Effects of metal powder characteristics on the compactibility and sinterability in micro metal injection molding process

Toshiko Osada, Kazuaki Nishiyabu, Satoru Matsuzaki, Shigeo Tanaka, Hideshi Miura

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Metal injection molding for tiny parts is called micro metal injection molding, " μ-MIM" which is considered to be one of promising process to manufacture the micro parts for various applications. In μ-MIM, the feedstock properties, particularly particle size and shape of metal powder are significantly important for the quality of micro parts. The purpose of this study is to investigate the effect of metal powder characteristics on the compactibility and sinterability. The three types of powders (3 μm and 9 μm water-atomized powders and 3 μm gas atomized powder) were used for the comparison. The melt viscosity of the feedstock was utilized as an index for evaluation of compactibility by injection moding. Then the spring shape of green compact specimen was produced by the micro injection molding machine. The green density was also evaluated for compactibility of the feedstock. The density and grain size of sintered specimens were investigated by changing sintering temperature and time.

Original languageEnglish
Pages (from-to)148-153
Number of pages6
JournalNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume72
Issue number1
Publication statusPublished - Jan 1 2006

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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