Non-uniform shrinkage of guide-type MIM compact during sintering

S. Takizawa, R. Watanabe, A. Kawasaki

研究成果: Article査読

2 被引用数 (Scopus)

抄録

In-situ measurement of non-uniform sintering shrinkage of guide-type (ring-on-plate) MIM compacts was made by digital image correlation method. The shrinkage distribution and the distortion in the compacts were determined with a dimensional accuracy of 3μm. A periodical shrinkage distribution in the ring portion was observed in the compact during sintering, due to density distribution generated presumably by an uneven injection flow from gates located at the both ends of the base plate. An upward warpage of the base plate and a collapse of the ring portion were also observed. The inhomogeneous radial shrinkage, the base-plate warpage and the ring-collapse were interpreted in terms of the ring-portion density distribution and the effect of gravity. The periodical variation in the radius distribution during sintering was attributed to the green density distribution. A simple geometrical consideration showed that the distortion due to gravity was estimated to be approximately 2% at the most.

本文言語English
ページ(範囲)445-450
ページ数6
ジャーナルFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
48
5
DOI
出版ステータスPublished - 2001 5

ASJC Scopus subject areas

  • 機械工学
  • 産業および生産工学
  • 金属および合金
  • 材料化学

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