International Journal of Refractory Metals and Hard Materials, ( ISI ), Volume (36), No (1), Year (2013-1) , Pages (116-121)

Title : ( Conversion of W2C to WC phase during mechano-chemical synthesis of nano-size WC–Al2O3 powder using WO3–2Al–(1+x)C mixtures )

Authors: M. Sakaki , M.Sh. Bafghi , Jalil Vahdati Khaki , Q. Zhang , F. Saito ,

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Abstract

Due to the weak properties of W2C phase, its formation during the process of WC synthesis should be prevented. The aim of the present study has been the mechano-chemical synthesis of aWC–Al2O3 composite powder free from undesirable W2C phase through the addition of excess carbon to the WO3–2Al–C initial mixture. Based on the thermodynamic calculations and results of the supplementary experiments in W–yC and W2C–C systems, the possibility of the conversion of W2C to WC phase through the addition of excess carbon has been investigated. It has been shown that production of a WC–Al2O3 composite powder by 360 min mechano-chemical treatment of an initial mixture of WO3–2Al–1.8C is possible. TEM observations and Williamson–Hall calculation revealed that the obtained WC–Al2O3 powder contains macro-size agglomerates in which each agglomerate consists of nano-size phases

Keywords

, Mechano-chemical processing, Tungsten carbide, Nano materials
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@article{paperid:1029531,
author = {M. Sakaki and M.Sh. Bafghi and Vahdati Khaki, Jalil and Q. Zhang and F. Saito},
title = {Conversion of W2C to WC phase during mechano-chemical synthesis of nano-size WC–Al2O3 powder using WO3–2Al–(1+x)C mixtures},
journal = {International Journal of Refractory Metals and Hard Materials},
year = {2013},
volume = {36},
number = {1},
month = {January},
issn = {0263-4368},
pages = {116--121},
numpages = {5},
keywords = {Mechano-chemical processing; Tungsten carbide; Nano materials},
}

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%0 Journal Article
%T Conversion of W2C to WC phase during mechano-chemical synthesis of nano-size WC–Al2O3 powder using WO3–2Al–(1+x)C mixtures
%A M. Sakaki
%A M.Sh. Bafghi
%A Vahdati Khaki, Jalil
%A Q. Zhang
%A F. Saito
%J International Journal of Refractory Metals and Hard Materials
%@ 0263-4368
%D 2013

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