The synthesis of micro-sized silicon carbide whiskers and the application for heat transfer enhancement

Document Type

Article

Publication Date

12-11-2014

Abstract

This paper presents a simple and cost-effective method for the production of micro-sized silicon carbide whiskers at high yield and the effect on heat transfer enhancement for the whisker laden fluids. For SiC whisker synthesis, the starting powder mixture is obtained by milling short carbon fibers with the white ashes of rice hulls. Calcination in argon, together with the subsequent purification process, results in a high yield of SiC whiskers, which possess a diameter of 200–400 nm and a length of several tens of microns. The formation of the whiskers is discussed according to VS growth mechanism. Convective heat transfer performance in small channel tubes is then studied for fluid systems mixed with those micro-sized SiC whiskers at different concentrations. The heat transfer coefficient of SiC containing fluid can be significantly improved in comparison to the base fluid.

Publication Source (Journal or Book title)

Science China Technological Sciences

First Page

2371

Last Page

2378

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