Analysis of dewaxing behavior of iron powder compacts based on a direct observation of Decomposing Lubricant During Sintering in a Furnace

Takashi Kawano, Tomoshige Ono, Yukiko Ozaki

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Dewaxing 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, melt of ZnSt more remarkably bubbled than that of EBS during vaporization. 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 believed 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
Pages (from-to)83-88
Number of pages6
JournalJFE Technical Report
Issue number16
Publication statusPublished - Mar 2011
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys

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