutectic. In order to further study the critical point of the stable growth of a rod eutectic, we have considered the unsteady growth of a rod eutectic on [...] Read more.
In our previous work, we obtained the uniformly valid asymptotic solution of a cylindrical rod eutectic. In order to further study the critical point of the stable growth of a rod eutectic, we have considered the unsteady growth of a rod eutectic on the basis of the steady solution of the rod eutectic. Based on the experimental system of rod eutectic growth, combined with solidification thermodynamics and kinetics, the unsteady mathematical model of the rod eutectic was established. We used the asymptotic analysis method to seek the analytical solution of the mathematical model and used the nonlinear stability analysis theory to analyze the analytical solution and establish the corresponding disturbance model. We obtained the analytic form of the global mode solution and the corresponding quantization conditions and find that there is a stable growth mode, namely the mode (ST-mode), for rod eutectic growth; when ε<εST0, the rod eutectic growth is stable, when ε>εST0, the rod eutectic growth is unstable and when ε=εST0, the rod eutectic growth is of a neutral stability. The critical eutectic spacing of succinonitrile(D)camphor (SCN-DC) predicted by us is smaller than that predicted by Jackson–Hunt, which is consistent with the corresponding experimental data. Finally, we found that the critical eutectic spacing and stable region of rod eutectic growth changed little with the temperature gradient. Full article
(This article belongs to the Special Issue Novelties in Solidification Techniques of Single-Crystalline Materials)
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