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Effect of addition of primary tungsten carbide on the properties of ferrotungsten and carbon black powders during mechanical alloying process

Published online by Cambridge University Press:  14 October 2013

Mansour Razavi
Mansour Razavi*
Affiliation:
Department of Ceramic, Materials and Energy Research Center (MERC), Tehran, Iran
*
a)Address all correspondence to this author. e-mail: [email protected], [email protected]
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Abstract

In this paper, the effect of the addition of tungsten carbide on the behavior of Fe–WC system during the mechanical alloying (MA) process has been investigated. For this purpose, raw materials containing industrial ferrotungsten and carbon black with a bit of tungsten carbide powder were milled in a high energy ball mill, and sampling was done at different times. An XRD instrument was used for estimating the probable transformation of phases and properties in the milled sample. Microstructures of specimens were studied using electron microscopy. Results showed that MA even at high milling time could not transform raw materials to other materials in a system containing ferrotungsten and carbon black. In samples with primary tungsten carbide, this was synthesized gradually at a milling time of more than 75 h, and finally, the Fe–WC composite was produced as the final product. Crystalline sizes of the synthesized carbide were in nanometer order that was confirmed by transmission electron microscopy images.

Keywords

compositenanostructuremechanical alloying
Type
Articles
Information
Journal of Materials Research , Volume 28 , Issue 21 , 14 November 2013 , pp. 2996 - 3002
Copyright
Copyright © Materials Research Society 2013 

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