DocumentCode :
2558386
Title :
Effect of operating parameters on the formation of nickel aluminate spinel through transferred ARC plasma torch
Author :
Suresh, K. ; Rao, K.P. ; Yugeswaran, S. ; Kobayashi, A. ; Selvarajan, V.
Author_Institution :
Dept. of Mech. & Biomed. Eng., City Univ. of Hong Kong, Kowloon, China
fYear :
2012
fDate :
8-13 July 2012
Abstract :
Nickel aluminate (NiAl2O4) spinel was formed using transferred arc plasma (TAP) melting in a single step processing. For the same, commercially available NiO and α-Al2O3 powders were mixed in 1:1 molar weight ratio in a ball mill and then melted in a specially designed transferred arc plasma torch at different operating conditions. Argon gas was used to produce plasma at atmospheric pressure. XRD, SEM and Micro Raman studies were conducted to characterize the processed samples and the results conclude that 10 kW of torch input power level and 5 mins of processing times are appropriate for obtaining the highest percentage NiAl2O4 spinel. The efficiency of spinel formation increases with the melting time up to a certain level of input power and time, thereafter it decreases.
Keywords :
X-ray diffraction; arcs (electric); argon; ball milling; melting; nickel compounds; plasma diagnostics; plasma materials processing; plasma production; plasma torches; scanning electron microscopy; Ar; NiAl2O4; SEM; XRD; argon gas; atmospheric pressure; ball milling; microRaman studies; molar weight ratio; nickel aluminate spinel formation; operating parameter effect; powders; power 10 kW; single step processing; specially designed transferred arc plasma torch; spinel formation efficiency; time 5 min; torch input power level; transferred arc plasma melting; Biomedical engineering; Cities and towns; Educational institutions; Nickel; Physics; Plasmas; Welding;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Plasma Science (ICOPS), 2012 Abstracts IEEE International Conference on
Conference_Location :
Edinburgh
ISSN :
0730-9244
Print_ISBN :
978-1-4577-2127-4
Electronic_ISBN :
0730-9244
Type :
conf
DOI :
10.1109/PLASMA.2012.6383560
Filename :
6383560
Link To Document :
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