Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1623133 | Journal of Alloys and Compounds | 2008 | 5 Pages |
Abstract
Nano-crystalline copper was synthesized by mechano-chemical reduction of Cu2O with carbon. Influence of stearic acid addition as a process control agent (PCA) on characteristics of synthesized and consolidated copper samples was investigated. The structural evolution and morphology of powders were evaluated using XRD and SEM, respectively. It was found that the nano-crystalline Cu formed after 35Â h of milling and addition of stearic acid prolonged the process. On the other hand, the use of stearic acid in final stages of the process prevented excessive cold welding of ultra fine Cu particles during milling. In fact, it successfully inhibited the formation of coarse Cu particles and eventually decreased the crystallite size of the product to 19Â nm. The hardness of sintered Cu sample increased due to the reduction of mean crystallite size.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
S. Sheibani, A. Ataie, S. Heshmati-Manesh,