Paper Title:
Densification Behavior in Spark-Plasma-Sintering of MgAl2O4 Spinel
  Abstract

The densification mechanism in park-plasma-sintering (SPS) processing was examined in MgAl2O4 spinel. As the relative density ρt increases, that is, as the effective stress σeff decreases, stress exponent n evaluated from effective stress-densification rate relationship continuously varies from n  4 to n  1. TEM observation shows that significant stacking faults caused by partial dislocations are frequently observed in the low ρt region. The results suggest that, for spinel, the predominant densification mechanism in SPS processing changes with ρt from plastic flow by a partial dislocation motion in the low ρt region (n  4) to diffusion-related creep in the high ρt region (n  1).

  Info
Periodical
Materials Science Forum (Volumes 654-656)
Main Theme
Edited by
Jian-Feng Nie and Allan Morton
Pages
1986-1989
DOI
10.4028/www.scientific.net/MSF.654-656.1986
Citation
K. Morita, B. N. Kim, H. Yoshida, K. Hiraga, "Densification Behavior in Spark-Plasma-Sintering of MgAl2O4 Spinel", Materials Science Forum, Vols. 654-656, pp. 1986-1989, 2010
Online since
June 2010
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$32.00
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