Abstract
The formation of the nanostructured WC–10 wt% Co powder from WO3, Co3O4, and graphite is studied. The effects of the processing parameters of high-energy ball milling, reduction in H2 atmosphere, and carburization in Ar/CO atmosphere are investigated. The crystallite size of the as-synthesized WC is 30–40 and 40–50 nm for 900 and 1000 °C carburized powders, respectively. The powder is agglomerated with the size of the primary particles ranging from 50 to 700 nm. High-energy ball milling of WO3–Co3O4–C powder mixtures leads to finer particle and crystallite sizes with larger surface area. Such milled powders can be reduced to nanostructured W at 570 °C and carburized to form WC at temperatures as low as 900 °C. Crystal growth has taken place during carburization, particularly at 1000 °C, which results in the formation of truncated triangular prisms and nanoplates of WC at 1000 °C.
Similar content being viewed by others
References
Gleiter H (1992) Nanostruct Mater 1:1
Fang Z, Wang X, Ryu T, Hwang K, Sohn H (2009) Int J Refract Metals Hard Mater 27:288
Porat R, Berger S, Rosen A (1996) Mater Sci Forum 629:225
Fecht HJ (1992) Nanostruct Mater 1:125
Fecht HJ, Hellstern E, Fu Z, Johnson WL (1990) Metall Mater Trans A 21:2333
Gao L, Kear BH, Seegopaul P (1999) US Patent 5,919,428
Seegopaul P, Gao L (2003) US Patent 6,524,366
Kim BK, Ha GG, Woo Y (2003) US Patent 6,511,551
Lee G, Ha GH, Kim BK (1999) J Korean Inst Metal Mater 37:1233
Zhang ZY, Wahlberg S, Wang MS, Muhammed M (1999) Nanostruct Mater 12:163
Ryu T, Sohn HY, Han G, Kim Y, Hwang KS, Mena M, Fang ZZ (2008) Metall Mater Trans B 39:1
Hojo J, Oku T, Kato A (1978) J Less-Common Metal 59:85
Fitzsimmons M, Sarin VK (1995) Surf Coat Technol 76:250
Kim JC, Kim BK (2004) Scripta Mater 50:969
Ban ZG, Shaw L (2002) J Mater Sci 37:3397. doi:10.1023/A:1016553426227
Ban ZG, Shaw L (2001) Acta Mater 49:2933
Yang ZG, Shaw L (1996) Nanostruct Mater 7:873
Zhong Y, Shaw L, Manjarres M, Zawrah MM (2010) J Am Ceram Soc 93:3159
Klug HP, Aexander LE (1974) X-ray diffraction procedures for polycrystalline and amorphous materials. Wiley, New York
Snyder RL, Fiala J, Bunge HJ (1999) Defect and microstructure analysis by diffraction. Oxford University Press, Oxford
Mittermeijer EJ, Scardi P (2004) Diffraction analysis of the microstructure of materials. Springer-Verlag, Berlin
Ungar T (2004) Scripta Mater 51:777
Liu W, Song X, Zhang J, Zhang G, Liu X (2008) Mater Chem Phys 109:235
Aronsson B, Pastor H (1991) Powder metallurgy: an overview. The Institute of Metals, London
Binnewies M, Milke E (2002) Thermochemical data of elements and compounds, 2nd edn. Wiley-VCH, Weinheim
Yih S, Wang C (1979) Tungsten: source metallurgy properties and applications. Plenum Press, New York, p 385
Gu D, Shen Y (2006) Mater Lett 60:3664
de Villiers HL (1998) J Therm Spray Technol 7:357
Sahraoui T, Guessasma S, Ali Jeridane M, Hadji M (2010) Mater Design 31:1431
Exner HE (1979) Int Mater Rev 24:149
French DN, Thomas DA (1968) In: Vahldiek FV, Mersol J (eds) Anisotropy in single-crystal refractory compounds, vol 1. Plenum Press, New York
Takahashi T, Freise EJ (1965) Philos Mag 12:1
Acknowledgements
This research was sponsored by the U.S. National Science Foundation (NSF) under the contract number CMMI-0856122. The support and vision of Dr. Mary Toney is greatly appreciated.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Zhong, Y., Shaw, L. A study on the synthesis of nanostructured WC–10 wt% Co particles from WO3, Co3O4, and graphite. J Mater Sci 46, 6323–6331 (2011). https://doi.org/10.1007/s10853-010-4937-y
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10853-010-4937-y