Fabrication of Sintered Functionally Gradient Material by Powder Spray Forming Process

Akira Kawasaki, Hiroyuki Hirose, Hiyoshi Hashimoto, Ryuzo Watanabe

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

A powder spray stacking apparatus has been developed for fine stacking of mixed powders. Functionally gradient material has been successfully fabricated using this process, which has fine microstructural transition from stainless steel to zirconia ceramics. Mixing ratio of metal and ceramic powders in the suspension using ethanol as a solvent was varied gradually by the computer control. Deposited products, which were prepared by spraying and depositing the suspension on preheated substrates, were CIP'ed, encapsulated and HIP'ed. Detailed observation of the microstructure has revealed that this process could precisely control the various composition profile with the minimum control size of 0.01mm. It has been shown that the thermal shock resistance of spray formed FGM was significantly higher than that of monolithic zirconia ceramics.

Original languageEnglish
Pages (from-to)922-928
Number of pages7
Journaljournal of the japan society of powder and powder metallurgy
Volume37
Issue number7
DOIs
Publication statusPublished - 1990

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

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