Low-Temperature Approach to Synthesize Iron Nitride from Amorphous Iron

2008 ◽  
Vol 47 (4) ◽  
pp. 1261-1263 ◽  
Author(s):  
Yi Han ◽  
Huamin Wang ◽  
Minghui Zhang ◽  
Ming Su ◽  
Wei Li ◽  
...  
Keyword(s):  
Low Temperature ◽  
Iron Nitride ◽  
Amorphous Iron

ChemInform Abstract: Low-Temperature Approach to Synthesize Iron Nitride from Amorphous Iron.

ChemInform ◽  
2008 ◽  
Vol 39 (18) ◽  
Author(s):  
Yi Han ◽  
Huamin Wang ◽  
Minghui Zhang ◽  
Ming Su ◽  
Wei Li ◽  
...  
Keyword(s):  
Low Temperature ◽  
Iron Nitride ◽  
Amorphous Iron

Self-diffusion of iron in amorphous iron nitride

2002 ◽  
Vol 65 (21) ◽  
Author(s):  
Mukul Gupta ◽  
Ajay Gupta ◽  
S. Rajagopalan ◽  
A. K. Tyagi
Keyword(s):  
Iron Nitride ◽  
Amorphous Iron ◽  
Self Diffusion

Implication of iron nitride species to enhance the catalytic activity and stability of carbon nanotubes supported Fe catalysts for carbon-free hydrogen production via low-temperature ammonia decomposition

2018 ◽  
Vol 8 (3) ◽  
pp. 907-915 ◽  
Author(s):  
Hui Zhang ◽  
Qinmei Gong ◽  
Shan Ren ◽  
Mahmood Ali Arshid ◽  
Wei Chu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Catalytic Activity ◽  
Low Temperature ◽  
Hydrogen Production ◽  
Ammonia Decomposition ◽  
Iron Nitride ◽  
Wet Impregnation ◽  
Free Hydrogen ◽  
Fe Catalysts

This study prepared the Fe2N/CNTs catalysts by using wet-impregnation and followed by nitrogenization, for carbon-free hydrogen production from NH3 decomposition.

Microstructural investigation of iron nitride layers formed by low-temperature gaseous nitriding

1999 ◽  
Vol 14 (6) ◽  
pp. 2674-2679 ◽  
Author(s):  
D. K. Inia ◽  
A. M. Vredenberg ◽  
D. O. Boerma ◽  
F. D. Tichelaar ◽  
H. Schut ◽  
...  
Keyword(s):  
Low Temperature ◽  
Iron Nitride ◽  
Depth Range ◽  
Elastic Recoil ◽  
Cross Sectional ◽  
Microstructural Investigation ◽  
Elastic Recoil Detection ◽  
Growth Modes ◽  
Gaseous Nitriding ◽  
Nitride Layers

Iron nitride layers were formed by a novel low-temperature gaseous nitriding process. Nitriding occurs at a temperature of 325 °C through NH3 decomposition at the surface of Ni (25 nm) coated Fe, followed by N transport through the Ni film into the underlying Fe, where nitride precipitation takes place. The role of Ni is to protect Fe from oxidation by gas impurities and to serve as a catalyst for NH3 decomposition. The precipitation behavior and the development of microstructure were studied by means of elastic recoil detection, cross-sectional transmission electron diffraction (XTEM), and positron annihilation (PA). From PA and XTEM no evidence was found for the occurrence of porosity during nitriding (an effect found at higher temperatures due to the decomposition of the nitrides into Fe and N2). XTEM showed that the original columnar α–Fe grains transform into smaller ′–Fe4N grains which subsequently transform into larger ε–Fe3−xN grains. This microstructural evolution of smaller ′ grains forming in the original columnar α–Fe structure occurs in one of two growth modes of the nitride in the Fe layer, i.e., throughout the entire depth range of the Fe layer, or preferentially at the Ni/Fe interface when an iron oxide layer is present at this interface.

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