EFFECT OF CARBON NANOTUBES ON THE MICROSTRUCTURE AND MECHANICAL PROPERTIES OF W
TAN Jun, ZHOU Zhangjian, LIU Yaqin, QU Dandan, ZHONG Ming, GE Changchun
School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083
Cite this article:
TAN Jun ZHOU Zhangjian LIU Yaqin QU Dandan ZHONG Ming GE Changchun. EFFECT OF CARBON NANOTUBES ON THE MICROSTRUCTURE AND MECHANICAL PROPERTIES OF W. Acta Metall Sin, 2011, 47(12): 1555-1560.
Abstract W–based composites were fabricated by spark plasma sintering (SPS) usingWpowders and carbon nanotubes (CNTs) as raw materials. The effect of the CNTs on the microstructure and room temperature mechanical properties of W was investigated. The results show that the W2C was formed through the reaction of CNTs and W during the SPS process. The formation of the W2C activated the sintering of W and enhanced the densification of W. On the other hand, the in situ formation of W2C decreased the driving force of sintering and consequently inhibited the grain growth of W at high temperature. The grain size, relative density, bending strength and the Vicker’s hardness of W composites were 4 μm, 99%, 1353.9 MPa and 488.4 HV respectively when the content of CNTs was 0.5%.
[1] Lassner E, Schubert W D. Tungsten–Properties, Chemistry, Technology of the Element, Alloys and Chemical Compounds. New York: Kluwer–Academic/Plenum Publishers,
1998: 7
[2] Smid I, Akiba M, Vieider G, Plochl L. J Nucl Mater, 1998; 258–263: 160
[3] Ryu H J, Hong S H. Mater Sci Eng, 2003; A363: 179
[4] Zhang H, Chen X F, Yang Z M, Ding B J. Mater Lett, 1999; 38: 401
[5] Kim Y, Lee K H, Kim E P, Cheong D I, Hong S H. Int J Refract Met Hard Mater, 2009; 27: 842
[6] Rieth M, Daerner B. J Nucl Mater, 2005; 342: 20
[7] Veleva L, Oksiuta Z, Vogtb U, Baluc N. Fus Eng Des, 2009; 84: 1920
[8] Kurishita H, Amano Y, Kobayashi S, Nakai K, Arakawa H, Hiraoka Y, Tajida T, Takebe K, Matsui H. J Nucl Mater, 2007; 367–370: 1453
[9] Kurishita H, Matsuo S, Arakawa H, Narui M, Yamazaki M, Sakamoto T, Kobayashi S, Nakai K, Takida T, Takebe K, Kawai M, Yoshida N. J Nucl Mater, 2009; 386–388: 579
[10] Zhang T Q, Wang Y J, Zhou Y, Lei T Q Song G M. Int J Refract Met Hard Mater, 2007; 25: 445
[11] Rea K E, Viswanathan V, Kruize A , Hosson J Th M De, O’Dell S, Mckechnie T, Rajagopalan S, Vaidyanathan R, Seal S. Mater Sci Eng, 2008; A477: 350
