Hot powder vehicle compaction of an atomized stainless steel powder

Masafumi Miyajima, Akira Kawasaki, Ryuzo Watanabe

Research output: Contribution to journalArticlepeer-review

Abstract

Densification and microstructural development of stainless steel powder compacts during hot powder vehicle compaction was investigated. The preheated powder preform, vacuum encapsuled in a borosilicate glass, was compacted in a steel die using preheated alumina granules as a pressure transmitting medium. The condition for the full-densification was determined as a function of pressure and temperature. Three microstructural features were observed during the compacting process; solutioning of dendritic structure, recrystallization and normal grain growth, which in turn was found to be mainly dependent on preheating temperature. It has been found that a submicron-sized micro-structure is formed during the recrystallization stage. The densification mechanism of the present compaction process has been discussed on the basis of a concept of pressure sintering map.

Original languageEnglish
Pages (from-to)799-804
Number of pages6
JournalNippon Kinzoku Gakkai-si
Volume53
Issue number8
DOIs
Publication statusPublished - 1989

ASJC Scopus subject areas

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

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