Paper Title:
A Study of Reduced and Carburized Reactions in Dry-Milled WO3+Co3O4+C Mixed Powders with Different Carbon Content
  Abstract

The dry-milling technique was used for mixing and crushing oxides and graphite powder to get homogeneous mixed powders. The weight ratio of ball-to-powder was 30:1 and argon gas was filled in jar. The carbon content was more 10~ 20wt% than the stoichiometric amount. The drymilling was carried for 20 hours. After milling, the mixed powders were reduced and carburized at 900~980°C for 3 hours flowing Ar gas in tube furnace. The dry-milled powders showed wide diffraction patterns of X-ray. The reactions of reduction and carburization were completed in 3 hours at 980°C. After the reactions, the mean size of WC particles was about 200 nm. The content of free carbon in WC/Co mixed powders decreased as the reaction temperature increased.

  Info
Periodical
Materials Science Forum (Volumes 534-536)
Edited by
Duk Yong Yoon, Suk-Joong L. Kang, Kwang Yong Eun and Yong-Seog Kim
Pages
1149-1152
DOI
10.4028/www.scientific.net/MSF.534-536.1149
Citation
H. S. Im, J. M. Hur, W. J. Lee, "A Study of Reduced and Carburized Reactions in Dry-Milled WO3+Co3O4+C Mixed Powders with Different Carbon Content", Materials Science Forum, Vols. 534-536, pp. 1149-1152, 2007
Online since
January 2007
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Price
$32.00
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