Impact and static consolidation of mechanically-alloyed mixture of copper and graphite powders

T. Yamane, H. Okubo, N. Oki, K. Hisayuki, M. Konishi, Y. Minamino, Yuichiro Koizumi, M. Kiritani, M. Komatsu, S. J. Kim

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

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 languageEnglish
Pages (from-to)223-231
Number of pages9
JournalRadiation Effects and Defects in Solids
Volume157
Issue number1-2
DOIs
Publication statusPublished - 2002 Dec 1

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

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