Paper Title:
Microstructure Control of Porous In-Situ Synthesized Si2N2O-Si3N4 Ceramics
  Abstract

Using 6wt%Y2O3-2wt%Al2O3 as sintering additives and Si as a raw powder, the continuously porous in-situ Si2N2O-Si3N4 bodies were fabricated by multi-pass extrusion process and their microstructures were investigated depending on the addition of carbon (0-9wt %) in the mixture powder. The introduction of Si2N2O fibers observed in the unidirectional continuous pores as well as in the pore-frame regions of the nitrided bodies can be an effective method in increasing the filtration efficiency. In the case of no carbon addition, the network type Si2N2O fibers with high aspect ratio appeared in the continuous pores with diameters of 150-200nm. However, in the case of 9wt% C addition, the fibers were found without any network type and had diameters of 200-250nm.

  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
1049-1052
DOI
10.4028/www.scientific.net/MSF.534-536.1049
Citation
R. K. Paul, C. W. Lee, H. D. Kim, B. T. Lee, "Microstructure Control of Porous In-Situ Synthesized Si2N2O-Si3N4 Ceramics", Materials Science Forum, Vols. 534-536, pp. 1049-1052, 2007
Online since
January 2007
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$32.00
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