Preparation and Sintering of Nano-Sized W-Ni-Fe Powder by Sol-Spray-Drying Process


Article Preview

In this paper, less than 50nm nano-sized W-Ni-Fe composite powder was prepared by Sol-Spray-Drying Process. The preparing processes such as sol formation condition, reduction process of the procusor were studied in detail. The powder characteristics and sintering behavior of the powders were also studied. The powder is nearly spherical and it has good sinterability. In comparison with traditional micron mixed powder consisting of same composition, the melting temperature of the second phase lowered about 70°C, and the sintering temperature for nearly full densification was about 1390°C, which lowered more than 100°C.The effects of rare earth on sintering of the alloy were discussed.



Materials Science Forum (Volumes 534-536)

Edited by:

Duk Yong Yoon, Suk-Joong L. Kang, Kwang Yong Eun and Yong-Seog Kim




J. L. Fan et al., "Preparation and Sintering of Nano-Sized W-Ni-Fe Powder by Sol-Spray-Drying Process", Materials Science Forum, Vols. 534-536, pp. 1409-1412, 2007

Online since:

January 2007




[1] Z. G. Wei, J L Yu, J R Li, et al: International Journal of Impact Engineering Vol. 26 (2001), p.843~852.

[2] S Park, D K Kim, S Lee, et al: Metall. and Mater. Trans. A Vol. 32A(8) (2001), p.2011~(2020).

[3] S H Hong, H J Ryu, W H Baek: Mater Science and Engineering A Vol. 333 (2002), p.187~192.

[4] R M German: Advances in Powder Metall, 1989, 1, 401-413.

[5] H J Ryu, S H Hong and W H Baek: Materials Science and Engineering A Vol. 291 (2000), p.91~96.

[6] J L Fan, B Y Huang: Journal of Advanced Materials Vol. 36(4) (2004), p.48~52 (a) without Y2O3 (b) with adding 0. 4% Y2O3 Fig. 8 Fracture of the alloy from the as-spray dried powder sintered at 1390℃for 120min.