Importance of local heating in the compaction of thermally sensitive solids

Deevi, SC (1988) Importance of local heating in the compaction of thermally sensitive solids. In: Journal of Physics and Chemistry of Solids, 49 (3). 323 -325.

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Abstract

Local heating is an important parameter in compaction of thermally sensitive solids since local hot spots could conceivably raise the temperature of the system by several hundred degrees. To understand the importance of local hot spots, 20 g of ammonium perchlorate (AP) and potassium perchlorate (KP) were pressed together at 1500 kg cm−2 for 5 min. The surface structural examination of the compact revealed a secondary phase at the interfaces between the grains in the compositions ranging from 50% AP-50% KP to 10% AP-90% KP. The observation of the secondary phase only at the interfaces has been attributed to the short life times of temperature pulses present during the compaction. An interesting aspect of the investigation is the formation of a series of solid solutions of AP-KP.

Item Type:	Editorials/Short Communications
Publication:	Journal of Physics and Chemistry of Solids
Publisher:	Elsevier science
Additional Information:	Copyright of this article belongs to Elsevier science.
Keywords:	Ammonium perchlorate;potassium perchlorate;compaction;local heating; hot spots;temperature pulses;solid solutions;solid state reactions.
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	21 Sep 2010 09:46
Last Modified:	21 Sep 2010 09:46
URI:	http://eprints.iisc.ac.in/id/eprint/32293

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