Paper Title:
Spark Plasma Sintering of α-Si3N4 Ceramics with MgO-Al2O3 as Sintering Additives
  Abstract

In the present study, α-Si3N4 is prepared by using MgO and Al2O3 as the sintering additives and spark plasma sintering (SPS) technique. The SPS sintering mechanism is discussed. The relationship between the content of sintering additives, sintering temperature and relative densities of the samples is analyzed. The results suggest that when the sintering temperature is 1300-1500°C, the content of sintering additives is 6wt.%-10wt.%, the relative density of sintered samples is 64%-96%. When the sintering temperature reaches 1400°C, the content of sintering additives is 10%, the samples can be fully dense sintered and the relative density can be up to 95%. The sintering mechanism is liquid phase sintering. The bending strength of the sintered samples is 50-403MPa and has a close correlation with the relative density.

  Info
Periodical
Edited by
Di Zhang, Jingkun Guo and Chi Y. A. Tsao
Pages
176-179
DOI
10.4028/www.scientific.net/KEM.351.176
Citation
F. Q. Yan, F. Chen, Q. Shen, L. M. Zhang, "Spark Plasma Sintering of α-Si3N4 Ceramics with MgO-Al2O3 as Sintering Additives", Key Engineering Materials, Vol. 351, pp. 176-179, 2007
Online since
October 2007
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$32.00
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