Vacuum Carburization of Nanometer Tungsten Powder with Carbon Black

Abstract:

Article Preview

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.

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:

165-168

DOI:

10.4028/www.scientific.net/MSF.534-536.165

Citation:

L. Ji et al., "Vacuum Carburization of Nanometer Tungsten Powder with Carbon Black", Materials Science Forum, Vols. 534-536, pp. 165-168, 2007

Online since:

January 2007

Export:

Price:

$38.00

[1] Yao Zhengui: Metal Powder Report. vol. 53(1998), p.26.

[2] Liu Yongfu, Cheng yue: Materials Science and Engineering of Powder Metallargy. Vol. 2 (1997), p.76.

[3] Zhang Liying, Wu Chengyi, China Patent CN97122085. 9. (1999).

[4] Zhang Liying, Wu Chengyi and Wang Zhiyong: Acta Metallurgica Sinica, vol. 35(1999), p.152.

[5] Lu Guangfeng, Hao Junjie and Guo Zhimeng: Journal of University of Science and Technology Beijing. vol. 12(2005), p.360.

[6] Zhang Liying, Wu Chengyi and Luo Ji, China Patent CN200410009695. 6. (2004).

[7] Li Jigang, Wu Xijun and Tan Hongbo: Rare Metal Materials and Engineering. Vol. 33(2004), pp.736-140 Particle size (nm) Temperature (℃ ).

In order to see related information, you need to Login.