Papers by Snezana Boskovic
Journal of Alloys and Compounds, 2011
SiC-TiB 2 particulate composites were fabricated by converting TiO 2 to TiB 2 through the reactio... more SiC-TiB 2 particulate composites were fabricated by converting TiO 2 to TiB 2 through the reaction between TiO 2 , B 4 C and C. The presence of initially very fine, in-situ created, TiB 2 particles increased driving force for sintering and enabled fabrication of a dense composite utilizing pressureless sintering and the liquid phase created between Al 2 O 3 and Y 2 O 3 additives. The effect of volume fraction of the in-situ formed TiB 2 on density, microstructure and flexural strength was discussed. It was found that the presence of TiB 2 particles suppressed the growth of SiC grains and enhanced fracture strength. The fracture strength of samples containing 12 vol% TiB 2 was more than 30% higher than that of the monolithic SiC. The effect of SiC grain size on fracture strength was also analyzed.
Materials Science Forum, May 5, 2004
Revista Româna De Materiale, 2008
Key Engineering Materials, Aug 26, 1993
Prog Solid State Chem, 2006
The technique of positron annihilation lifetime spectroscopy (PALS) in conjunction with standard ... more The technique of positron annihilation lifetime spectroscopy (PALS) in conjunction with standard nitrogen sorption techniques is used to probe the micropores present in microemulsion templated mesocellular foam (MCF) silica materials and hybrid MCF silica materials formed via a post synthesis functionalisation with (3-aminopropyl)triethoxysilane (APTES). For the MCF silica materials, the PALS results show that the number of micropores present decreases as the synthesis aging temperature is increased, which follows the trend seen in the micropore volumes determined from nitrogen sorption t-plot analysis. The presence of the micropores and the trend seen in the micropore volumes with increasing temperature was attributed to the level of hydration of the poly(ethylene oxide) components in the amphiphilic block copolymer/trimethylbenzene microemulsion from which the materials are templated. For the hybrid APTES functionalised MCF silica, analysis via PALS completed in both nitrogen and air environments, indicates that the micropores are blocked and replaced by a closed microporosity associated with the APTES layer formed within the mesopores.
International Journal of Powder Metallurgy
Uploads
Papers by Snezana Boskovic