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Ultrahigh-pressure densification of nanocrystalline WB ceramics

  • Ying Chen, Duanwei He, Jiaqian Qin, Zili Kou, Shanmin Wang and Jianghua Wang (a1)...


Phase-pure nanostructured WB ceramics are hot pressed at ultrahigh pressures of 1.0 to 3.0 GPa and high temperatures of 700 to 1000 °C (UHPHT) for 60 min. The UHPHT samples are nanograin size from 15 to 40 nm. Our experimental observation shows that ultrahigh pressure could improve densification, and the density of WB samples could reach 99.4% of theoretical. The comparative experiments carried out at ambient pressure and temperatures of 550 to 1100 °C for 60 min indicate that the external pressure was favorable for phase-pure and highly dense WB formation. In addition, the UHPHT samples give a high hardness value of 28.9 ± 0.8 GPa.


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1.Shein, I.R., Ivanovskii, A.L.Influence of lattice vacancies on the structural, electronic, and cohesive properties of niobium and molybdenum borides from first-principles calculations. Phys. Rev. B 73, 144108 (2006)
2.Matkovich, M.I., Samsonov, G.V., Hagenmuller, P., Lundstrom, T.Boron and Refractory Borides edited by M.I. Matkovich (Springer-Verlag, Berlin 1977)
3.Fahrenholtz, W.G., Hilmas, G.E., Talmy, I.G., Zaykoski, J.A.Refractory diborides of zirconium and hafnium. J. Am. Ceram. Soc. 90, 1347 (2007)
4.Usta, M., Ozbek, I., Ipek, M., Bindal, C., Ucisik, A.H.The characterization of borided pure tungsten. Surf. Coat. Technol. 194, 330 (2005)
5.Johnson, D.L., Harmon, B.N., Liu, S.H.Self-consistent electronic structure of the refractory metal ZrB2, a pseudographite intercalation compound. J. Chem. Phys. 73, 1898 (1980)
6.Ihara, H., Hirabayashi, M., Nakagawa, H.Band structure and x-ray photoelectron spectrum of ZrB2. Phys. Rev. B 16, 726 (1977)
7.Anishchik, V.M., Dorozhkin, N.N.Electronic structure of TiB2 and ZrB2. Phys. Status Solidi B 160, 173 (1990)
8.Yeh, C.L., Chen, W.H.Preparation of niobium borides NbB and NbB2 by self-propagating combustion synthesis. J. Alloys Compd. 420, 111 (2006)
9.Brandstötter, J., Lengauer, W.Multiphase reaction diffusion in transition metal–boron systems. J. Alloys Compd. 262–263, 390 (1997)
10.Khor, K.A., Yu, L.G., Sundararajan, G.Formation of hard tungsten boride layer by spark plasma sintering boriding. Thin Solid Films 478, 232 (2005)
11.Locci, A.M., Licheri, R., Orrù, R., Cao, G.Reactive spark plasma sintering of rhenium diboride. Ceram. Int. 35, 397 (2009)
12.Binder, J., Roth, G.An evaluation of molybdenum borides as cutting tools. Powder Metall. Bull. 5, 154 (1953)
13.Bodrova, L.G., Koval'chenko, M.S., Serebryakova, T.I.Preparation of tungsten tetraboride. Powder Metall. Met. Ceram. 13, 1 (1974)
14.Chen, X.Q., Fu, C.L., Krčmar, M., Painter, G.S.Electronic and structural origin of ultraincompressibility of 5d transition-metal diborides MB2 (M = W, Re, Os). Phys. Rev. Lett. 100, 196403 (2008)
15.Kawanowa, H., Gotoh, Y., Otani, S., Yamamoto, K., Souda, R.Formation of monolayer graphite at the WB2 (0001) surface. Surf. Sci. 454, 49 (2000)
16.Wang, S.M., He, D.W., Zou, Y.T., Wei, J.J., Lei, L., Li, Y.J., Wang, J.H., Wang, W.D., Kou, Z.L.High-pressure and high-temperature sintering of nanostructured bulk NiAl materials. J. Mater. Res. 24, 2089 (2009)
17.Qin, J.Q., He, D.W., Wang, J.H., Fang, L.M., Lei, L., Li, Y.J., Hu, J., Kou, Z.L., Bi, Y.Is rhenium diboride a superhard material? Adv. Mater. 20, 4780 (2008)
18.Sung, C.M.A century of progress in the development of very high pressure apparatus for scientific research and diamond synthesis. High Temp.–High Press. 29, 253 (1997)
19.Itoh, H., Matsudaira, T., Naka, S., Hamamoto, H., Obayashi, M.Formation process of tungsten borides by solid state reaction between tungsten and amorphous boron. J. Mater. Sci. 22, 2811 (1987)
20.Rudy, E.Experimental Phase Equilibria of Selected Binary, Ternary, and Higher Order Systems, Part V, The Phase Diagram W–B–C (Air Force Materials Laboratory 1969)
21.Lei, L., He, D.Synthesis of GaN crystals through solid-state metathesis reaction under high pressure. Cryst. Growth Des. 9, 1264 (2009)
22.He, D.W., Zhao, Q., Wang, W.H., Che, R.Z., Liu, J., Luo, X.J., Wang, W.K.Pressure-induced crystallization in a bulk amorphous Zr-based alloy. J. Non-Cryst. Solids 297, 84 (2002)
23.Okada, S., Kudou, K., Lundström, T.Preparations and some properties of W2B, δ-WB and WB2 crystals from high-temperature metal solutions. Jpn. J. Appl. Phys. 34, 226 (1995)
24.Pierson, H.O.Handbook of Chemical Vapor Deposition (CVD): Principles, Technology, and Applications (Noyes Publications, Westwood, NJ 1992)


Ultrahigh-pressure densification of nanocrystalline WB ceramics

  • Ying Chen, Duanwei He, Jiaqian Qin, Zili Kou, Shanmin Wang and Jianghua Wang (a1)...


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