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First Step in Exploration of Fe–Ga–N System for Efficient Crystallization of GaN at High N 2 Pressure
Author(s) -
Sadovyi Petro,
Sadovyi Bogdan,
Bockowski Michal,
Dziecielewski Igor,
Porowski Sylwester,
Grzegory Izabella
Publication year - 2018
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201700897
Subject(s) - crystallization , dissolution , solubility , materials science , nitrogen , analytical chemistry (journal) , inert gas , differential thermal analysis , atmospheric pressure , atmospheric temperature range , metal , solvent , thermodynamics , chemistry , metallurgy , diffraction , physics , oceanography , organic chemistry , chromatography , optics , composite material , geology
According to the existing data, iron is a very efficient solvent for nitrogen. In this work, the results of first steps toward crystallization of GaN from Fe‐based solutions at 1 GPa N 2 pressure are reported. Melting of Fe at 0.88 GPa N 2 pressure is studied by differential thermal analysis (DTA) which shows a strong (≈200 °C) decrease of melting temperature as compared to the well‐established value of 1570 °C for pure Fe at 0.88 GPa at inert atmosphere. The N content of about 11.9 at.% is found by ON836 LECO analyzer in the Fe samples after DTA. It means that the observed drop of T m (Fe) is related to the high solubility of nitrogen in Fe metal. Also the dissolution of GaN in Fe in 1370–1480 °C temperature range is studied. Encouragingly high (22–30 at.%) solubilities of Ga (direct measurement) and most probably, as high for N (evaluated from mass balance) are found.