caa a22 4500 463225309 CHVBK 20180405153225.0 cr unu---uuuuu 170326e20070601xx s 000 0 eng 10.1007/s10853-006-1489-2 doi (NATIONALLICENCE)springer-10.1007/s10853-006-1489-2 Microstructure characterization of in situ synthesized porous Si3N4-Si2N2O composites using feldspar additive [Elektronische Daten] [Rajat Paul, Chi-Woo Lee, Hai-Doo Kim, Byong-Taek Lee] Porous Si3N4-Si2N2O bodies fabricated by multi-pass extrusion process were investigated depending on the feldspar addition content (4-8wt%Si) in the raw silicon powder. The diameter of the continuous pores was about 250μm. The polycrystalline Si2N2O fibers observed in the continuous pores as well as in the matrix regions of the nitrided bodies can increase the filtration efficiency. In the 4wt% feldspar addition, the diameter of the Si2N2O fibers in the continuous pores of the nitrided bodies was about 90-150nm. A few number of rope typed Si2N2O fibers (∼4μm) was found in the case of 8wt% feldspar addition. However, in the 8wt% feldspar addition, the matrix showed highly porous structure composed of large number of the Si2N2O fibers (∼60nm). The relative densities of the Si3N4-Si2N2O bodies with 4wt% and 8wt% feldspar additions were about 65% and 61%, respectively. Springer Science+Business Media, LLC, 2007 Paul Rajat School of Advanced Materials Engineering, Kongju National University, 182, Shinkwan-dong, 314-701, Kongju City, Chungnam, South Korea aut Lee Chi-Woo School of Advanced Materials Engineering, Kongju National University, 182, Shinkwan-dong, 314-701, Kongju City, Chungnam, South Korea aut Kim Hai-Doo Ceramic Materials Group, Korea Institute of Machinery and Materials, 641-010, Changwon, Kyungnam, South Korea aut Lee Byong-Taek Department of Biomedical Engineering and Materials, School of Medicine, Soonchunhyang University, 366-1, Ssangyoung-dong, 330-090, Cheonan-city, Chungnam, South Korea aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/12(2007-06-01), 4701-4706 0022-2461 42:12<4701 2007 42 10853 https://doi.org/10.1007/s10853-006-1489-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-1489-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Paul Rajat School of Advanced Materials Engineering, Kongju National University, 182, Shinkwan-dong, 314-701, Kongju City, Chungnam, South Korea aut NATIONALLICENCE 700 1- Lee Chi-Woo School of Advanced Materials Engineering, Kongju National University, 182, Shinkwan-dong, 314-701, Kongju City, Chungnam, South Korea aut NATIONALLICENCE 700 1- Kim Hai-Doo Ceramic Materials Group, Korea Institute of Machinery and Materials, 641-010, Changwon, Kyungnam, South Korea aut NATIONALLICENCE 700 1- Lee Byong-Taek Department of Biomedical Engineering and Materials, School of Medicine, Soonchunhyang University, 366-1, Ssangyoung-dong, 330-090, Cheonan-city, Chungnam, South Korea aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/12(2007-06-01), 4701-4706 0022-2461 42:12<4701 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer