SANS evidence for the dispersion of nanoparticles in W–1Y2O3 and W–1La2O3 processed by hot isostatic pressing

The development of dispersion of nanoparticles in the W-1%Y$_2$O$_3$ and W-1%La$_2$O$_3$ (wt%) alloys processed by hot isostatic pressing has been investigated using small angle neutron scattering. The mode values of these centers are found at 10 and 40 nm in W-1%Y$_2$O$_3$, and 15 and 80 nm in W-1%La$_2$O$_3$. 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.