Title: R&D on long ceramic-lined pipes produced by a centrifugal-thermit process

Authors: Osamu Odawara

Addresses: Department of Electronic Chemistry, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 227, Japan

Abstract: Long ceramic-lined pipes(>3 m) have been produced by a thermit reaction induced under the effect of a centrifugal force(||Centrifugal-Thermit Process||). The significant feature for the production of long ceramic-lined pipes is mainly in its reaction propagation under centrifugal effect as well as the centrifugal force and reaction heat; the reaction first proceeds rapidly along the inner surface of the reactant and then in the radial direction, resulting in a homogeneous quality in the direction of pipe length. It is very important in improving the quality of the ceramic-lined pipes to find the proper conditions of the reactant and centrifugal force; the former mainly determines the produced ceramic layer quality and the latter the achievement of layer separation and the mechanical properties of the pipes. In the present R&D, the conditions of thermal insulation, centrifugal force, the additives to thermit powders, etc. are optimized in order to bring out the potential of the ceramic-lined pipes produced by the centrifugal-thermit process.

Keywords: ceramics; processing; exothermic reaction; thermal insulation; additives; ceramic-lined pipes; thermit reaction; centrifugal force; reaction heat.

DOI: 10.1504/IJMPT.1993.036533

International Journal of Materials and Product Technology, 1993 Vol.8 No.2/3/4, pp.232 - 234

Published online: 04 Nov 2010 *

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