Nano-bubble dispersion in copper investigated by means of SAXS and SANS

Shi, S.*; Ono, Naoko*; Ukai, Shigeharu*; Ishida, Tomonori*; Onuma, Masato*; Abe, Yosuke  

In nano-sized bubble dispersion strengthened copper (BDS-Cu) synthesized by using dissociated gases of poly-methyl methacrylate (PMMA) during spark plasma sintering, the size of nano-bubbles and chemical composition of materials inside nano-bubbles were investigated by means of small-angle X-ray scattering (SAXS), small-angle neutron scattering (SANS), and transmission electron microscope (TEM). From the neutron scattering intensity difference between BDS-Cu and pure copper, the average radius of nano-bubbles was about 2 nm, which is well agreed with TEM observation. The intensity ratio of X-ray scattering to neutron scattering caused by nano-bubbles suggested the existence of MMA containing hydrogen inside nano-bubbles.