Fabrication of porous Co-Cr-Mo compacts prepared by spark plasma sintering for biomedical applications

Naoyuki Nomura, Masako Utsuhashi, Mariko Abe, Tsukasa Ono, Akihiko Chiba

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Porous Co-29Cr-6Mo (ASTM F75) compacts were fabricated by spark plasma sintering method (SPS) with plasma rotating electrode processed (PREPed) Co-29Mo-6Mo (mass%) powder with a diameter range (610-700 μm). The porosity of the compacts could be changed between 10.8% and 39.4% when the SPS temperature varies from 1023 K to 1273 K. Relatively large neck was formed by post annealing at 1473 K for 7.2 ks for the compacts containing the porosity of 32.4%, although the porosity change was only 0.6%, This annealing improves the bending strength of the compact. Young's modulus of the annealed compact containing the porosity of 31.4% shows 54.0 GPa, which is relatively higher than that of human cortical bone but approximately one-forth as much as that of as-cast Co-Cr-Mo alloy. The compact possesses the bending strength of 223.4 MPa, which is superior to that of human cortical bone.

Original languageEnglish
Pages (from-to)281-286
Number of pages6
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Issue number4
Publication statusPublished - 2006 Apr
Externally publishedYes


  • Bending strength
  • Cobalt-chromium-molybdenum alloy
  • Porous compact
  • Spark plasma sintering
  • Young's modulus

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry


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