Abstract
A mixture of copper and carbon powders was mechanically alloyed in a planetary ball mill. The supersaturated solid solubility of carbon in mechanically-alloyed copper is 25 at% C, as determined from the lattice parameter change. The supersaturated powder consolidated by static compression at 1.4 GPa, has the relative density of 95%, a Vickers hardness of 121, and a compressive strength of 1.4GPa. In contrast, powder consolidated dynamically by a 90.1 g projectile traveling at a velocity of 38.1 m/s and at an estimated impact compression of 2.3 GPa after 0.4 GPa static precompression has a relative density of 96.3% and a Vickers hardness of 200. X-ray diffraction patterns shift to higher angles after impact compression. The supersaturated solid solubility of 18 at% C in Cu + 20 at% C mechanically-alloyed powders was reduced to 12.5 at% C by impact compression. Mechanically-alloyed powders can be consolidated by impact and static pressures while retaining the effects of mechanical alloying; for example, supersaturated solid solubility.
Original language | English |
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Pages (from-to) | 223-231 |
Number of pages | 9 |
Journal | Radiation Effects and Defects in Solids |
Volume | 157 |
Issue number | 1-2 |
DOIs | |
Publication status | Published - 2002 |
Keywords
- Consolidation
- Dynamic compression
- Impact compression
- Mechanical alloying
- Static compression
- Supersaturated solid solubility
ASJC Scopus subject areas
- Radiation
- Nuclear and High Energy Physics
- Materials Science(all)
- Condensed Matter Physics