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Grain Boundary Wetting Phenomena in High Entropy Alloys Containing Nitrides, Carbides, Borides, Silicides, and Hydrogen: A Review

Straumal, Boris; Rabkin, Eugen; Lopez, Gabriel A.; Korneva, Anna; Kuzmin, Alexei; Gornakova, Alena; Straumal, Alexander; Baretzky, Brigitte


In this review, we analyze the structure of multicomponent alloys without principal components (they are also called high entropy alloys—HEAs), containing not only metals but also hydrogen, nitrogen, carbon, boron, or silicon. In particular, we discuss the phenomenon of grain boundary (GB) wetting by the melt or solid phase. The GB wetting can be complete or incomplete (partial). In the former case, the grains of the matrix are completely separated by the continuous layer of the second phase (solid or liquid). In the latter case of partial GB wetting, the second solid phase forms, between the matrix grains, a chain of (usually lenticular) precipitates or droplets with a non-zero value of the contact angle. To deal with the morphology of GBs, the new GB tie-lines are used, which can be constructed in the two- or multiphase areas of the multidimensional HEAs phase diagrams. The GBs in HEAs in the case of complete or partial wetting can also contain hydrides, nitrides, carbides, borides, or silicides. Thus, GB wetting by the hydrides, nitrides, carbides, borides, or silicides can be used in the so-called grain boundary chemical engineering in order to improve the properties of respective HEAs.

Verlagsausgabe §
DOI: 10.5445/IR/1000142487
Veröffentlicht am 27.01.2022
DOI: 10.3390/cryst11121540
Zitationen: 13
Web of Science
Zitationen: 10
Zitationen: 13
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 09.12.2021
Sprache Englisch
Identifikator ISSN: 2073-4352
KITopen-ID: 1000142487
HGF-Programm 43.31.01 (POF IV, LK 01) Multifunctionality Molecular Design & Material Architecture
Erschienen in Crystals
Verlag MDPI
Band 11
Heft 12
Seiten Art.-Nr. 1540
Bemerkung zur Veröffentlichung This article belongs to the Special Issue High-Entropy Materials
Gefördert durch den KIT-Publikationsfonds
Nachgewiesen in Dimensions
Web of Science
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