The transformation of α-Fe into γ′-Fe4N in nanocrystalline Fe-N system: Influence of Gibbs-Thomson effect

被引：21
作者：
Moszynski, Dariusz [1 ]
Moszynska, Izabela [1 ]
Arabczyk, Walerian [1 ]
机构：
[1] West Pomeranian Univ Technol, Inst Inorgan Chem Technol & Environm Engn, PL-70322 Szczecin, Poland
来源：
APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 25期
关键词：
IRON CATALYST; PHASE; REDUCTION; SIZE; NITRIDES; NITROGEN; DIAGRAM;
D O I：
10.1063/1.4851155
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A nanocrystalline iron sample of non-uniform grain size distribution was nitrided at 500 degrees C under gas atmosphere with gradually increased nitriding potential. Mixtures of alpha-Fe and gamma'-Fe4N phases were observed at a broad range of the nitriding potential. Unexpectedly, the mean size of the product's crystallites at small conversion degrees was much higher than the one observed initially for the substrate and gradually decreased with the advancement of the reaction. The observed behavior was explained by the reaction mechanism regarding the influence of the Gibbs-Thomson effect. (C) 2013 AIP Publishing LLC.
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页数：4
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