title: Mechanical alloying of powder materials by ultrasonic milling.
abstract: An ultrasonic grinding mill was designed. It permits to carry out simultaneously intensive ultrasonic, mechanical and cavitation treatments of powder materials that in turn leads to sharp acceleration of diffusion, mass-transfer processes and solid phase reactions due to crystallite size and structure changing. It was shown that meta-stable non-equilibrium solid solution (Cu+Ni+Fe, Fe+C), and crystalline structure transformed (Fe(4)N: fcc-hcp transformation) powders could be obtained for the much shorter time in compare with traditional mechanical alloying in planetary ball mill.
authors.affiliation: Kurdyumov Institute for Metal Physics, National Academy of Sciences of Ukraine, 36 Academician Vernadsky blvd., 03142 Kyiv, Ukraine. mordyuk@imp.kiev.ua
authors.forename: B N
authors.initials: BN
authors.lastname: Mordyuk
authors.forename: G I
authors.initials: GI
authors.lastname: Prokopenko