Analysis of delubrication from iron powder compacts based on a direct observation of decomposing lubricant during sintering

Takashi Kawano, Tomoshige Ono, Yukiko Ozaki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Delubrication behavior of iron powder compacts containing zinc stearate (ZnSt) or ethylene- bisstearamide (EBS) was directly observed during sintering. First, small droplets of lubricant melt appeared scattered on the surface. Then, they gradually formed large pools, and finally vaporized. In addition, ZnSt melt more remarkably bubbled before vaporization than EBS melt. After sintering the compact containing ZnSt in nitrogen, spot stains of rough surface and concentrated zinc with the diameter of 1 mm were found on the top of their surface. It is probable that the lubricant melt inhomogeneously flew out through the easier paths in the compacts to the surface accompanied by the exhausting gas of the decomposed lubricants.

Original languageEnglish
Title of host publicationProceedings of the Euro International Powder Metallurgy Congress and Exhibition, Euro PM 2009
PublisherEuropean Powder Metallurgy Association (EPMA)
Volume3
ISBN (Print)9781899072088
Publication statusPublished - 2009
Externally publishedYes
EventEuropean International Powder Metallurgy Congress and Exhibition, Euro PM 2009 - Copenhagen, Denmark
Duration: Oct 12 2009Oct 14 2009

Other

OtherEuropean International Powder Metallurgy Congress and Exhibition, Euro PM 2009
CountryDenmark
CityCopenhagen
Period10/12/0910/14/09

All Science Journal Classification (ASJC) codes

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

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  • Cite this

    Kawano, T., Ono, T., & Ozaki, Y. (2009). Analysis of delubrication from iron powder compacts based on a direct observation of decomposing lubricant during sintering. In Proceedings of the Euro International Powder Metallurgy Congress and Exhibition, Euro PM 2009 (Vol. 3). European Powder Metallurgy Association (EPMA).