caa a22 4500 606195076 CHVBK 20210128100917.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s10934-015-0025-7 doi (NATIONALLICENCE)springer-10.1007/s10934-015-0025-7 Processing of silica bonded porous SiC preform for metallic composites [Elektronische Daten] [V. Resmi, K. Sree Manu, V. Lakshmi, M. Brahmakumar, T. Rajan, C. Pavithran, B. Pai] Porous SiC ceramics were successfully fabricated by silica bonding of SiC compacts and porogen burnout technique. Silica coating on SiC particle was carried out using TEOS hydrolysis and crystallizes during the sintering process at 1200°C, which forms a well-developed neck growth between the SiC particles. Different volume fractions of sodium chloride porogen were used to obtain varied porosity content in porous SiC ceramics from 36 to 62.47% leading to wide-ranging compressive strength from 8.11 to 0.69MPa. Interconnected bimodal pores were created throughout the sample due to the burnt out of salt and stacking of SiC particles. The pore size distribution of porous SiC measured using mercury intrusion porosimetry shows that average pore size due to the salt particle is around 74-110µm and stacking of SiC particle result 4-10µm. Direct squeeze infiltration method is successfully adopted for infiltration of 6061 aluminium molten alloy into SiC preforms with the controlled process parameters of initial preform temperature, liquid metal superheating, squeezed pressure and its rate of application and die temperature. Microstructures have shown complete infiltration of Al alloy into the pores of the SiC preform forming Al composite with good interfacial bonding aided by the presence of MgAl2O4 spinel. The silica coating on SiC surface have a multifunctional role of acting as a binder for the porous preform, enhances the wettability of SiC particle with molten metal during infiltration and prevention of deleterious Al4C3 interfacial reaction product. Springer Science+Business Media New York, 2015 Silicon carbide nationallicence Preform nationallicence Porogen nationallicence Squeeze infiltration nationallicence Metal-ceramic composites nationallicence Aluminium nationallicence Resmi V. Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, 695019, Trivandrum, India aut Sree Manu K. Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, 695019, Trivandrum, India aut Lakshmi V. Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, 695019, Trivandrum, India aut Brahmakumar M. Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, 695019, Trivandrum, India aut Rajan T. Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, 695019, Trivandrum, India aut Pavithran C. Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, 695019, Trivandrum, India aut Pai B. Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, 695019, Trivandrum, India aut Journal of Porous Materials Springer US; http://www.springer-ny.com 22/6(2015-12-01), 1445-1454 1380-2224 22:6<1445 2015 22 10934 https://doi.org/10.1007/s10934-015-0025-7 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10934-015-0025-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Resmi V. Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, 695019, Trivandrum, India aut NATIONALLICENCE 700 1- Sree Manu K. Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, 695019, Trivandrum, India aut NATIONALLICENCE 700 1- Lakshmi V. Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, 695019, Trivandrum, India aut NATIONALLICENCE 700 1- Brahmakumar M. Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, 695019, Trivandrum, India aut NATIONALLICENCE 700 1- Rajan T. Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, 695019, Trivandrum, India aut NATIONALLICENCE 700 1- Pavithran C. Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, 695019, Trivandrum, India aut NATIONALLICENCE 700 1- Pai B. Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, 695019, Trivandrum, India aut NATIONALLICENCE 773 0- Journal of Porous Materials Springer US; http://www.springer-ny.com 22/6(2015-12-01), 1445-1454 1380-2224 22:6<1445 2015 22 10934