Study of the effect of plasma-striking atmosphere on Fe-oxidation in thermal dc arc-plasma processing

Journal Article · Mon Nov 15 00:00:00 EST 2010 · Journal of Vacuum Science and Technology. A, International Journal Devoted to Vacuum, Surfaces, and Films

DOI:https://doi.org/10.1116/1.3504597· OSTI ID:22051160

Banerjee, I; Khollam, Y B; Mahapatra, S K; Das, A K; Bhoraskar, S V ^[1]

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1. Department of Applied Physics, Birla Institute of Technology, Mesra, Ranchi 835215, India and Department of Physics, University of Pune, Pune 41100 (India)

The effect of plasma-striking atmosphere: air and air+Ar-gas on the crystallization of Fe-oxide phases was studied using dc thermal arc-plasma processing route. The powders were characterized by x-ray diffraction, vibrating sample magnetometry, transmission electron microscopy, and Moessbauer spectroscopy techniques. At room temperature and O{sub 2} rich atmosphere, arc-evaporated Fe{sup 2+} ions oxidize into either {gamma}-Fe{sub 2}O{sub 3} or Fe{sub 3}O{sub 4} depending upon the combining ratio of Fe with molecular O{sub 2}. Fe/O ratio could be adjusted using proper flow rate of Ar gas to crystallize the pure {gamma}-Fe{sub 2}O{sub 3}.

• OSTI ID: 22051160
• Journal Information: Journal of Vacuum Science and Technology. A, International Journal Devoted to Vacuum, Surfaces, and Films, Vol. 28, Issue 6; Other Information: (c) 2010 American Vacuum Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1553-1813
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AIR
CRYSTALLIZATION
FLOW RATE
IRON IONS
IRON OXIDES
MOESSBAUER EFFECT
OXIDATION
PLASMA
POWDERS
TEMPERATURE RANGE 0273-0400 K
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION