caa a22 4500 463221524 CHVBK 20180405153213.0 cr unu---uuuuu 170326e20070801xx s 000 0 eng 10.1007/s10853-006-1304-0 doi (NATIONALLICENCE)springer-10.1007/s10853-006-1304-0 The effect of Fe addition on processing and mechanical properties of reaction infiltrated boron carbide-based composites [Elektronische Daten] [I. Mizrahi, A. Raviv, H. Dilman, M. Aizenshtein, M. Dariel, N. Frage] Dense metal-ceramic composites based on boron carbide were fabricated using boron carbide and Fe powders as starting materials. The addition of 3.5-5.5vol% of Fe leads to enhanced sintering due to the formation of a liquid phase at high temperature. Preforms, with about 20vol% porosity were obtained by sintering at 2,050°C even from an initial boron carbide powder with very low sinterability. Successful infiltration of the preforms was carried out under vacuum (10−4torr) at 1,480°C. The infiltrated composite consists of four phases: B12(C, Si, B)3, SiC, FeSi2 and residual Si. The decrease of residual Si is due to formation of the FeSi2 phase and leads to improved mechanical properties of the composites. The hardness value, the Young modulus and the bending strength of the composites fabricated form a powder mixture containing 3.5vol% Fe are 2,400HV, 410GPa and 390MPa, while these values for the composites prepared form iron free B4C powder are 1,900HV, 320GPa and 300MPa, respectively. The specific density of the composite was about 2.75g/cm3. The experimental results regarding the sintering behavior and chemical interaction between B4C and Fe are well accounted for by a thermodynamic analysis of the Fe-B-C system. Springer Science+Business Media, LLC, 2007 Mizrahi I. Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel aut Raviv A. Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel aut Dilman H. Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel aut Aizenshtein M. Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel aut Dariel M. Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel aut Frage N. Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/16(2007-08-01), 6923-6928 0022-2461 42:16<6923 2007 42 10853 https://doi.org/10.1007/s10853-006-1304-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-1304-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mizrahi I. Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel aut NATIONALLICENCE 700 1- Raviv A. Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel aut NATIONALLICENCE 700 1- Dilman H. Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel aut NATIONALLICENCE 700 1- Aizenshtein M. Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel aut NATIONALLICENCE 700 1- Dariel M. Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel aut NATIONALLICENCE 700 1- Frage N. Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/16(2007-08-01), 6923-6928 0022-2461 42:16<6923 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer