Publication: SANS evidence for the dispersion of nanoparticles in W-1Y₂O₃ and W-1La₂O₃ processed by hot isostatic pressing
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2012-07
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Elsevier
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Abstract
The development of a dispersion of nanoparticles in the W–1%Y₂O₃ and W–1%La₂O₃ (wt%) alloys processed by hot isostatic pressing have been investigated using small-angle neutron scattering. The analyses of the scattering data using the Beaucage unified approach reveal the presence of a bi-modal distribution of spherical scattering centers with sizes of less of 180 nm in these alloys. The mode values of these centers are found at ~ 10 and 40 nm in W–1%Y₂O₃, and at ~ 15 and 80 nm in W–1%La₂O₃ . The scanning electron microscopy analyses showed the presence of small second phase particles. The contribution of the pore space to the scattering curves has been analyzed using the results obtained for pure W processed following the same procedure used for the alloys, and the porosity measurements of the samples.
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ODS tungsten alloys, Refractory metals, SANS, HIP
Bibliographic citation
International Journal of Refractory Metals and Hard Materials 33 (2012), pp. 6–9