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    Mateus, R. Dias, M. Lopes, J. Rocha, J. Catarino, N. Duarte, P. Gomes, R.B. Silva, C. Fernandes, H. Livramento, V. Carvalho, P.A. Alves, E. Hanada, K. and Correia, J.B. 2013. Blistering of W–Ta composites at different irradiation energies. Journal of Nuclear Materials, Vol. 438, p. S1032.

    Mateus, R. Dias, M. Lopes, J. Rocha, J. Catarino, N. Franco, N. Livramento, V. Carvalho, P.A. Correia, J.B. Hanada, K. and Alves, E. 2013. Effects of helium and deuterium irradiation on SPS sintered W–Ta composites at different temperatures. Journal of Nuclear Materials, Vol. 442, Issue. 1-3, p. S251.


Synthesis of high-strength W–Ta ultrafine-grain composites

  • R.T. Ott (a1), X.Y. Yang (a1), D.E. Guyer (a1), S. Chauhan (a2) and D.J. Sordelet (a1)
  • DOI:
  • Published online: 01 January 2011

Bulk samples of an ultrafine-grained tungsten–tantalum composite alloy have been synthesized by consolidating mechanically milled composite powders. The grain growth during densification is limited due to the submicron-scale layering of the individual metals in the composite particles and the relatively low sintering temperature (1300 °C). The ultrafine microstructure of the high-density (∼99% theoretical density) samples leads to a high yield stress of ∼3 GPa under quasi-static uniaxial compression. A tendency for Ta-rich solid-solution formation during densification was observed, and the high-temperature phase equilibria in the composite powders were examined further using high-energy x-ray diffraction at temperatures up to 1300 °C.

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Journal of Materials Research
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