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Vacuum Carburization of Nanometer Tungsten Powder with Carbon Black

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Abstract:

Vacuum carburization of nanometer tungsten powder was investigated in a simple designed apparatus. An X-Y recorder was used to plot differential thermal analysis (DTA) curves to determine the starting temperature of carburization of four samples with different specific surface area. The product was characterized by X-ray Diffraction (XRD) and small angle X-ray scattering (SAXS). The results show that finer tungsten powder has lower starting temperature of carburization. Tungsten powder, the BET surface area of which is 32.97m2/g, was completely carburized to tungsten carbide at 1050°C, even though the starting temperature was 890°C. The particle was found to grow sharply before carburization.

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Periodical:

Materials Science Forum (Volumes 534-536)

Pages:

165-168

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.534-536.165

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Online since:

January 2007

Authors:

Luo Ji, Lin Tao, Zhi Meng Guo, Cheng Chang Jia

Keywords:

Carburization, Nanometer Powders, Tungsten Carbide

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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