**Preface**

This Special Issue entitled "Intermetallic Compound (Volume II)" contains seventeen articles of which one article is a review article. The articles presented are a continuation of the first part and focus on the broadly understood physical properties of intermetallic compounds.

In the first article, Halit Sub¨ utay et al. present experimental studies on the nature of ¨ the ball-milling mechanism in a ternary materials system (Mg-Sn-Na) for proper mechanical alloying. In 12 milling conditions, the homogenous secondary phase distribution is achieved, which eventually supplies the highest relative density (95%), modulus of elasticity (34.5 GPa), and hardness (89 HV) values in this ternary material system. In Dheyaa F. Kadhim et al.'s research, processing–structure–property relations were systematically investigated at room and elevated temperatures for two FCC Al0.3CoFeCrNi and Al0.3CuFeCrNi<sup>2</sup> high-entropy alloys. The structure, elastic properties and electronic structure of Ti-Al intermetallics including Ti3Al (space group P63/mmc), TiAl (space group I4/mmm) and TiAl3 (space group P4/mmm) are systematically studied by first-principles calculations by Fuyong Su et al. Tianyi Han et al.'s theoretical work presents Ginzburg–Landau analysis on the physical properties of the Kagome superconductor CsV3Sb5. In Lei Cao et al.'s research, the morphology and structure of V-rich carbides in V-bearing pig iron were studied, and the precipitation characteristics of V-rich carbides in molten iron were discussed. The next paper by Jingjing Wang et al. aims to develop a high-performance CA model incorporating the decentered square capture rule to simulate dendrite growth with different orientations more efficiently. Chenglu Jiang et al. present first-principles calculations of structural and mechanical properties of Cu–Ni alloys. Based on two-band Bogoliubov–de Gennes theory, Hai Huang et al. study the boundary effect of an interface between a two-gap superconductor FeSe and insulator. In Jonathan Gjerde and Radi A. Jishi's worl, the optical and magnetic properties of several rare-earth tellurides have been examined. In Milad Takhsha Ghahfarokhi et al.'s research, dewetting process has been investigated in shape-memory Heuslers. Christopher Dickens et al. use density functional theory to investigate Fe substitution in CuAlS2. The magnetocaloric effect in the TbCo2 -H system in the region of the Curie temperature was studied both by direct and indirect methods in external magnetic fields up to 1.4 and 14 T by Galina Politova et al. Hydrogen-induced order–disorder effects in FePd3 was presented by Holger Kohlmann et al. In N. V. Kostyuchenko's research, the peculiarities of the magnetization process in the ferrimagnetic intermetallic compound (Nd0.5Dy0.5)2Fe14B have been studied theoretically and experimentally using ultrahigh magnetic fields. Next theoretical paper by Sara J. Yahya et al. presents structural, elastic, magnetic and electronic properties of inverse and conventional Heusler (Co2CrAl, Cr2MnSb) compounds. In Junqing Han et al.'s work, boron particles with β-rhombohedral structure were prepared in Cu-4B alloy and the morphology and growth mechanism of β-B and pentagonal twins were analyzed. In the last article Santosh Sampath et al. present an overview on synthesis, processing and applications of Nickel aluminides.

I hope that the presented set both theoretical and experimental articles will arouse genuine interest among readers and, perhaps, push them to their own successful research in the field of intermetallic compounds.

Thanks to all contributing authors of this Special Issue and the Editorial staff of Crystals.

**Jacek Cwik ´** *Editor*
