Densification Behavior in Spark-Plasma-Sintering of MgAl2O4 Spinel

Abstract:

Article Preview

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 et al., "Densification Behavior in Spark-Plasma-Sintering of MgAl2O4 Spinel", Materials Science Forum, Vols. 654-656, pp. 1986-1989, 2010

Online since:

June 2010

Export:

Price:

$35.00

In order to see related information, you need to Login.

In order to see related information, you need to Login.