High-Pressure Crystal Growth and Fabrications

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Crystal Engineering".

Deadline for manuscript submissions: closed (15 November 2022) | Viewed by 1871

Special Issue Editor


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Guest Editor
School of Physics, Beijing Institute of Technology, Beijing 100081, China
Interests: condensed matter physics; correlated electron systems; low-dimensional materials; high-pressure syntheses and physical properties

Special Issue Information

Dear Colleagues,

The physical properties of materials strongly depends on the arrangement of atoms and the strength of the bonds between them. Intriguing physical phenomena, such as high-temperature superconductivity and colossal magnetoresistance have been found serendipitously on new crystalline materials. Advanced techniques to fabricate materials on an atomic scale have been widely used in recent years; however, the growth of crystal structures with complex atomic orderings under ambient conditions is not realistic in most cases. A high-pressure technique is found to be a good alternative that allows growth of a wide range of materials, and a significant advantage of the technique is the avoidable presence of impurities in chemical substitution. Pressure, as one basic thermodynamic parameter, influences bonding and electron structures so as to control crystal structures and physical properties. Guided by the pressure effects on the subtle atomic ordering and interatomic interactions, much broader categories of materials with new crystal structures can be selectively stabilized under high pressure, exhibiting exotic physical properties that challenge our fundamental understanding in condensed matter physics and materials science. An important question that remains to be addressed is whether emerging high-pressure fabrication mechanisms can be established while high-quality growth conditions can be precisely controlled by improving existing techniques. If successful, new high-pressure products will help to resolve fundamental scientific questions, such as the interplay of spin-orbit coupling and electron–electron correlations in a crystal lattice. The purpose of present Special Issue “High-Pressure Crystal Growth and Fabrications” is to assemble the valuable progress on the high-pressure synthesis and characterization of novel materials to date.

Prof. Dr. Xiang Li
Guest Editor

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Keywords

  • high pressure
  • growth and fabrication
  • novel materials
  • crystal structures
  • physical properties

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Published Papers (1 paper)

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Research

10 pages, 2240 KiB  
Article
High-Pressure Solidification of Ternary Al-Ni-Sn Alloy
by Xiaohong Yang, Feng Lv, Xiaohong Wang, Zhengzhong Zhang, Dongdong Zhu, Yuan Chen, Jianya Ge and Jinhua Tang
Crystals 2022, 12(8), 1025; https://doi.org/10.3390/cryst12081025 - 23 Jul 2022
Viewed by 1535
Abstract
The microstructure, phase composition and mechanical properties of ternary Al-5.4Ni-2Sn (mass fraction) alloy solidified under different high pressures were researched. The results show that the phase composition of the alloy solidified at different pressures is Al, Al3Ni and β-Sn. The thermodynamic [...] Read more.
The microstructure, phase composition and mechanical properties of ternary Al-5.4Ni-2Sn (mass fraction) alloy solidified under different high pressures were researched. The results show that the phase composition of the alloy solidified at different pressures is Al, Al3Ni and β-Sn. The thermodynamic phase diagram of the ternary alloy Al-5.4Ni-2Sn was calculated under the equilibrium condition. The results demonstrate that the solidification process is as follows: L→Al3Ni→(α-Al + Al3Ni)eutectic→(α-Al + Al3Ni + β-Sn)eutectic. The hardness values of α-Al phase at ambient pressure, 2 GPa and 4 GPa are 1.5 GPa, 1.62 GPa and 1.99 GPa, respectively. This is an increase of 8% and 32.7%, respectively. The hardness of β-Sn phase decreases by about 31.2% at 4 GPa. When the deformation is 30%, the compressive strength at ambient pressure, 2 GPa and 4 GPa is 538.1 MPa, 1403.2 MPa and 1547.9 MPa, respectively. The compressive strength under high pressure increased by 160.85% and 187.7%, respectively. Full article
(This article belongs to the Special Issue High-Pressure Crystal Growth and Fabrications)
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