The Effect of Boron on the Hardness and Fracture Toughness of WC-FeAl-B and WC-Ni3Al-B Composites


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The hardness and indentation fracture toughness of sub micron WC composites based on aluminide and cobalt binders were investigated. Doped Fe60Al40 and Ni3Al alloys with boron levels ranging from 0 to 0.1 wt%, were used as the aluminide binders. The composite materials were processed by uniaxial hot pressing of milled powder samples at 1500 °C under argon atmosphere. The hardness of WC-40vol%(FeAl-B) was found to be higher than that of WC-40vol%(Ni3Al-B), and it approached to the hardness level of the commercial grade of WC-10wt%Co (H10F). The fracture toughness of both WC-40vol%(FeAl-B) and WC-40vol%(Ni3Al-B) cermets was higher than that of WC-40vol%Co and the toughness increased with increasing boron content. It is believed that boron addition to the aluminide binders leads to improvement in the fracture toughness of the intermetallic matrix composites as a result of increase in the ductility and toughness of the aluminides and also due to increase in WC solubility in the aluminide binders in presence of boron.



Materials Science Forum (Volumes 539-543)

Main Theme:

Edited by:

T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran




M. Ahmadian et al., "The Effect of Boron on the Hardness and Fracture Toughness of WC-FeAl-B and WC-Ni3Al-B Composites", Materials Science Forum, Vols. 539-543, pp. 962-967, 2007

Online since:

March 2007




[2] J. Scussel Henry: ASM Handbook, Materials Characterisation. (ASM, 1990), p.795.

[3] T.N. Tiegs, K.B. Alexander, K.P. Plucknett, P.A. Menchhofer, P.F. Becher and S.B. Waters: Materials Science and Engineering A, (1996), 209(1-2): p.243.

DOI: 10.1016/0921-5093(95)10128-4

[4] K.P. Plucknett, T.N. Tiegs, P.F. Becher, S.B. Waters and P.A. Menchhofer: Ceramic Engineering & Science Proceedings, (1996), 17(3): p.314.

[5] K.P. Plucknet, P.F. Becher and K.B. Alexander: Journal of Microscopy, (1997), 185: p.206.

[6] G.E. Spriggs: International Journal of Refractory Metals and Hard Materials, (1995), 13(5): p.241.

[7] G.Q. Shao, X.L. Duan, J.R. Xie, X.H. Yu, W.F. Zhang and R.Z. Yuan: Reviews on Advanced Materials Science, (2003), 5(4 December), p.281.

[8] R. Subramanian and J.H. Schneibel: Materials Science and Engineering A, (1998), 244(1): p.103.

[9] A. Mosbah, D. Wexler and A. Calka: Materials Science Forum, (2001), 360-362: p.649.

[10] T.N. Tiegs, P.A. Menchhofer, K.P. Plucknett, K.B. Alexander, P.F. Becher and S.B. Waters: P/M in Aerospace Defense and Demanding Applications Proceedings of the International Conference on Powder Metallurgy in Aerospace, Defense and Demanding Applications (Metal Powder Industries Federation, Princeton, NJ, USA 1995), p.211.

[11] V.K. Sikka: Properties, processing and applications of iron aluminides, M.A. Crimp, J. H. Schneibel Editors (TMS 1994), p.3.

[12] Y.F. Han, S.H. Li and M.C. Chaturvedi: Effect of boron additions on microstructure and mechanical properties of a DS gamma prime -Ni3Al base alloy. Proc First Int Symp Struct Intermet (TMS, Warrendale, PA, USA 1993), p.453.

[13] M. Inoue, H. Nagao, K. Suganuma and K. Niihara: Materials Science and Engineering A, (1998), 258(1-2): p.298.

[14] M. Ahmadian, D. Wexler, A. Calka and T. Chandra: Materials Science and Forum, (2003), 426-432: p. (1951).

[15] M. Ahmadian, D. Wexler, T. Chandra and A. Calka: International Journal of Refractory Metals and Hard Materials, (2005), 23(3): p.1559.

[16] G.R. Anstis, B.R. Lawn and D. B. Marshall: Journal of American Ceramic Society, (1981), 64(9): p.533.

[17] K.S. Ravichandran: Acta Metallurgica et Materialia, (1994), 42(4): p.1113.

[18] R.M. German, Liquid phase sintering (Plenum Press, New York, USA 1985).

[19] M. Ahmadian, Sintering, Microstructure and Properties of WC-FeAl-B and WC-Ni3Al-B Composite Materials, in School of Mechanical, Materails and Mechatronic: (The University of Wollongong, Wollongong, NSW, Aus. 2005). 6. Acknowledgements The Iranian Government for financially supporting M. Ahmadian his PhD studies and the Australian Research Council for funding in support of this research project (ARC-Large Grant No. A00103022) is gratefully acknowledged.

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