Paper Title:
True Sedimentation and Particle Packing Rearrangement during Liquid Phase Sintering
  Abstract

When an alloy such as Ni-W is liquid phase sintered, heavy solid W particles sedimentate to the bottom of the container, provided that their volume fraction is less than a critical value. The sintering process evolves typically in two stages, diffusion-driven macrosegregation sedimentation followed by true sedimentation. During sedimentation, the overall solid volume fraction decreases concurrently with elimination of liquid concentration gradient. However, in the second stage of true sedimentation, the average solid volume fraction in the mushy zone increases with time, and oddly, no concentration gradient is necessary in the liquid zone. In this work, we propose that the true sedimentation results from particle rearrangement for higher packing efficiency.

  Info
Periodical
Materials Science Forum (Volumes 534-536)
Edited by
Duk Yong Yoon, Suk-Joong L. Kang, Kwang Yong Eun and Yong-Seog Kim
Pages
609-612
DOI
10.4028/www.scientific.net/MSF.534-536.609
Citation
J. K. Lee, L. Xu, S. Z. Lu, "True Sedimentation and Particle Packing Rearrangement during Liquid Phase Sintering", Materials Science Forum, Vols. 534-536, pp. 609-612, 2007
Online since
January 2007
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Price
$32.00
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