[NiEn 3 ](MoO 4 ) 0.5 (WO 4 ) 0.5 Co-Crystals as Single-Source Precursors for Ternary Refractory Ni-Mo-W Alloys

[NiEn 3 ](MoO 4 ) 0.5 (WO 4 ) 0.5 Co-Crystals as Single-Source Precursors for Ternary Refractory Ni-Mo-W Alloys

The co-crystallisation of [NiEn ](NO ) (En = ethylenediamine) with Na MoO and Na WO from a water solution results in the formation of [NiEn ](MoO ) (WO ) co-crystals. According to the X-ray diffraction analysis of eight single crystals, the parameters of the hexagonal unit cell (space group -31 , =...

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Veröffentlicht in:Nanomaterials (Basel, Switzerland) Switzerland), 2021-12, Vol.11 (12), p.3272
Hauptverfasser: Serebrennikova, Polina S, Komarov, Vladislav Y, Sukhikh, Aleksandr S, Khranenko, Svetlana P, Zadesenets, Andrey V, Gromilov, Sergey A, Yusenko, Kirill V
Format: Artikel
Sprache:eng
Schlagworte:
Alloys
Cocrystallization
complex salts
Crystallization
Crystals
Decomposition
Diffraction
Ethylenediamine
Investigations
molybdate anion
Molybdenum
Nickel
Radiation
Refractory alloys
Sensors
Single crystals
single-source precursors
Sodium molybdate
Sodium tungstate
Software packages
Ternary systems
Thermal decomposition
tungstate anion
Unit cell
X-ray diffraction
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Zusammenfassung:The co-crystallisation of [NiEn ](NO ) (En = ethylenediamine) with Na MoO and Na WO from a water solution results in the formation of [NiEn ](MoO ) (WO ) co-crystals. According to the X-ray diffraction analysis of eight single crystals, the parameters of the hexagonal unit cell (space group -31 , = 2) vary in the following intervals: a = 9.2332(3)-9.2566(6); c = 9.9512(12)-9.9753(7) Å with the Mo/W ratio changing from 0.513(3)/0.487(3) to 0.078(4)/0.895(9). The thermal decomposition of [NiEn ](MoO ) (WO ) individual crystals obtained by co-crystallisation was performed in He and H atmospheres. The ex situ X-ray study of thermal decomposition products shows the formation of nanocrystalline refractory alloys and carbide composites containing ternary Ni-Mo-W phases. The formation of carbon-nitride phases at certain stages of heating up to 1000 °C were shown.
ISSN:2079-4991
2079-4991
DOI:10.3390/nano11123272