| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 237067 | Powder Technology | 2012 | 5 Pages |
Cu/Cr2O3 nano-composites have high potential for structural and electrical applications in which enhanced mechanical characteristics are required. In this research, nano-composite specimens containing different amounts of Cr2O3, with Cr content of 1–3 wt.%, were produced by in-situ oxidation of Cu–Cr alloyed powders during sintering. X-ray diffraction test was carried out to analyze the progress of mechanical alloying and detection of probable Cr2O3 particles formed due to internal oxidation during sintering. The morphology of milled powders was examined using scanning electron microscopy (SEM).Physical and mechanical property results of nano-composite specimens indicate the density, specific electrical resistivity, hardness and wear rate values alternation with amount of Cr2O3 in Cu matrix, which in turn is related to specimen Cr content.
Graphical abstractIn this research, nano-composite specimens containing different amounts of Cr2O3 were produced by in-situ oxidation of Cu–Cr alloyed powders during sintering. XRD was carried out to analyze the progress of mechanical alloying and detection of probable Cr2O3 particles. Physical and mechanical properties of Cu/Cr2O3 nano-composite specimens were evaluated.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Cu/Cr2O3 nanocomposites were produced by mechanical alloying and internal oxidation. ► Electrical resistivity of Cu/Cr2O3 increases as the amount of Cr2O3 increases. ► Wear rate of Cu/Cr2O3 decreases as the Cr2O3 content of it increases. ► At low sliding distance, abrasive wear is as dominant mechanism. ► At higher sliding distances the delamination and oxidation mechanisms activated.
