Microstructure-permeability relation of porous beta-Si3N4 ceramics

TOPATEŞ G., Mammitzsch L., Petasch U., Adler J., Kara F., MANDAL H.

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, vol.33, no.9, pp.1545-1551, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 33 Issue: 9
  • Publication Date: 2013
  • Doi Number: 10.1016/j.jeurceramsoc.2012.12.022
  • Journal Name: JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1545-1551
  • Keywords: Si3N4, Structural applications, Microstructure, Porosity, Permeability, SILICON-NITRIDE CERAMICS, GRAIN-GROWTH, MECHANICAL-PROPERTIES, FABRICATION, SI3N4, PERFORMANCE, MEMBRANES, POROSITY, DAMAGE, FLOW
  • Anadolu University Affiliated: Yes

Abstract

Porous beta-Si3N4 ceramics with two distinct structures were produced by using two different Si3N4 sources to investigate the relationship between microstructure and permeability. Results showed that regardless of pore amount, size of pore channels, shape-distribution of beta-Si3N4 grains are more effective on permeability of porous Si3N4 ceramics. Higher permeability and lower contribution of inertial forces was obtained by microstructure consists of coarse and equiaxed grains even at lower porosity amount. Calculated Forchheimer number (F-o) and measured the local breadth of a pore also supported the effect of microstructure on permeability. (C) 2013 Elsevier Ltd. All rights reserved.