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A study of self-propagating high-temperature synthesis of NiAl in thermal explosion mode

DSpace at IIT Bombay

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Title A study of self-propagating high-temperature synthesis of NiAl in thermal explosion mode
 
Creator BISWAS, A
ROY, SK
GURUMURTHY, KR
PRABHU, N
BANERJEE, S
 
Subject vacuum applications
combustion
nickel alloys
x-ray diffraction
 
Description Processing of NiAl in the thermal explosion mode of Self-propagating High-temperature Synthesis (SHS) was investigated at different heating rates varying between 5 and 60 °C/min. Three different Ni particle sizes were used and experiments were conducted in vacuum and argon atmospheres to arrive at an optimized processing window. On-line videography of the process provided the visual evidence of the different stages of thermal explosion. Evolution of the process was studied by on-line thermometry, optical and scanning electron microscopy, XRD and mercury intrusion porosimetry. The results showed that the combustion behaviour was independent of the atmosphere but strongly dependent on the rate of heating and hence on the extent of pre-combustion reaction. Process modelling was carried out to describe the effect of the rate of heating both on the pre-combustion reaction and the combustion in the case of thermal explosion. This model could successfully rationalize the experimental results.
 
Publisher Elsevier
 
Date 2009-07-04T07:50:13Z
2011-11-25T15:07:33Z
2011-12-26T13:04:41Z
2011-12-27T05:50:40Z
2009-07-04T07:50:13Z
2011-11-25T15:07:33Z
2011-12-26T13:04:41Z
2011-12-27T05:50:40Z
2002
 
Type Article
 
Identifier Acta Materialia 50(4), 757-773
1359-6454
http://dx.doi.org/10.1016/S1359-6454(01)00387-1
http://hdl.handle.net/10054/1597
http://dspace.library.iitb.ac.in/xmlui/handle/10054/1597
 
Language en