Solution combustion synthesis of Ni-Y2O3 nanocomposite powder
(1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. School of Resources and Environmental Engineering, College of Panzhihua, Panzhihua 617000, China;
3. Aerospace Research Institute of Materials & Processing Technology, Beijing 100088, China)
2. School of Resources and Environmental Engineering, College of Panzhihua, Panzhihua 617000, China;
3. Aerospace Research Institute of Materials & Processing Technology, Beijing 100088, China)
Abstract: Ni-Y2O3 nanocomposite powder with uniform distribution of fine oxide particles in the metal matrix was successfully fabricated via solution combustion process followed by hydrogen reduction. The combustion behavior was investigated by DTA-TG analysis. The influence of urea to nickel nitrate (U/Ni) ratio on the combustion behavior and morphology evolution of the combusted powder was investigated. The morphological characteristics and phase transformation of the combusted powder and the reduced powder were characterized by FESEM, TEM and XRD. The HRTEM image of Ni-Y2O3 nanocomposite powder indicated that Y2O3 particles with average particle size of about 10 nm dispersed uniformly in the nickel matrix.
Key words: nanocomposites; nanoparticles; solution combustion synthesis; oxide dispersion strengthening; Ni; Y2O3