Journal of The Japan Society of Microgravity Application
Print ISSN : 0915-3616
Combustion Synthesis under Microgravity Environments
Osamu ODAWARA
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JOURNAL OPEN ACCESS

1994 Volume 11 Issue 2 Pages 51-

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Abstract
Combustion synthesis technology can be advantageously applied to high temperature experiments under microgravity environments (MGE) not only as a direct synthesizing method but also as a chemical oven, because it is possible to get high temperatures more rapidly compared to convention­ al electric furnaces through its self-propagating reaction without any external energy. Combustion synthesis consists of the processes of reaction propagation and product crystallization. Since the former proceeds rapidly , a MGE for about 10 seconds should be long enough for attaining the syn­thesizing process. Under such a MGE, the combustion products should be expected to keep the posi­tion where they react because any fluctuation caused by heat convection and mass disturbance would not occur, resulting in finely dispersed combustion products. In this paper , the potential and characteristics of combustion synthesis under MGEs is briefly ex­plained by taking the formation of T iB2- AI- B and Zr02-Al203-Fe composite systems carried out in a free fall (~10 s) and a parabolic flight (~20 s) as an example.
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© 1994 The Japan Society of Microgravity Application
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