Nanoparticles have been produced by reactive ball milling. Cu, Co and alloyed Cu- 10 at. % Co particles have been obtained by milling metallic chlorides with pure sodium having NaCl in excess. Sodium chloride is also a product of the reduction reaction and it is used both to protect particles from oxidation and to prevent particle coalescence. A volume fraction of approximately 3 % is obtained in 3 or 8 h of milling. Characterization of the produced nanoparticles is made by electron microscopy, X-ray diffraction and calorimetry. Particles in all cases have sizes around 7 nm. A mixture of Co and Cu chlorides reacting with Na gives rise to alloyed Cu-Co nanoparticles. Such particles have spherical shapes and consist of a non equilibrium solid solution which can be decomposed into Cu and Co by thermal treatment as expected from the corresponding equilibrium phase diagram.
|Original language||American English|
|Number of pages||245|
|State||Published - 23 Aug 2007|
|Event||2007 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2007, Technical Proceedings - |
Duration: 23 Aug 2007 → …
|Conference||2007 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2007, Technical Proceedings|
|Period||23/08/07 → …|
Angeles, J., Velazquez, C., & Calderon, H. A. (2007). Synthesis and characterization of metallic nanoparticles of Cu, Co and Cu-Co by reactive milling. 273-276. Paper presented at 2007 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2007, Technical Proceedings, .