Articles written in Bulletin of Materials Science
Volume 26 Issue 7 December 2003 pp 715-720 Glasses and Ceramics
Sodium aluminophosphate glasses having compositions of 𝑥Al2O3(1 – 𝑥)NaPO3 (𝑥 = 0.05–0.2) were prepared using conventional melt-quench technique. Density, glass transition temperature, microhardness (MH), thermal expansion coefficient (TEC) and transmission characteristics were measured as a function of alumina content for different samples. They were found to depend on O/P ratio with pronounced changes taking place for O/P ratio ≥ 3.5. Density, glass transition temperature and microhardness were found to increase up to 15 mol% of alumina and then they showed a decreasing trend. Thermal expansion coefficient decreased continuously with alumina content. Optical gaps for different glass samples as measured from transmission characteristics were found to be in the range 3.13–3.51 eV. It initially decreased with alumina content up to 15 mol% and then increased. The behaviour was explained on the basis of change in the average aluminum coordination number from six Al(6) to four Al(4) (i.e. Al(OP)6/Al(OP)4 ratio) along with the changes in polyhedra linkages in the glass network due to change in O/P ratio.
Volume 37 Issue 6 October 2014 pp 1221-1226
Synthesis of cordierite (5SiO2.2MgO.2Al2O3) has attracted special attention from researchers for its special characteristics. Most common method of cordierite preparation is solid-state reaction using source of alumina, silica and magnesia, which requires temperature of 1350 °C or above. This study deals with the effect of mechanical activation on cordierite synthesis at lower temperature. Talc, kaolinite clay and alumina powder were taken as precursor materials and the batches were formulated on the basis of stoichometric cordierite formation. Particle size distribution (PSD) was measured to get the distribution pattern of milled powder. Pellets were prepared by compaction of dried milled powders and fired at 1200 °C temperature. X-ray diffraction (XRD) technique was used to characterize crystalline phases. Microstructural analysis was done under scanning electron microscope (SEM). It was observed that properties were improved with milling time. Dense and uniform microstructures were formed when samples were milled for 45 and 60 min.
Volume 44 All articles Published: 10 June 2021 Article ID 0181
Additive manufacturing (AM) has emerged as a powerful tool of manufacturing over conventional manufacturing techniques due to its customization features, design flexibility, waste minimization and ability to create intrinsic shapes. This technology involves the fabrication of parts by layer-by-layer printing and thus offers robust mechanical properties. This study aims to provide a comprehensive overview of distinct AM processes, history, materials, comparison and their applications in different fields. In addition, this study also summarizes the mechanical properties of distinct parts fabricated by distinct AM methods, so that this research could become the torch bearer for the futuristic researchers working in this area.
Volume 45, 2022
Continuous Article Publishing mode
Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
Chemical Sciences 2020
Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
Physical Sciences 2020
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