A5084009804- Advanced Thermoelectric Materials and Devices
- Thermal properties of materials
- Thermal Radiation and Cooling Technologies
- Heusler alloys: electronic and magnetic properties
- Chalcogenide Semiconductor Thin Films
- Phase-change materials and chalcogenides
- Advanced Thermodynamics and Statistical Mechanics
- Rare-earth and actinide compounds
- Advanced materials and composites
- Magnetic Properties of Alloys
- High Entropy Alloys Studies
- High-Temperature Coating Behaviors
- Metallic Glasses and Amorphous Alloys
- Additive Manufacturing Materials and Processes
- Aluminum Alloys Composites Properties
- Heat Transfer and Optimization
- Magnetic and transport properties of perovskites and related materials
- Intermetallics and Advanced Alloy Properties
- Thermodynamic and Structural Properties of Metals and Alloys
- Perfectionism, Procrastination, Anxiety Studies
- Transition Metal Oxide Nanomaterials
- Advanced ceramic materials synthesis
- Fluid dynamics and aerodynamics studies
- Gas Sensing Nanomaterials and Sensors
- Advanced Semiconductor Detectors and Materials
Kongju National University
2016-2025
National Institute for Materials Science
2024-2025
SRM Institute of Science and Technology
2020
In this research, p-type BiSbTe/ZrO2 nanocomposite powders were fabricated by high-energy ball milling. Different weight percentages of ZrO2 (2, 4, and 6 wt. %) nanoparticles incorporated into the bulk (BiSbTe) matrix consolidation as-synthesized nanocomposites (NCs) powder spark plasma sintering at 673 K. The phase existence nano-inclusions was confirmed X-ray diffraction transmission electron microscopy-selected area analysis. Seebeck coefficient NCs significantly improved (∼36% for 4 %...
Bismuth-telluride (Bi 2 Te 3 ) based alloys are highly efficient thermoelectric (TE) materials for energy conversion near room temperature. This study fabricated a hybrid composite of p -type Bi 0.5 Sb 1.5 (BST)/Ta O 5 via high-energy ball milling. The BST exhibit rhombohedral structure and reduction in particle size upon Ta doping. In addition, the distinct distribution nanoparticles matrix was noticed. An enhancement Seebeck coefficient, reaches maximum 256 µV/K at 300 K composites despite...
Abstract In this research work, p‐type BiSbTe/ZnO (2 wt%) nanocomposite powders were fabricated by high‐energy ball milling at different times, and subsequently, consolidated spark plasma sintering 673 K temperature. The existence of nanoinclusions was confirmed SEM ‐ EDS mapping. Vickers hardness values greatly improved due to reduction in grain size which prevents the crack propagation dispersion strengthening mechanism. decrease carrier density, plays a critical role thermoelectrics,...
Developing inexpensive and rapid fabrication methods for high efficiency thermoelectric alloys is a crucial challenge the industry, especially energy conversion applications. Here, we fabricated large amounts of p-type Cu0.07Bi0.5Sb1.5Te3 alloys, using water atomization to control its microstructure improve performance by optimizing initial powder size. All atomized powders were sieved with different aperture sizes, 32–75 μm, 75–125 125–200 <200 subsequently consolidated hot pressing at...
Abstract In this research, effect of the various mechanical milling process on morphology and microstructural changes nano micron Al-powders was studied. The performed by both high energy low ball process. influence (pulverizing) structural Al-nanoparticles were agglomerated during MA its size increased with increasing while Al-powder gets flattened shape due to severe plastic deformation. Meanwhile, evolution powder occurred faster than that powder. A slight shift in position X-ray...
Abstract In the present work, we have prepared Bi 2 Te 3 nanostructures with different morphologies such as nano-spherical, nanoplates and nanoflakes obtained using various surfactant additions (EG, PVP, EDTA) by a hydrothermal method. The shape of nanoparticles can be controlled addition surfactants. samples were characterized x-ray diffraction (XRD) scanning electron microscopy (SEM). It is found that minority BiOCl phase disappears after maintained pH at 10 EG surfactant. SEM bulk...
The dispersion of nanoparticles in the host matrix is a novel approach to enhance thermoelectric performance.In this work, we incorporate TiC (x = 0, 1 and 2 wt.%) into p-type Bi 0.5 Sb 1.5 Te 3 matrix, their effects on microstructure properties were systematically investigated.The existence contents base was confirmed by energy dispersive X-ray spectroscopy analysis.The grain size decreases with increasing addition content due boundary hardening where dispersed acted as pinning points...